High-Frequency and High-Field EPR/ESR in Tallahassee, FL
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Cr7ni Wheels: Supramolecular Tectons for the Physical Implementation of Quantum Information Processing
magnetochemistry Review Cr7Ni Wheels: Supramolecular Tectons for the Physical Implementation of Quantum Information Processing Jesus Ferrando-Soria † School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK; [email protected]; Tel.: +34-963-544460 † Present address: Instituto de Ciencia Molecular (ICMol), Universitat de València, Paterna 46980, València, Spain. Academic Editor: Floriana Tuna Received: 11 August 2016; Accepted: 15 September 2016; Published: 21 September 2016 Abstract: The physical implementation of quantum information processing (QIP) is an emerging field that requires finding a suitable candidate as a quantum bit (qubit), the basic unit for quantum information, which can be organised in a scalable manner to implement quantum gates (QGs) capable of performing computational tasks. Supramolecular chemistry offers a wide range of chemical tools to bring together, with great control, different molecular building blocks in order to grow supramolecular assemblies that have the potential to achieve the current milestones in the field. In this review, we are particularly interested in the latest research developments on the supramolecular chemistry approach to QIP using {Cr7Ni} wheels as qubits for the physical implementation of QGs. Special emphasis will be given to the unique high degree of chemical tunability of this unique class of heterobimetallic octanuclear rings, which results in an attractive playground to generate aesthetically pleasing supramolecular assemblies of increasing structural complexity and interesting physical properties for quantum computing. Keywords: {Cr7Ni} heterobimetallic rings; quantum information processing; supramolecular chemistry; qubits; quantum gates 1. Introduction: Molecules as Qubits The physical implementation of quantum information processing (QIP) is currently a subject of intense research in chemistry, physics, materials science, and nanotechnology because of the thrilling potential technological applications that chemical and physical systems may exhibit in quantum computing [1–4]. -
ED093664.Pdf
DOCUMENT RESUME ED 093 664 SE 017 755 TITLE National Science Foundation Annual Report 1973. INSTITUTION National Science Foundation, Washington, D.C. REPORT NO NSF-74-1 PUB DATE 73 NOTE 127p. AVAILABLE FROMSuperintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 ($2.35) EDRS PRICE MF-$0.75 HC-$6.60 PLUS POSTAGE DESCRIPTORS *Aunual Reports; Mathematics Education; *Program Descriptions; Research; *Research Projects; Science Education; Sciences; Scientific Research; Teacher Education IDENTIFIERS *National Science Foundation ABSTRACT Statistics on the allotment of funds and descriptions of activities carried out under the auspices of the National Science Foundation (NSF) in 1973 are reported. Details are provided for activities in the categories of:(1) research project support, (2). national and international programs,(3) research applications, (it): science education research and programs, and (5) science resources and policy studies. Among the appendices are a listing of staff, advisory committee, and panel members; details cf organization changes and appointments; a financial report for 1973; a description of patents resulting from NSF-supported activities; a publications list; and a list of national research centers' contractors. (RE) Ii National Science U.S. DEPARTMENT OF HEALTH, ' EDUCATION 8 WELFARE Foundation NATIONAL INSTITUTE OF EDUCATION THIS DOCUMENT HAS BEEN REPRO DUCED EXACTLY AS RECEIVED FROM THE PERSON OR ORGANIZATION ORIGIN MING IT POINTS OF VIEW OR OPINIONS Annual Report 0 STATED DO NOT NECESSARILY REPRE re1 SENT OFFICIAL NATIONAL INSTITUTE OF 90' EDUCATION POSITION OR POLICY. 1973 Letter of Transmittal Washington, D.C. DEAR MR. PRESIDENT: I have the honor to transmit herewith the Annual Report for Fiscal Year 1973 of the National Science Foundation for submission to the Congress as required by the National Science Foundation Act of 1950. -
N Ew Slet T Er
Electron paramagnetic resonance spectroscopy Now located in the PSI, the EPSRC National EPR Research Facility and Service is run by Profs David Collison and Eric McInnes from the School of Chemistry and has been established with £4.1M fund- ing from EPSRC, and £355K from the University of Manchester. The Facility accommodates several Bruker EPR in- struments, allowing c.w. and pulsed EPR measure- ments at frequencies between 1 (L-band) and 95 GHz (W-band), a Quantum Design magnetometer and an ODESSA instrument (built by Dr Nigel Poolton) The EPR Team from right to left: Prof Eric McInnes, Dr Stephen Sproules, Prof David Collison, Dr Floriana Tuna, that combines optically detected magnetic resonance Dr Brian Tolson, Miss Chloe Stott, Dr Nigel Poolton (absent) (ODMR) with photo-EPR (both 34 GHz; 0-4 T mag- Facilities: Frequency (GHz): 1, 4, 9.5, 24, 34, 94 net). Together these make a unique research base for Frequency Band: L-, S-, X-, K-, Q-, W- studying various types of paramagnetic species and Modes: Parallel and perpendicular at X-band materials. Temperature Range: 4.2 to 300 K all bands, to 500 K at X-band only Researchers across the country are using the Facility on a regular basis. PhD students and academics are For further details see the Facility website: encouraged to visit the Centre and to gain ―hands on‖ http://www.epr.chemistry.manchester.ac.uk/ experience. Newsletter Winter 2011/12 This newsletter consists of a combination of articles, highlighting both recent grant successes and those of a personal nature. Until further notice, items for future newsletters and/or the PSI website should be sent to [email protected]. -
The 45Th Annual International Meeting of the ESR Spectroscopy Group of the Royal Society of Chemistry
The 45th Annual International Meeting of the ESR Spectroscopy Group of the Royal Society of Chemistry The University of Manchester 25th – 29th March 2012 Contents Conference Programme 3 Information for delegates 6 Getting there 6 Map of conference venue 9 University of Manchester campus map 10 Speaker/poster presenter information 11 Internet access 11 Car parking/taxis 11 Checking out and left luggage 11 Accompanying persons 12 Free afternoon 12 Manchester city centre map 13 Conference sponsors 14 EPR @ Manchester 15 Bruker prize lecture and reception 16 JEOL student prize lectures 17 Committee of the ESR spectroscopy Group of the RSC 18 Next meeting (2013) 19 Abstracts for Talks T1‐T48 Abstracts for Posters P1‐P31 Presenting Author Index R1‐R2 Title Index R3‐R6 List of participants R7‐R14 2 Conference Programme Sunday 25th March 16.00 – 18.30 Registration Chancellors Reception 18.30 – 20.00 Dinner Chancellors Carriage Restaurant RSC Wine Reception 20.00 – 22.30 Chancellors Conservatory and bar and free bar Monday 26th March 07.30 – 08.55 Breakfast Chancellors or Luther King House or Willowbank Hotel Session 1 Chair: David Collison 08.55 – 09.00 Mark Newton Conference opening and welcome note 09.00 – 09.30 Richard Winpenny Keynote Lecture: EPR Studies of Rings and Dimers of Rings Intercluster exchange interactions and spin state switching in 09.35 – 09.50 Irina Drozdyuk copper nitroxide based molecular magnets Cu(hfac)2LR studied by EPR Quantum operations by pulsed ESR spectroscopy: Molecular 09.55 – 10.10 Shigeaki Nakazawa design for -
Curriculum Vitae
CURRICULUM VITAE William Esco (W. E.) Moerner Harry S. Mosher Professor and Professor, by courtesy, of Applied Physics Department of Chemistry and Biophysics Program Stanford University, Stanford, California 94305-5080 650-723-1727 (phone), 650-725-0259 (fax), e-mail: [email protected] Education 1975 B.S. Physics Washington University (Final Honors) St. Louis, Missouri B.S. Electrical Engineering (Final Honors) A.B. Mathematics (summa cum laude) 1978 M.S. Cornell University (Physics) Ithaca, New York 1982 Ph.D. Cornell University (Physics) Ithaca, New York Thesis Topic: Vibrational Relaxation Dynamics of an IR-Laser-Excited Molecular Impurity Mode in Alkali Halide Lattices Thesis Advisor: Professor A. J. Sievers Academic Honors 1963-82 Grade Point Average of All A's (4.0) 1971-75 Alexander S. Langsdorf Engineering Fellow, Washington University 1975 Dean's Award for Unusually Exceptional Academic Achievement 1975 Ethan A. H. Shepley Award for Outstanding Achievement (university-wide) 1975-79 National Science Foundation Graduate Fellow Career Summary 2005- Professor, by courtesy, of Applied Physics 2002- Harry S. Mosher Professor of Chemistry 1998-2002 Professor of Chemistry Department of Chemistry Stanford University Multidisciplinary education and research program on single-molecule spectroscopy and quantum optics in solids, proteins, and liquids; single-molecule biophysics; and photoactive 1 polymer materials with emphasis on photorefractive polymers. Major milestones include: first room-temperature single-molecule source of single -
A Monometallic Lanthanide Bis(Methanediide) Single Molecule Magnet with a Large Energy Barrier Cite This: Chem
Chemical Science View Article Online EDGE ARTICLE View Journal | View Issue A monometallic lanthanide bis(methanediide) single molecule magnet with a large energy barrier Cite this: Chem. Sci.,2016,7,155 and complex spin relaxation behaviour† Matthew Gregson,‡a Nicholas F. Chilton,‡a Ana-Maria Ariciu,b Floriana Tuna,b Iain F. Crowe,c William Lewis,d Alexander J. Blake,d David Collison,a Eric J. L. McInnes,b Richard E. P. Winpenny*a and Stephen T. Liddle*a We report a dysprosium(III) bis(methanediide) single molecule magnet (SMM) where stabilisation of the highly magnetic states and suppression of mixing of opposite magnetic projections is imposed by a linear arrangement of negatively-charged donor atoms supported by weak neutral donors. Treatment TMS TMS TMS 2À TMS of [Ln(BIPM )(BIPM H)] [Ln ¼ Dy, 1Dy;Y,1Y; BIPM ¼ {C(PPh2NSiMe3)2} ; BIPM H ¼ À TMS {HC(PPh2NSiMe3)2} ] with benzyl potassium/18-crown-6 ether (18C6) in THF afforded [Ln(BIPM )2] [K(18C6)(THF)2] [Ln ¼ Dy, 2Dy;Y,2Y]. AC magnetic measurements of 2Dy in zero DC field show Creative Commons Attribution 3.0 Unported Licence. temperature- and frequency-dependent SMM behaviour. Orbach relaxation dominates at high temperature, but at lower temperatures a second-order Raman process dominates. Complex 2Dy exhibits two thermally activated energy barriers (Ueff) of 721 and 813 K, the largest Ueff values for any monometallic dysprosium(III) complex. Dilution experiments confirm the molecular origin of this phenomenon. Complex 2Dy has rich magnetic dynamics; field-cooled (FC)/zero-field cooled (ZFC) susceptibility measurements show a clear divergence at 16 K, meaning the magnetic observables are out-of-equilibrium below this temperature, however the maximum in ZFC, which conventionally defines the blocking temperature, TB, is found at 10 K. -
Curriculum Vitae
Marco Flores, Ph.D. 1 School of Molecular Sciences Arizona State University 1711 South Rural Road, Tempe, AZ 85287-1604 Phone: 480-965-8456 E-mail: [email protected] EDUCATION AND TRAINING National University of Engineering, Perú B.Sc. Physics 1993 Brazilian Center for Research on Physics, Brazil M.Sc. Physics 1996 Brazilian Center for Research on Physics, Brazil Ph.D. Physics 2000 University of California, San Diego Post-Doc Biophysics 2000-2004 PROFESSIONAL APPOINTMENTS Arizona State University, Manager at the Ultrafast Laser Facility 2018-Present Arizona State University, Research Professional and Manager of the EPR Facility 2008-Present Max-Planck Institute for Bioinorganic Chemistry, Germany, EU Research Fellow 2004-2008 Brazilian Center for Research on Physics, Brazil, Visiting Scientist 2004 Private University Antenor Orrego, Perú, Teaching Assistant 1991-1993 FELLOWSHIPS AND HONORS National Science Foundation (NSF), MRI Program, Member of EPR Review Panel 2015-2017 Wolf Foundation, Israel, Special Guest to the Ceremony of the Wolf Foundation Prize 2007 European Union/Energy Network Project (SOLAR-H), Research Fellowship 2004-2008 National Institutes of Health (NIH), Postdoctoral Fellowship 2000-2004 Ministry of Education, Brazil (CAPES), Ph.D. Fellowship 1996-2000 Ministry of Education, Brazil (CAPES), M.Sc. Fellowship 1993-1996 INVITED TALKS AND ORAL PRESENTATIONS ASU Core Facilities Symposium, Tempe, AZ 2018 George Feher Memorial Symposium, La Jolla, CA 2018 XL Encontro Nacional de Física da Matéria Condensada, Armação dos Búzios, -
Photosynthesis and the Web: 2001
Photosynthesis Research 68: 1–28, 2001. 1 © 2001 Kluwer Academic Publishers. Printed in the Netherlands. Minireview Photosynthesis and the Web: 2001 Larry Orr1 & Govindjee2,∗ 1Center for the Study of Early Events in Photosynthesis, Arizona State University, Box 871604, Tempe, AZ 85287- 1604, USA; 2Departments of Biochemistry and Plant Biology and Center of Biophysics & Computational Biology, University of Illinois, Urbana, IL 61801-3707, USA; ∗Author for correspondence (e-mail: [email protected]; fax: +1-217-244-7246) Received 15 June 2001; accepted in revised form 25 June 2001 Key words: Internet, K-12 education, Mosaic, NCSA (National Center for Supercomputing Applications), World Wide Web Abstract First, a brief history of the Internet and the World Wide Web is presented. This is followed by relevant information on photosynthesis-related web sites grouped into several categories: (1) large group sites, (2) comprehensive overview sites, (3) specific subject sites, (4) individual researcher sites, (5) kindergarten through high school (K-12) educational sites, (6) books and journals, and, 7) other useful sites. A section on searching the Web is also included. Finally, we have included an appendix with all of the web sites discussed herein as well as other web sites that space did not allow. Readers are requested to send comments, corrections and additions to [email protected]. Abbreviations: ARPA – Advanced Research Projects Agency; ASU – Arizona State University; HTML – Hy- per Text Markup Language; NCSA – National Center for Supercomputing Applications; TCP/IP – Transmission Control Protocol/Internet Protocol; UIUC – University of Illinois, Urbana-Champaign; URL – Universal Resource Locator; WWW – World Wide Web Introduction Three years ago we published a short paper detailing the then current state of photosynthesis web sites and how to find them (Orr and Govindjee 1998). -
122 Structure and Bonding
122 Structure and Bonding Series Editor: D. M. P.Mingos Editorial Board: P.Day·T.J.Meyer·H.W.Roesky·J.-P.Sauvage Structure and Bonding Series Editor: D. M. P.Mingos Recently Published and Forthcoming Volumes Single-Molecule Magnets Principles and Applications and Related Phenomena of Density Functional Theory Volume Editor: Winpenny, R. in Inorganic Chemistry II Vol. 122, 2006 Volume Editors: Kaltsoyannis, N., McGrady, J. E. Non-Covalent Multi-Porphyrin Assemblies Vol. 113, 2004 Synthesis and Properties Volume Editor: Alessio, E. Principles and Applications Vol. 121, 2006 of Density Functional Theory in Inorganic Chemistry I Recent Developments in Mercury Sience Volume Editors: Volume Editor: Atwood, David A. Kaltsoyannis, N., McGrady, J. E. Vol. 120, 2006 Vol. 112, 2004 Layered Double Hydroxides Supramolecular Assembly Volume Editors: Duan, X., Evans, D. G. via Hydrogen Bonds II Vol. 119, 2005 Volume Editor: Mingos, D. M. P. Vol. 111, 2004 Semiconductor Nanocrystals and Silicate Nanoparticles Applications of Evolutionary Computation Volume Editors: Peng, X., Mingos, D. M. P. in Chemistry Vol. 118, 2005 Volume Editors: Johnston, R. L. Vol. 110, 2004 Magnetic Functions Beyond the Spin-Hamiltonian Fullerene-Based Materials Volume Editor: Mingos, D. M. P. Structures and Properties Vol. 117, 2005 Volume Editor: Prassides, K. Vol. 109, 2004 Intermolecular Forces and Clusters II VolumeEditor:Wales,D.J. Supramolecular Assembly Vol. 116, 2005 via Hydrogen Bonds I Volume Editor: Mingos, D. M. P. Intermolecular Forces and Clusters I Vol. 108, 2004 VolumeEditor:Wales,D.J. Vol. 115, 2005 Optical Spectra and Chemical Bonding in Transition Metal Complexes Superconductivity in Complex Systems Special Volume II Volume Editor: Müller, K. -
Correlating Blocking Temperatures in Single Molecule Magnets with Raman Relaxation
doi.org/10.26434/chemrxiv.7067669.v1 Correlating Blocking Temperatures in Single Molecule Magnets with Raman Relaxation Marcus J. Giansiracusa, Andreas Kostopoulos, George F. S. Whitehead, David Collison, Floriana Tuna, Richard Winpenny, Nicholas Chilton Submitted date: 10/09/2018 • Posted date: 11/09/2018 Licence: CC BY-NC-ND 4.0 Citation information: Giansiracusa, Marcus J.; Kostopoulos, Andreas; F. S. Whitehead, George; Collison, David; Tuna, Floriana; Winpenny, Richard; et al. (2018): Correlating Blocking Temperatures in Single Molecule Magnets with Raman Relaxation. ChemRxiv. Preprint. We report a six coordinate DyIII single-molecule magnet (SMM) with an energy barrier of 1110 K for thermal relaxation of magnetization. The sample shows no retention of magnetization even at 2 K and this led us to find a good correlation between the blocking temperature and the Raman relaxation regime for SMMs. The key parameter is the relaxation time (ᵰ ) at the point where switch the Raman relaxation mechanism becomes more important than Orbach. File list (1) Dy-mon_final_for ChemRxiv.pdf (1.77 MiB) view on ChemRxiv download file Correlating Blocking Temperatures in Single Molecule Magnets with Raman Relaxation Marcus J. Giansiracusa, Susan Al-Badran, Andreas K. Kostopoulos, George F. S. Whitehead, David Collison, Floriana Tuna, Richard E. P. Winpenny*, and Nicholas F. Chilton* Dedications Abstract: We report a six coordinate DyIII single-molecule magnet length to the anionic DiMeQ oxygen donors at 2.150(4) Å. The (SMM) with an energy barrier of 1110 K for thermal relaxation of trans equatorial Dy-Cl bonds are 2.681(2) Å, and the third Cl magnetization. The sample shows no retention of magnetization even ligand trans to the neutral water ligand (2.32(1) Å) has a bond at 2 K and this led us to find a good correlation between the blocking length of 2.897(8) Å. -
James Walsh Postdoctoral Fellow Department of Chemistry
James Walsh Postdoctoral Fellow Department of Chemistry Northwestern University Evanston, IL 60208 phone: (847) 491-4356 email: [email protected] Current Position Assistant Professor, Department of Chemistry, University of Massachusetts Amherst (Sep 2019) Postdoctoral Fellow, Department of Chemistry, Northwestern University (2015 – Present) Advisors: Prof. Danna Freedman and Prof. Steven Jacobsen Background Postdoctoral Fellow, Aarhus University (2015) Advisor: Dr. Jacob Overgaard Ph.D. in Inorganic Chemistry, University of Manchester (2010 – 2014) Advisors: Prof. David Collison, Prof. Eric McInnes, Prof. Richard Winpenny Master’s in Chemistry, University of Manchester (2006 – 2010) Honors International Institute for Nanotechnology Outstanding Researcher Award (2017) Activities and Interests My research interests center on the use of extremely high pressure for the synthesis of completely new structures and chemical bonds. More broadly, I am interested in the use of X-ray crystallography as a tool to examine reaction mechanism in solid-state chemistry. I am a frequent user of the HPCAT and GSECARS beamlines at the APS. I collaborate closely with beamline scientists across both sectors and have averaged 8 shifts each run over the last four years. The APS is a world leader in the field of high pressure and is the source of many of the cutting-edge techniques that have since been adopted by other beamlines. This trend of origination is set to continue with the upgrade, which will position the APS at the forefront of synchrotron radiation science. The enormous increase in flux will make it the flagship of a new generation of experiments that allow for crystallographic access to unprecedented ultrafast timescales. -
General Kofi A. Annan the United Nations United Nations Plaza
MASSACHUSETTS INSTITUTE OF TECHNOLOGY DEPARTMENT OF PHYSICS CAMBRIDGE, MASSACHUSETTS O2 1 39 October 10, 1997 HENRY W. KENDALL ROOM 2.4-51 4 (617) 253-7584 JULIUS A. STRATTON PROFESSOR OF PHYSICS Secretary- General Kofi A. Annan The United Nations United Nations Plaza . ..\ U New York City NY Dear Mr. Secretary-General: I have received your letter of October 1 , which you sent to me and my fellow Nobel laureates, inquiring whetHeTrwould, from time to time, provide advice and ideas so as to aid your organization in becoming more effective and responsive in its global tasks. I am grateful to be asked to support you and the United Nations for the contributions you can make to resolving the problems that now face the world are great ones. I would be pleased to help in whatever ways that I can. ~~ I have been involved in many of the issues that you deal with for many years, both as Chairman of the Union of Concerne., Scientists and, more recently, as an advisor to the World Bank. On several occasions I have participated in or initiated activities that brought together numbers of Nobel laureates to lend their voices in support of important international changes. -* . I include several examples of such activities: copies of documents, stemming from the . r work, that set out our views. I initiated the World Bank and the Union of Concerned Scientists' examples but responded to President Clinton's Round Table initiative. Again, my appreciation for your request;' I look forward to opportunities to contribute usefully. Sincerely yours ; Henry; W.