Volume 76, No. 4, October 2012

Total Page:16

File Type:pdf, Size:1020Kb

Volume 76, No. 4, October 2012 Inside Volume 76, No.4, October 2012 Articles and Features 118 Ionic liquids: Some of their remarkable properties and some of their applications Owen J. Curnow 123 The evolution of chemistry and medicine in the 18th and 19th centuries Michael Edmonds 127 Enlivening science for secondary school students: interschool competitions at CPIT David J. Hawke 129 When plants bite back: A broadly applicable method for the determination of cyanogenic glycosides as hydrogen cyanide in plant-based foodstuffs Darren A. Saunders 132 The Olympic rings and the chemistry of olympicene 133 Implications of a novel interpretation of the isosbestic point R. Sanjeev, V. Jagannadham and R. Veda Vrath 135 Obituary: Professor Martin Fleischmann, March 1927 – 3 August 2012 Other Columns 110 Comment from the President 139 Dates of Note 110 NZIC October News 141 Conference Calendar 117 Chemistry News 141 Grants and Awards 132 Science Scene 142 Author Index 138 Patent Proze 142 Subject Index Advertising Inside front cover ThermoFisher Scientific 122 NZIC AGM Inside back cover Sigma-Aldrich Cover Front cover: Exploring plant-derived medicines in the 18th and 19th centuries. See article by Edmonds, page 123. Photo by Matt Walters, School of Biological Sciences, University of Canterbury. 109 Chemistry in New Zealand October 2012 Comment from the President Time flies; welcome to ard Tilley of Victoria University of Wellington. Each and the last issue of CiNZ every year the standard of applications for our prizes rein- for 2012. First of all a forces the high quality of chemistry research and teaching reminder of something in New Zealand. I mentioned in the Janu- NZIC News ary issue: our mem- And, finally, back to my Comment from the July issue bership; we had 905 requesting entries for the “Top Ten List” of Chemistry’s members in 2011; the Greatest Challenges: Thanks to everyone for their emails 2012 number of paid – here is your list: up members (to date) is • Activation of nitrogen to reduce the energy (and cost) only 798. Please remind of the industrial production of ammonia (a process that your colleagues and stu- currently sustains about a third of the world’s popula- dents to support NZIC; tion) we support chemistry in New Zealand at ev- • The origins of chirality ery level and the more • A stable and economic water-splitting catalyst to sup- members we have the more we can do. One of our ma- port biomimetic systems jor activities is providing national conferences; our na- tional meeting will be in Wellington next year tentatively • What is life? Why do some collections of molecules booked for 2-5 December, and the biennial ChemEd (i.e., living organisms) exhibit it and others not? Teacher’s Conference will be in Dunedin in 2013. The de- • C-H activation of alkanes tails of these meetings will be announced in future issues of CiNZ and ChemEd NZ so keep an eye out for updates • The development of nanoscale cell-specific delivery in the next couple of issues of our publications. systems to target drugs to diseased cells — an advance that would revolutionize many medical treatments Another key activity each year is the awarding of our • Advances in battery technology to support pollution- prizes. In this issue you will find details of this year’s free transportation winners. Congratulations go first to Rudi Jansen who was awarded the ABA Books Denis Hogan ChemED prize; • An improved theory of chemical bonding the award was announced when Rudi was co-presenting • Controlled nuclear fusion (we allow physicists in the “Chemistry Extravaganza” in Christchurch – this is a NZIC!) series of practical demonstrations to a public audience. Congratulations also go to the recipients of our two re- • Development of photovoltaic systems using materials search prizes. Our Industrial and Applied Chemistry that are earth-abundant and cheap award this year has been given to Professor Brian Rob- If you have the answers, publish first inCiNZ ! inson and Dr Stephen Moratti at Otago University; and the Maurice Wilkins Centre prize for Chemical Science Julian Eaton-Rye this year has been awarded to Associate Professor Rich- NZIC President New Zealand Institute of Chemistry supporting chemical sciences October News NZIC NEWS BRANCH NEWS included marine waxes, squalene, The 2013 NZIC Conference is to be phospholipids and long chain poly- held from 2-5 December in Welling- AUCKLAND unsaturated fatty acids, and their as- ton on the Pipitea campus of Victoria At a July NZIC branch seminar, Dr sociated chemistry. University. The venue is Rutherford Laurence Eyres, Chairman of the University of Auckland House, a key down-town venue close NZIC Oils and Fats Specialist Group, to the Wellington railway station, presented on Industrial lipid chem- The School of Chemical Sciences public transport, accommodation istry: some experiences 1974-2012. at the University of Auckland has and various hospitality options. The Laurence was able to provide a very been increasingly occupied with conference chairman is Richard Fur- interesting perspective on oils and planning around a major building re- neaux (IRL) and the organising com- fats, and various fatty acid deriva- development project. An important mittee is being led by Rob Keyzers tives, over his 35-year career in the step in the process came at the end (VUW). Planning is well advanced. New Zealand food industry. Topics of June when the University Council 110 Chemistry in New Zealand October 2012 approved the $200M upgrade to the Fisher & Paykel Healthcare Prize sity of Cleveland, Ohio, on Phos- the ‘301’ building on the corner went to Meder Kamalov, with Bren- phorus as a carbon copy and as a of Symonds and Wellesley Streets dan Harvey and U Bin Kim being photocopy for conjugated polymer that houses the School of Chemical second equal. PhD student Sarah and materials chemistry, with a focus Sciences. Future planning includes Thompson was also one of eight stu- on new materials based on benzoxa- the demolition of an existing south dents to make the final of the three- phospholes, benzobisoxaphospholes, podium, to be replaced by a 10 storey minute thesis talks in a University- and higher analogues having high 23,500m2 structure and refurbishment wide competition. fluorescence quantum yields. A/Prof of the existing 301 tower building. Stephen Moratti from the Univer- Several departments within the Notable achievements by School sity of Otago spoke on the synthesis Faculty of Science will be located in staff include the appointment of Prof. and applications of gels for use in the new building, with completion Margaret Brimble as an Associate surgery, including the synthesis and planned for 2017. Over the next few Editor for Organic and Biomolecular properties of a promising chitosan- years many of the current chemistry Chemistry, published by the Royal dextran gel. Prof Janine Cossy, from operations will need to be relocated Society of Chemistry, following six the Laboratoire de Chimie Orga- as part of the building programme. years of service on the Journal’s Edi- nique ESPCI Paris Tech, presented torial Board. Dr Siew Young Quek on Methods to access heterocyclic On the staffing front, Dr Geoff received a Fellowship Award from compounds applications, with meth- Waterhouse has been appointed the New Zealand Institute of Food ods outlined for the synthesis of bio- as a senior lecturer in physical Science and Technology at their logically active complex natural and chemistry. Geoff has been involved conference last week, to mark Siew non-natural heterocycles. Dr Bill in research and teaching within the Young’s contribution and achieve- Telford from the National Cancer School for some years, and he will ment in research and teaching in Institute, Bethesda, Maryland, USA, have particular responsibilities for Food Science and Technology over presented on Novel laser sources for developing links with the Australian the past 12 years. School manager flow cytometry – covering the entire Synchrotron. Geoff was recently Cathy Comber received a Faculty of visible spectrum, including develop- successful as a co-investigator on a Science Professional Staff Award in ments in laser technology and the Human Frontier Science Programme Professional Development. This will ever-expanding palette of fluorescent grant to investigate the chemistry of enable her to attend the 2012 Tertiary probes available to life scientists. visual trickery: mechanisms of egg Education Management Conference Dr Nigel Lucas from the University colour mimicry in parasitic cuckoos. in Adelaide in September. of Otago presented on Well-defined, soluble synthetic graphenes and gra- The annual Chemistry Research The School of Chemical Sciences was phene-metal complexes, covering the Showcase was held in June, and fea- pleased to welcome Larraine Barton, synthetic and supramolecular chem- tured over 70 posters and 24 short oral Head of Science at Pakuranga Col- istry of graphenes, graphene-based presentations by first year PhD stu- lege in Auckland, to spend time on ligands and complexes, along with dents, from which six students were an Endeavour Teacher Fellowship. their solution, solid-state and sur- chosen to give full oral presentations. Larraine is undertaking a project in- face organisational properties. A/Prof A number of prizes were awarded vestigating soil geochemistry on the Shelli McAlpine, from the School of within the student competitions. For Goldie vineyard, Waiheke Island, Chemistry at the University of New the second-year poster competition, hosted by A/Prof Paul Kilmartin and South Wales, talked about Macro- first place and the Baldwin Prize A/Prof Jeff Mauk from the School of cyclic peptides – the perfect tools to went to Lian Hsien Kho, with second Environment. In August the School explore protein function, and a recent place to Jiayi Wang and third place farewelled Vern Rule on his retire- discovery that led to a new class of to Karl Fraser. In the general poster ment after 43 years of service as part Hsp90 regulators.
Recommended publications
  • May-June 2013 OUTLOOK on Volume 35 No
    CHEMISTRY International The News Magazine of IUPAC May-June 2013 OUTLOOK ON Volume 35 No. 3 LATIN AMERICA Neglected Tropical Diseases INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY Green Chemistry in Teaching From the Editor CHEMISTRY International ay is a month of many celebrations. As we have mentioned several Mtimes before in CI, 20 May is World Metrology Day, which com- The News Magazine of the International Union of Pure and memorates the signing by representatives of 17 nations of The Metre Applied Chemistry (IUPAC) Convention on that day in 1875. This year, the theme is “Measurements in Daily Life”—see more at www.worldmetrologyday.org. www.iupac.org/publications/ci While living in the states, but having grown up in Belgium, I have found that measurements in my daily life can be quite bewildering. A simple Managing Editor: Fabienne Meyers length mentioned in inches, a travel distance Production Editor: Chris Brouwer referred to in miles, a quantity in a cook book Design: pubsimple specified in spoons or cups, or my own weight blurred in pounds on my bathroom scale make All correspondence to be addressed to: no sense to me. And, it is beyond me that this Fabienne Meyers “New World” is stuck in a nonmetric system. If IUPAC, c/o Department of Chemistry on 20 May I can convince just one friend that Boston University SI is the way to go, even for daily usage, it is Metcalf Center for Science and Engineering worth celebrating! 590 Commonwealth Ave. There are many more international and world days in May, several that Boston, MA 02215, USA are even recognized by the UN or UNESCO.
    [Show full text]
  • Synthesis and Properties of Corannulene Derivatives: Journey to Materials Chemistry and Chemical Biology
    Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 2008 Synthesis and properties of corannulene derivatives: journey to materials chemistry and chemical biology Hayama, Tomoharu Abstract: Corannulene, also called as [5]-circulene, is a C20H10 fragment of buckminsterfullerene, C60. The most interesting property of corannulene is probably its bowl structure and bowl-to-bowl inversion. The unique curvature has many possiblities for applications in different fields. Today, large-scale synthesis of corannulene is possible and thus, the time has come to exploit its physical properties. This disserta- tion is divided into four areas: 1) efficient synthesis of sym-pentaarylsubstituedcorannulene derivatives, 2) solvent effect on the bowl inversion, 3) development of the method for solution-phase nanotube syn- thesis, and 4) designing a corannulene-based synthetic receptor. sym-pentaarylsubstituedcorannulenes are quite attractive compounds because of their five-fold symmetry and curvature. The efficient synthesis has been accomplished from sym-pentachlorocorannulene with the coupling reaction using N-heterocyclic carbene ligands in a moderately good yield in spite of its five low-reactive chlorides. The inversion energies of some sym-pentaarylsubstituedcorannulenes have been investigated in different types of sol- vent. The variable temperature 1H-NMR spectra were measured, and line shape analysis or coalescence approximation were used to evaluate the rate parameters. This experiment suggested endo-group inter- actions of those compounds and shows influences of solvent polarity or volume on the inversion energies. In addition, the bowl depths will also be compared and discussed using the crystallographic structural data. The high-energy per-ethynylated polynuclear compound decapentynyl-corannulene has been pre- pared via aryl-alkyne coupling chemistry of decachlorocorannulene.
    [Show full text]
  • Polycyclic Aromatic Hydrocarbon Structure Index
    NIST Special Publication 922 Polycyclic Aromatic Hydrocarbon Structure Index Lane C. Sander and Stephen A. Wise Chemical Science and Technology Laboratory National Institute of Standards and Technology Gaithersburg, MD 20899-0001 December 1997 revised August 2020 U.S. Department of Commerce William M. Daley, Secretary Technology Administration Gary R. Bachula, Acting Under Secretary for Technology National Institute of Standards and Technology Raymond G. Kammer, Director Polycyclic Aromatic Hydrocarbon Structure Index Lane C. Sander and Stephen A. Wise Chemical Science and Technology Laboratory National Institute of Standards and Technology Gaithersburg, MD 20899 This tabulation is presented as an aid in the identification of the chemical structures of polycyclic aromatic hydrocarbons (PAHs). The Structure Index consists of two parts: (1) a cross index of named PAHs listed in alphabetical order, and (2) chemical structures including ring numbering, name(s), Chemical Abstract Service (CAS) Registry numbers, chemical formulas, molecular weights, and length-to-breadth ratios (L/B) and shape descriptors of PAHs listed in order of increasing molecular weight. Where possible, synonyms (including those employing alternate and/or obsolete naming conventions) have been included. Synonyms used in the Structure Index were compiled from a variety of sources including “Polynuclear Aromatic Hydrocarbons Nomenclature Guide,” by Loening, et al. [1], “Analytical Chemistry of Polycyclic Aromatic Compounds,” by Lee et al. [2], “Calculated Molecular Properties of Polycyclic Aromatic Hydrocarbons,” by Hites and Simonsick [3], “Handbook of Polycyclic Hydrocarbons,” by J. R. Dias [4], “The Ring Index,” by Patterson and Capell [5], “CAS 12th Collective Index,” [6] and “Aldrich Structure Index” [7]. In this publication the IUPAC preferred name is shown in large or bold type.
    [Show full text]
  • Luis Federico Leloir, En El 50 Aniversario De La
    LUIS FEDERICO LELOIR, EN EL 50 ANIVERSARIO DE LA CONCESIÓN DEL PREMIO NOBEL DE QUÍMICA LUIS FEDERICO LELOIR, ON THE 50TH ANNIVERSARY OF THE AWARDING OF THE NOBEL PRIZE IN CHEMISTRY Leiva-Cepas, Fernando1-4; López-López, Isabel5 1 Departamento de Ciencias Morfológicas y Sociosanitarias. Facultad de Medicina y Enfermería. Universidad de Córdoba. 2 Servicio de Anatomía Patológica. Hospital Universitario Reina Sofía de Córdoba. España. 3 Grupo de Investigación en Regeneración Muscular CTS-985. 4 GC-12. GICEAP. Instituto Maimónides de Investigación Biomédica Traslacional de Córdoba. 5 UGC de Nefrología. Hospital Universitario Reina Sofía de Córdoba. España. Recibido: 15/09/2020 | Revisado: 01/11/2020 | Aceptado: 29/11/2020 DOI: 10.15568/am.2020.811.hca01 Actual Med. 2020; 105(811): 248-250 Historia, Conmemoraciones y Aniversarios El camino de la investigación científica es polimorfo. nandola para entregarse de manera integral a la inves- Esto quiere decir que aunque se inicie una trayecto- tigación científica (2). ria de una manera, los designios de la misma pueden cambiar el fin último de la ciencia practicada. El ca- Tras conocer los estudios de fisiología del Profesor mino más corto entre dos puntos, no siempre es la Houssay (Premio Nobel de Medicina y Fisiología línea recta. Leloir es la referencia del discípulo que en 1947), se incorpora a su instituto para realizar iguala o aventaja al maestro conservando la lealtad, el su tesis doctoral, propuesta de su decisivo maestro: respeto y la deferencia. “Suprarrenales y metabolismo de los hidratos de car- bono”, en el metabolismo glucídico en las glándulas Luis Federico Leloir nace en París el 6 de septiembre suprarrenales (Premio de la Facultad de Medicina de 1906, y es un producto genuinamente argentino, una de Buenos Aires en 1934).
    [Show full text]
  • Los Premios Nobel De Química
    Los premios Nobel de Química MATERIAL RECOPILADO POR: DULCE MARÍA DE ANDRÉS CABRERIZO Los premios Nobel de Química El campo de la Química que más premios ha recibido es el de la Quí- mica Orgánica. Frederick Sanger es el único laurea- do que ganó el premio en dos oca- siones, en 1958 y 1980. Otros dos también ganaron premios Nobel en otros campos: Marie Curie (física en El Premio Nobel de Química es entregado anual- 1903, química en 1911) y Linus Carl mente por la Academia Sueca a científicos que so- bresalen por sus contribuciones en el campo de la Pauling (química en 1954, paz en Física. 1962). Seis mujeres han ganado el Es uno de los cinco premios Nobel establecidos en premio: Marie Curie, Irène Joliot- el testamento de Alfred Nobel, en 1895, y que son dados a todos aquellos individuos que realizan Curie (1935), Dorothy Crowfoot Ho- contribuciones notables en la Química, la Física, la dgkin (1964), Ada Yonath (2009) y Literatura, la Paz y la Fisiología o Medicina. Emmanuelle Charpentier y Jennifer Según el testamento de Nobel, este reconocimien- to es administrado directamente por la Fundación Doudna (2020) Nobel y concedido por un comité conformado por Ha habido ocho años en los que no cinco miembros que son elegidos por la Real Aca- demia Sueca de las Ciencias. se entregó el premio Nobel de Quí- El primer Premio Nobel de Química fue otorgado mica, en algunas ocasiones por de- en 1901 al holandés Jacobus Henricus van't Hoff. clararse desierto y en otras por la Cada destinatario recibe una medalla, un diploma y situación de guerra mundial y el exi- un premio económico que ha variado a lo largo de los años.
    [Show full text]
  • Monoradicals and Diradicals of Dibenzofluoreno[3,2-B]Fluorene Isomers: Mechanisms of Electronic Delocalization
    pubs.acs.org/JACS Article Monoradicals and Diradicals of Dibenzofluoreno[3,2‑b]fluorene Isomers: Mechanisms of Electronic Delocalization Hideki Hayashi,○ Joshua E. Barker,○ Abel Cardenaś Valdivia,○ Ryohei Kishi, Samantha N. MacMillan, Carlos J. Gomez-Garć ía, Hidenori Miyauchi, Yosuke Nakamura, Masayoshi Nakano,* Shin-ichiro Kato,* Michael M. Haley,* and Juan Casado* Cite This: J. Am. Chem. Soc. 2020, 142, 20444−20455 Read Online ACCESS Metrics & More Article Recommendations *sı Supporting Information ABSTRACT: The preparation of a series of dibenzo- and tetrabenzo-fused fluoreno[3,2-b]fluorenes is disclosed, and the diradicaloid properties of these molecules are compared with those of a similar, previously reported series of anthracene-based diradicaloids. Insights on the diradical mode of delocalization tuning by constitutional isomerism of the external naphthalenes has been explored by means of the physical approach (dissection of the electronic properties in terms of electronic repulsion and transfer integral) of diradicals. This study has also been extended to the redox species of the two series of compounds and found that the radical cations have the same stabilization mode by delocalization that the neutral diradicals while the radical anions, contrarily, are stabilized by aromatization of the central core. The synthesis of the fluorenofluorene series and their characterization by electronic absorption and vibrational Raman spectroscopies, X-ray diffraction, SQUID measurements, electrochemistry, in situ UV−vis−NIR absorption spectroelectro- chemistry, and theoretical calculations are presented. This work attempts to unify the properties of different series of diradicaloids in a common argument as well as the properties of the carbocations and carbanions derived from them.
    [Show full text]
  • Synthesis of an Unsymmetrically Pentafunctionalized Corannulene Derivative (Part I) Synthesis of Platinum and Ethynyl-Platinum Corannulenes (Part II)
    Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 2012 Synthesis of an Unsymmetrically Pentafunctionalized Corannulene Derivative (Part I) Synthesis of Platinum and Ethynyl-Platinum Corannulenes (Part II) Maag, Roman M Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-164179 Dissertation Published Version Originally published at: Maag, Roman M. Synthesis of an Unsymmetrically Pentafunctionalized Corannulene Derivative (Part I) Synthesis of Platinum and Ethynyl-Platinum Corannulenes (Part II). 2012, University of Zurich, Faculty of Science. Part I: Synthesis of an Unsymmetrically Pentafunctionalized Corannulene Derivative and Part II: Synthesis of Platinum and Ethynyl-Platinum Corannulenes Dissertation zur Erlangung der naturwissenschaftlichen Doktorwurde¨ Dr. sc. nat. vorgelegt der Mathematisch-naturwissenschaftlichen Fakult¨at der Universit¨at Zurich¨ von Roman M. Maag von Winkel ZH Promotionskommitee: Prof. Dr. Jay S. Siegel (Vorsitz) Prof. Dr. Kim K. Baldridge Prof. Dr. Cristina Nevado Prof. Dr. Roger Alberto Zurich,¨ 2012 Abstract of the Dissertation Part I: Synthesis of an Unsymmetrically Pentafunctionalized Corannulene Derivative and Part II: Synthesis of Platinum and Ethynyl-Platinum Corannulenes by Roman M. Maag University of Zurich, 2012 Prof. Dr. Jay S. Siegel, Chair Corannulene (C20H10) is a polyaromatic hydrocarbon that can be considered as the smallest fragment of Buckminsterfullerene exhibiting a curved surface. Among the in- teresting properties of corannulene are rapid bowl inversion and esthetically appealing fivefold symmetry (C5v), which is rare in chemistry. Whereas the first synthesis in 1968 only afforded milligram quantities, several improvements in the synthetic strategy finally culminated in the development of an efficient process which today furnishes corannulene in kilogram quantities.
    [Show full text]
  • A DFT Study on Sumanene, Corannulene and Nanosheet As the Anodes in Li−Ion Batteries
    Iran. J. Chem. Chem. Eng. Research Article Vol. 39, No. 6, 2020 Archive of SID A DFT study on Sumanene, Corannulene and Nanosheet as the Anodes in Li−Ion Batteries Gharibzadeh, Fatemeh Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, I.R. IRAN Vessally, Esmail Department of Chemistry, Payame Noor University, Tehran, I.R. IRAN Edjlali, Ladan*+; Es’haghi, Moosa Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, I.R. IRAN Mohammadi, Robab Department of Chemistry, Payame Noor University, Tehran, I.R. IRAN ABSTRACT: Herein, we studied interactions between the Li neutral atom and Li+ ion and three types of nanoparticles including sumanene (Sum), corannulene (Cor), and nanosheet to obtain the cell voltage (V) for Li−ion batteries (LIBs). Total energies, geometry optimizations, Frontier Molecular Orbital (FMO), and Density of States (DOS) analyses have been obtained using M06−2X level of theory and 6−31+G (d,p) basis set. DFT calculations clarified that the changes of energy + adsorption between Li ion and nanoparticles, Ead, are in the order: Sheet > Sum−I > Cor > Cor−I > Sum. However, the Vcell for Sum is the highest. The changes in Vcell of Li−ion batteries (LIBs) are in the order: Sum > Sheet > Sum−i > Cor > Cor−i. This study theoretically indicates the possibility of Li as the anode in the battery field. KEYWORDS: DFT study; Sumanene; Corannulene; Nanosheet; Li−ion Batteries. INTRODUCTION Rechargeable batteries are very important to batteries due to its low density, high specific capacity, generation the electricity. The dry batteries, such as Zn−C, and the lowest electrochemical potential of the periodic table [1].
    [Show full text]
  • &Quien Es El Doctor Luis Federico Leloir?
    LUIS FEDERICO LELOIR, En 1956 fue necesario crearle la espectacularidad y ofrece, por el Su respuesta no se hizo esperar, categoria . de profesor extraordina­ contrario, la imagen del hombre mientras los dedos de sus manos "NACI ALLA POR EL 900", rio porque no había en su espe. humilde. Habíamos c:>ncertado la permanecían entrelazados, quietos. ES UNO DE LOS CIENTIFI­ cíalidad quien pudiera integrar entrevista por teléfono el jueves Su mirada fria se hundía en mí. un c.oncurso para juzgarlo. Y, sin por la noche. Y al día siguiente, -A ver. creo que nací allá COS MAS IMPORTANTES embargo, sigue siendo un hombre a las 15.30, lo encontramos en su por el 1900; un 6 de septiembre DEL MUNDO Y ES ARGEN­ retraído, asombrosamente modes­ ambiente, es decir, entre la~ vie· de 1906, debo tener, pues, unos to y con una paciencia a toda prue­ jas paredes del Instituto de lnves· 62 años. • TINO. SUS APORTES AL ba. Rehúye la publicidad y prefie· tigaciones B ioquímic~o;o. al 2400 de -¿Usted es argentino, d,octor? CAMPO DE LA BIOQUIMI­ re permanecer en el anonimato, la calle Obligado, . en el barrio de -Mis padres son argentinos, pe- - CA SON INNUMERABLES. aun cuando ha recibido gran canti· Belgrano. Al doctor Luis Federico ro yo he nacido en Francia; diga- r~ dad de premios en dinero, que los Leloir Lo enmarcan un verdadero mos por casualidad. pero luego SU PERSONALIDAD, SOR­ acepta pero que los dedica a la arsenal de máquinas, probetas, opté por ciudadanizarme. PRENDENTE. DESCONO­ ciencia. En su laboratorio usa guar­ tubos de ensayo, estanterías y mos­ - ¿Cuál es su especialidad? dapolvo de ordenanza color gris, tradores de trabajo.
    [Show full text]
  • Enantioselective Synthesis of a Chiral Nitrogen-Doped Buckybowl
    ARTICLE Received 9 Mar 2012 | Accepted 9 May 2012 | Published 12 Jun 2012 DOI: 10.1038/ncomms1896 Enantioselective synthesis of a chiral nitrogen- doped buckybowl Qitao Tan1, Shuhei Higashibayashi1,2, Sangita Karanjit2 & Hidehiro Sakurai1,2 Bowl-shaped aromatic compounds, namely buckybowls constitute a family of curved polycyclic aromatic carbons along with fullerenes and carbon nanotubes. Doping of heteroatoms to the carbon frameworks of such aromatic compounds drastically modulates their physical and chemical properties. In contrast to nitrogen-doped azafullerenes or carbon nanotubes, synthesis of azabuckybowls, nitrogen-doped buckybowls, remains an unsolved challenging task. Here we report the first enantioselective synthesis of a chiral azabuckybowl, triazasumanene. X-ray crystallographic analysis confirmed that the doping of nitrogen induces a more curved and deeper bowl structure than in all-carbon buckybowls. As a result of the deeper bowl structure, the activation energy for the bowl inversion (thermal flipping of the bowl structure) reaches an extraordinarily high value (42.2 kcal per mol). As the bowl inversion corresponds to the racemization process for chiral buckybowls, this high bowl inversion energy leads to very stable chirality of triazasumanene. 1 Research Center for Molecular Scale Nanoscience, Institute for Molecular Science, Myodaiji, Okazaki 444-8787, Japan. 2 School of Physical Sciences, the Graduate University for Advanced Studies, Myodaiji, Okazaki 444-8787, Japan. Correspondence and requests for materials should be addressed to S.H. (email: [email protected]). NATURE COMMUNICATIONS | 3:891 | DOI: 10.1038/ncomms1896 | www.nature.com/naturecommunications © 2012 Macmillan Publishers Limited. All rights reserved. ARTICLE NatUre cOMMUNicatiONS | DOI: 10.1038/ncomms1896 olycyclic aromatic carbons with curved π-conjugated struc- R N tures, such as fullerenes and carbon nanotubes (CNTs), exhibit Pfascinating physicochemical properties especially in material science1–3.
    [Show full text]
  • Historie Chemie 19
    MASARYKOVA UNIVERZITA PEDAGOGICKÁ FAKULTA KATEDRA CHEMIE Vybrané kapitoly z historie chemie 19. – 20. století (Příloha bakalářské práce) Brno 2010 Vedoucí bakalářské práce: Vypracovala: doc. Mgr. Hana Cídlová, Dr. Barbora Kohoutková Obsah Předmluva .......................................................................................................... 3 Vybrané kapitoly z historie chemie 19. – 20. století ........................................... 4 Přehled laureátů Nobelovy ceny za chemii ....................................................... 32 Ţivotopisy laureátů Nobelovy ceny za chemii .................................................. 49 Seznam pouţité literatury: .............................................................................. 145 Předmluva Tato studijní pomůcka byla vytvořena jako součást bakalářské práce především pro potřebu studentů Pedagogické fakulty Masarykovy univerzity navazujícího magisterského programu N-ZS Učitelství pro základní školy, oboru CH2 Učitelství chemie pro základní školy v kombinaci s jiným oborem pro předmět Historie chemie. Tento studijní materiál bude studentům k dispozici v podobě www stránek. Autoři upozorňují, ţe tento studijní materiál bude dále upravován a jeho konečná podoba bude zveřejněna v rámci práce diplomové. Studijní pomůcka obsahuje následující části: 1. Vybrané kapitoly z historie chemie 19. – 20. století 2. Přehled laureátů Nobelovy ceny za chemii 3. Ţivotopisy laureátů Nobelovy ceny za chemii Vybrané kapitoly z historie chemie 19. – 20. století 1. ATOM Je zajímavé, že
    [Show full text]
  • Annual Review 2018 from the DIRECTOR GENERAL
    Published by Institute for Molecular Science National Institutes of Natural Sciences Myodaiji, Okazaki 444-8585, Japan Phone: +81-564-55-7418 (Secretary Room) Fax: +81-564-54-2254 (Secretary Room) URL: http://www.ims.ac.jp/en/ Editorial Committee 2018 Chairperson MASAOKA, Shigeyuki Vice-Chairperson TANAKA, Kiyohisa NGUYEN, Thanh Phuc ITO, Soichi EHARA, Masahiro FUJIMOTO, Masaki IZAWA, Seiichiro ANDO, Jun KONDO, Mio FURUIKE, Yoshihiko KOSUGI, Takahiro YOSHIZAWA, Daichi NAGASONO, Hisayo NAKAMURA, Rie Annual Review 2018 FROM THE DIRECTOR GENERAL Institute for Molecular Science (IMS) is one of the world’s core research facilities for molecular science and is also a center for inter-university joint research in Japan. It sets an extremely wide range of research goals, from understanding the behavior of individual molecules to that of collective molecular systems. These molecular systems have close relation to scientific understanding of biology, engineering and space sciences. Currently, IMS is engaged in six (four plus two) areas of research: Theoretical and computational molecular science, Photo-molecular science, Materials molecular science, and Life and coordination-complex molecular science. Research Center of Integrative Molecular Systems (CIMoS), the fifth research division of IMS, has started from April, 2013 to develop the highly functional molecular systems such as molecular rhythms, sensing and response, and even self-repair. Starting from April 2017, Center for Mesoscopic Sciences (CMS) is launched to develop innovative methodology of studying mesoscopic molecular systems, covering from theoretical methods to leading-edge measurement methods. In addition to these research divisions, IMS has three research facilities; UVSOR Synchrotron Facility, Instrument Center facilitated with various molecular detectors, and Equipment Development Center.
    [Show full text]