ACS Division of Inorganic Chemistry
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Catechol-Cation Synergy in Wet Adhesive Materials
UNIVERSITY OF CALIFORNIA Santa Barbara CATECHOL-CATION SYNERGY IN WET ADHESIVE MATERIALS A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Chemistry by Gregory Peter Maier Committee in charge: Professor Alison Butler Professor J. Herbert Waite Professor R. Daniel Little Professor Song-I Han September 2017 The dissertation of Gregory Peter Maier is approved: ____________________________________________________________ J. Herbert Waite ____________________________________________________________ R. Daniel Little ____________________________________________________________ Song-I Han ____________________________________________________________ Alison Butler, Committee Chair August 2017 Catechol-Cation Synergy in Wet Adhesive Materials Copyright © 2017 By Gregory Peter Maier iii ACKNOWLEDGEMENTS My experience in graduate school has had a profound impact on me both personally and professionally. I would like to thank my advisor, Professor Alison Butler, for guiding me through this transformative process. Her support, dedication, and encouragement were unwavering and I consider myself lucky to have been a part of her research group. I would also like to thank my committee members Songi Han, Dan Little, and especially Herb Waite for their guidance in my research. I’ve been lucky to have been involved in several fulfilling collaborations. Mike Rapp from Jacob Israelachvili’s lab at UC Santa Barbara and I have been partners in research for the majority of my time in graduate school and much of this dissertation would not have been possible without him. Additionally, my current and former group members helped make a positive, fun, and engaging work environment. In particular, Robert Lewis has always been helpful with organic synthesis advise and has always been a great friend. Thank you to my family for guiding me to where I am today and to my amazing girlfriend Kate Hawley and friend Johnny Kessenich, whose willingness to move to Santa Barbara has truly made the last 5 years some of the best in my life. -
Crisis and Community
Crisis and Community 2020 Annual Report A “I am so thankful that I’m part of a group of people that cares so much about the thoughtful mentoring and education of the next generations of scientists. These are my people.” Cottrell Scholar “It was particularly hard during the pandemic to get in touch with fellow scientists, and I only recognized during the Scialog meeting how much I was missing these interactions. Thanks for making this possible.” Scialog: Negative Emissions Science Fellow B Letter from the President Along with the terrible losses and disruptions of the impact of the pandemic. In response to their We recognize that a return to “normal” will be 2020 came evidence for optimism about human concerns about keeping scientific careers on track neither rapid nor easy. Our support and programs resilience, scientific innovation, and the power at a time when most universities and colleges will continue to focus on basic research in the of partnerships. The community of teacher- severely cut back their faculty hiring plans, we physical sciences, while also paying close attention scholars that the Research Corporation for Science joined with the National Science Foundation to to how we can help improve the lives and careers of Advancement supports adapted to teaching online offer fellowships to senior postdoctoral fellows who faculty in the sciences at universities, colleges, and and to guiding their research groups remotely; in a non-pandemic year would have expected to be research institutes. Please be in touch with your long-term investigations were put on hold as launching independent research programs. -
Iridium Corroles: Synthesis, Properties, and Electronic Structure
IRIDIUM CORROLES: SYNTHESIS, PROPERTIES, AND ELECTRONIC STRUCTURE Thesis by Joshua Palmer In Partial Fulfillment of the Requirements for the degree of Ph. D., Chemistry CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, California 2011 (Defended February 11, 2011) ii 2011 Joshua Palmer All Rights Reserved iii ACKNOWLEDGEMENTS My graduate school experience was something of a festival of collaboration, so there are a great many people to thank for the existence of this thesis. First of all, I have to thank my advisor, Harry Gray, who rolled the dice on me when he barely had space and then let me do almost anything I wanted with my time in his lab. Harry has been a boon and an inspiration to generations of chemists young and old, and I’m proud to count myself among them. I also have to thank my thesis committee: John Bercaw, Brian Stoltz, and Jonas Peters. We didn’t meet very often, but I always got valuable scientific advice from them when we did. Additionally, I would like to acknowledge the aid of Zeev Gross, a professor at the Technion in Haifa, who initially got me interested in corroles and who always has time to discuss an idea, even if it’s just by e-mail. I also have to thank Jay Winkler, director of the Beckman Institute Laser Resource Center, who allowed me to utilize a broad array of extremely expensive laser instruments during my time at Caltech and even purchased one custom-made item for a set of experiments I wanted to perform. I’d like to acknowledge the ongoing influence of my wonderful undergraduate advisor, David I. -
Company Update Company
October 30, 2017 OUTPERFORM Indorama Ventures (IVL TB) Share Price: Bt45.75 Target Price: Bt55.0 (+20.2%) Company Update Company Ready to take it all . 65% of newly acquired BOPET is HVA, underscoring healthy EBITDA margins in FY18F onward . M&G’s bankruptcy is an opportunity for IVL to gain more market share in North America . OUTPERFORM, raised TP to Bt55/sh; share price weakness upon weak 3Q17 results is an opportunity to buy IVL could become a major player of BOPET Early this month, IVL signed a share purchase agreement with DuPont Teijin Films (DTF) to acquire 100% stake in their PET film business. This marks an important step for IVL to diversify into PET film used in packaging, industrial, electrical, imaging, and magnetic media. 65% of Naphat CHANTARASEREKUL DTF’s products is ‘thick’ film, which commands the same EBITDA 662 - 659 7000 ext 5000 margin as IVL’s HVA portfolio of automotive and hygiene products. DTF [email protected] COMPANY RESEARCH | RESEARCH COMPANY is a leading producer of biaxially oriented Polyethylene Terephthalate (BOPET) and Polyethylene Naphthalate (PEN). Their business Key Data comprises of eight production assets in the US, Europe, and China with 12-mth High/Low (Bt) 46.5 / 28.25 global innovation center in UK with annual capacity of 277k tons. PET Market capital (Btm/US$m) 239,957/ 7,205 film uses the same feedstock as PET but the market is small at 4.1m ton 3m avg Turnover (Btm/US$m) 747.8 / 22.5 consumption p.a. We are optimistic IVL could become a major player in Free Float (%) 29.5 this market. -
1 DANIELA R. RADU, Ph.D
DANIELA R. RADU, Ph.D. Associate Professor, Mechanical and Materials Engineering, College of Engineering and Computing Florida International University, 10555 West Flagler Street, Miami, FL 33174 Tel. (O): (305) 348-4506 | Email: [email protected] EDUCATION Ph.D. in Chemistry (2004) Iowa State University, Ames, IA, USA Advisor: Professor Victor S.-Y. Lin M.S. in Chemistry (1996) “Babes-Bolyai” University, Cluj-Napoca, Romania Advisor: Professor Paul S. Agachi B.S. in Chemical Engineering (1994) “Babes-Bolyai” University, Cluj-Napoca, Romania Thesis Advisor: Professor Paul S. Agachi PROFESSIONAL EXPERIENCE Associate Professor with Tenure Department of Mechanical and Materials Engineering Florida International University, Miami, FL 33174 August 2018 – Present Associate Dean College of Mathematics, Natural Sciences and Technology January 2018 – July 2018 Delaware State University, Dover, DE Associate Professor with Tenure Department of Chemistry, Delaware State University, Dover, DE August 2017 – July 2018 Affiliated Professor Department of Materials Science and Engineering, University of Delaware October 2015 – Present Newark, DE Assistant Professor, Tenure-Track Department of Chemistry, Delaware State University, Dover, DE January 2013 – July2017 Senior Research Scientist DuPont CR&D, Experimental Station, Wilmington, DE August 2010 – December 2012 Research Scientist DuPont Central Research and Development, Experimental Station October 2007 – July 2010 Wilmington, DE Postdoctoral Research Fellow The Scripps Research Institute, La Jolla, CA -
Our Choice from the Recent Literature
research highlights OPTICAL CLOAKING layer that increases the overall reflectivity of rather than by the Stark effect. It is, in A phase compensation trick their metasurface. This design, which can in fact, known that in charged nanocrystals, Science 349, 1310–1314 (2015) principle be scaled up, works for incoming the recombination of electrons and holes light within 30° angles with respect to the happens primarily through a non-radiative perpendicular direction. AM phenomenon known as the Auger effect. Delehanty and colleagues also simulated NANOCRYSTALS a realistic neuron firing event by applying Getting on your nerves to the device an electric voltage pulse Nano Lett. 15, 6848–6854 (2015) recorded independently from a murine cortical neuron. The intensity of the Semiconductor nanocrystals could luminescence followed the voltage profile potentially be used to study the electrical accurately, with a total variation of up to 5% activity of neurons by monitoring their in luminescence. FP luminescence during a firing event. The basic principle is that an electric field affects CONTRAST AGENTS AAAS the spatial separation of electrons and holes Nanobubbles that don’t pop in nanocrystals (a phenomenon known as Angew. Chem. Int. Ed. http://doi.org/f3ggns (2015) A cloak is a device that makes objects the quantum confined Stark effect) and, invisible to an external observer. The first therefore, affects the time it takes for these Microbubbles, which are typically made cloaks that could work with visible light charges to recombine and ultimately the up of a lipid or protein shell and contain air used bulky containers with special optical intensity of the luminescence emitted. -
Goessmann, Lindsey, Chamberlain, Peters, and Mcewen, Research Symposium
GOE SSMANNgazette A Publication of the Chemistry Department University of Massachusetts Amherst www.chem.umass.edu VOLUME 44 – SPRING 2015 INSIDE Alumni News ............................2 by David Adams Points of Pride ...........................4 Chemistry Loses a Dear Friend Lab Notes .................................5 Dissertation Seminars .............21 On April 14th one of the towering figures of the Chemistry Seminar Program ....................20 Department, Professor George R. Richason, Jr. passed away Senior Awards Dinner .............22 at Cooley Dickinson Hospital in Northampton. Alongside Degrees Awarded ...................22 Goessmann, Lindsey, Chamberlain, Peters, and McEwen, Research Symposium ..............23 George takes his place among the chemists who shaped Friends of Chemistry ...............26 and propelled the department to national and international Letter from Head ....................28 quality and recognition. In George’s case, he was part of EVENTS for 2015 the Chemistry Department for 82 of its 146 year history! His contributions to the department and the university Five College Seminar were profound, widespread, and legendary. In many Prof. Phil Baran Scripps Institute respects he truly was “Mr. UMass.” March 10, 2015 In the early 1930s, George, born in the Riverside Marvin Rausch Lectureship Prof. Karl Wieghardt section of Turner’s Falls on April 3, 1916, participated in Max-Planck-Institut-Mülheim basketball tournaments on the Amherst campus of the then April 9, 2015 Massachusetts Agricultural College (MAC). MAC became Senior Awards Dinner Massachusetts State College in 1931, and George April 29, 2015 matriculated at MSC in the fall of 1933. Early in his undergraduate career the basketball coach Getting to Know Our Newest Alumni Reunion 2015 June 6, 2015 encouraged him to join the State basketball team Faculty Members after watching him play in Curry Hicks Cage. -
Impact of Molecular Architecture and Adsorption Density on Adhesion of Mussel-Inspired Surface Primers with Catechol-Cation Synergy † ‡ ‡ † § George D
Article Cite This: J. Am. Chem. Soc. 2019, 141, 18673−18681 pubs.acs.org/JACS Impact of Molecular Architecture and Adsorption Density on Adhesion of Mussel-Inspired Surface Primers with Catechol-Cation Synergy † ‡ ‡ † § George D. Degen, Parker R. Stow, Robert B. Lewis, Roberto C. Andresen Eguiluz, Eric Valois, † ‡ ⊥ † ∥ Kai Kristiansen, Alison Butler,*, and Jacob N. Israelachvili , , † ‡ § Department of Chemical Engineering, Department of Chemistry and Biochemistry, Biomolecular Science and Engineering, and ∥ Materials Department, University of California, Santa Barbara, California 93106, United States *S Supporting Information ABSTRACT: Marine mussels secrete proteins rich in residues containing catechols and cationic amines that displace hydration layers and adhere to charged surfaces under water via a cooperative binding effect known as catechol-cation synergy. Mussel-inspired adhesives containing paired catechol and cationic functionalities are a promising class of materials for biomedical applications, but few studies address the molecular adhesion mechanism(s) of these materials. To determine whether intramolecular adjacency of these functionalities is necessary for robust adhesion, a suite of siderophore analog surface primers was synthesized with systematic variations in intramolecular spacing between catechol and cationic functionalities. Adhesion measurements conducted with a surface forces apparatus (SFA) allow adhesive failure to be distinguished from cohesive failure and show that the failure mode depends critically on the siderophore analog adsorption density. The adhesion of these molecules to muscovite mica in an aqueous electrolyte solution demonstrates that direct intramolecular adjacency of catechol and cationic functionalities is not necessary for synergistic binding. However, we show that increasing the catechol-cation spacing by incorporating nonbinding domains results in decreased adhesion, which we attribute to a decrease in the density of catechol functionalities. -
“Highly Crystalline Multimetallic Nanoframes with Three
Highly Crystalline Multimetallic Nanoframes with Three-Dimensional Electrocatalytic Surfaces Chen Chen et al. Science 343, 1339 (2014); DOI: 10.1126/science.1249061 This copy is for your personal, non-commercial use only. If you wish to distribute this article to others, you can order high-quality copies for your colleagues, clients, or customers by clicking here. Permission to republish or repurpose articles or portions of articles can be obtained by following the guidelines here. The following resources related to this article are available online at www.sciencemag.org (this information is current as of June 10, 2014 ): Updated information and services, including high-resolution figures, can be found in the online on June 10, 2014 version of this article at: http://www.sciencemag.org/content/343/6177/1339.full.html Supporting Online Material can be found at: http://www.sciencemag.org/content/suppl/2014/02/26/science.1249061.DC1.html A list of selected additional articles on the Science Web sites related to this article can be found at: http://www.sciencemag.org/content/343/6177/1339.full.html#related www.sciencemag.org This article cites 38 articles, 9 of which can be accessed free: http://www.sciencemag.org/content/343/6177/1339.full.html#ref-list-1 This article has been cited by 1 articles hosted by HighWire Press; see: http://www.sciencemag.org/content/343/6177/1339.full.html#related-urls This article appears in the following subject collections: Chemistry http://www.sciencemag.org/cgi/collection/chemistry Downloaded from Science (print ISSN 0036-8075; online ISSN 1095-9203) is published weekly, except the last week in December, by the American Association for the Advancement of Science, 1200 New York Avenue NW, Washington, DC 20005. -
Rational Ligand Design for U(VI) and Pu(IV)* by Géza Szigethy BA
Rational Ligand Design for U(VI) and Pu(IV)* by Géza Szigethy B.A. (Princeton University), 2004 A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Chemistry in the Graduate Division of the University of California, Berkeley Committee in charge: Professor Kenneth N. Raymond, Chair Professor Richard A. Andersen Professor Garrison Sposito Fall 2009 * This research and the ALS are supported by the Director, Office of Science, Office of Basic Energy Sciences (OBES), and the OBES Division of Chemical Sciences, Geosciences, and Biosciences of the U.S. Department of Energy at LBNL under Contract No. DE-AC02- 05CH11231. Rational Ligand Design for U(VI) and Pu(IV) by Géza Szigethy B.A. (Princeton University), 2004 A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Chemistry in the Graduate Division of the University of California, Berkeley Committee in charge: Professor Kenneth N. Raymond, Chair Professor Richard A. Andersen Professor Garrison Sposito Fall 2009 Rational Ligand Design for U(VI) and Pu(IV) Copyright © 2009 Géza Szigethy Abstract Rational Ligand Design for U(VI) and Pu(IV) by Géza Szigethy Doctor of Philosophy in Chemistry University of California, Berkeley Professor Kenneth N. Raymond, Chair Nuclear power is an attractive alternative to hydrocarbon-based energy production at a time when moving away from carbon-producing processes is widely accepted as a significant developmental need. Hence, the radioactive actinide power sources for this industry are necessarily becoming more widespread, which is accompanied by the increased risk of exposure to both biological and environmental systems. -
2 0 0 1 a N N U a L R E P O
2001 ANNUAL REPORT DuPont at 200 In 2002, DuPont celebrates its 200th anniversary. The company that began as a small, family firm on the banks of Delaware’s Brandywine River is today a global enterprise operating in 70 countries around the world. From a manufacturer of one main product – black powder for guns and blasting – DuPont grew through a remarkable series of scientific leaps into a supplier of some of the world’s most advanced materials, services and technologies. Much of what we take for granted in the look, feel, and utility of modern life was brought to the marketplace as a result of DuPont discoveries, the genius of DuPont scientists and engineers, and the hard work of DuPont employees in plants and offices, year in and year out. Along the way, there have been some exceptional constants. The company’s core values of safety, health and the environment, ethics, and respect for people have evolved to meet the challenges and opportunities of each era, but as they are lived today they would be easily recognizable to our founder. The central role of science as the means for gaining competitive advantage and creating value for customers and shareholders has been consistent. It would be familiar to any employee plucked at random from any decade of the company’s existence. Yet nothing has contributed more to the success of DuPont than its ability to transform itself in order to grow. Whether moving into high explosives in the latter 19th century, into chemicals and polymers in the 20th century, or into biotechnology and other integrated sciences today, DuPont has always embraced change as a means to grow. -
Wilmington Serving the Greater Delaware Valley • for Adults 50 and Older •
5827OsherWilmCat_S16_Layout 1 12/2/15 9:09 AM Page 1 SPRING 2016 | February 8 – May 13 Wilmington Serving the greater Delaware Valley • For adults 50 and older • Reignite your passion for learning Everyday Guide Japanese Chat Room Sea Coasts 14 to Wine 27 31 www.lifelonglearning.udel.edu/wilm 5827OsherWilmCat_S16_Layout 1 12/2/15 9:09 AM Page 2 5827OsherWilmCat_S16_Layout 1 12/2/15 9:09 AM Page 3 Osher Lifelong Learning Institute at the University of Delaware in Wilmington Quick Reference Membership Registration ........................................51, 53 Refunds ........................................................11 Membership Benefits................................3 Volunteering................................15, 52, 54 Gifts................................................................21 About us Council............................................................2 Committees ..................................................2 Staff ..................................................................2 About Lifelong Learning Where we’re located The Osher Lifelong Learning Institute at the University of Delaware in Wilmington is a membership organization for adults 50 and over to enjoy classes, teach, Directions....................................................56 exchange ideas and travel together. The program provides opportunities for intellectual development, cultural stimulation, personal growth and social interaction Parking ..................................................55, 56 in an academic cooperative run by its members,