Arizona State University, USA
The emergence of many new fabrication methodologies in the past 20 years has given rise to a plethora of ceramic nano-materials with exotic new properties that are clearly distinguished from the same materials produced by traditional, bulk processes. Nearly all are attributed to nanoscaled complex physical structures that evolve through some sort of starkly nonequilibrium, high driving force process that cannot be contained in one-dimensional action. A common thread to all of these processes is that they take place at low temperatures, where the chemical, electrical and mechanical driving forces are seemly enhanced. Common relationships between reactions driven at low temperature and morphology are examined for several very different cases carried out in our laboratory. These include (i) the electrochemical etching of titania nanotubes used for chemical sensor platforms, (ii) the growth of semiconducting silicon nanowires in plasma-emersion CVD, (iii) the aqueous deposition of nano-ferrite thick films where the magnetic domains are decoupled from the physical nanostructure, and (iv) the simultaneous formation and self-assemblage of magnetic nanoparticles into 1D, 2D and 3D superstructures at the micron scale.
Biography:
William T. Petuskey is Professor in the School of Molecular Science at Arizona State University and Director of ASUʼs Advanced Materials Initiative. He received his Sc.D. in materials science at the Massachusetts Institute of Technology. He served as chairman of ASUʼs Department of Chemistry and Biochemistry and Associate Vice President of Science, Engineering and Technology (in the universityʼs central research office of Knowledge Enterprise Development). His research activities are devoted to the synthesis and physical chemistry of nano-scaled ceramics, and enabling ASUʼs materials research community through strategic teaming, infrastructure development and operational analytics.
Department of Organic Chemistry, University of Lodz, Poland
We have studied reactions of different allyltin compounds with 4-phenyl-1,2,4-triazoline-3,5-dione, diethyl azodicarboxylate and singlet oxygen in diethyl ether in the absence and presence of LiClO4. A strong catalytic effect of lithium perchlorate has been observed.
We have also carried out the analogous studies with organotin phenoxides.
The use of stannylation of phenols enhances their reactivity towards electrophiles such as DEAD, bis(trichloroethyl) azodicarboxylate and ethyl propiolate.
The tri-n-butyltin phenoxides can be easily prepared by azeotropic dehydration of a mixture of phenol and bis(tri-n-butyltin oxide) in toluene. They react at room temperature with both azodicarboxylates to produce para-subsituted phenolic hydrazides in high yields. Whereas, their reaction at room temperature with ethyl propiolate gives either the derivatives of 3-phenoxyacrylic acid ethyl ester or 3-(2-hydroxyphenyl)acrylic acid ethyl ester. We have carried out the comparative studies of amination and vinylation of different phenols catalysed by LiClO4, SnCl4 and Et3N. We have also studied the mechanisms of these reactions.
Biography:
Wojciech Kinart was born on the 17th of May 1953 in Lodz. He graduated from the University of Lodz in 1977. On the 17th of April 1980, he was awarded the Ph.D Degree in Chemistry. In 1996 he was awarded the habilitation degree in Chemistry at the University of Lodz. He was the author of 120 papers, two chapters in Comprehensive Heterocyclic Chemistry III, Oxford, 2008; and one chapter in Tin Chemistry: Fundamentals, Frontiers and Applications, Wiley, 2008. Research areas of his interest include: organometallic chemistry, organic and organometallic peroxides, ene reaction and metalloene reaction, physicochemical studies of equilibria in liquid solvent mixtures.
Iowa State University, USA
Identifying scalable, sustainable pathways to chemicals is a key goal. The NSF-funded Center for biorenewable Chemicals is focused on the interplay between biocatalysis and chemical catalysis. One of the key research thrusts is the production of pyrones from glucose and the conversion of these pyrones into both existing chemicals (drop-in chemicals) and new chemicals with improved functionality. Triacetic acid lactone and coumalic acid are two pyrones that have been extensively studied in this Center, both from their production from glucose and from their emergence as platform chemicals for the production of new compounds. Triacetic acid lactone has been converted into alkylated and acylated derivatives. One of the acylated derivatives, pogostone, has antifungal and insecticidal activity. Significantly, certain analogs of pogostone have much better biological activity. Coumalic acid has been converted into a variety of aromatic acids, some of which function as preservatives, plasticizers or antimicrobials.
Biography:
Dr. George Kraus received a B.S. degree in chemistry from the University of Rochester in 1972 and a Ph.D. degree in chemistry from Columbia University in 1976. He went to Iowa State University where he is now a University Professor of Chemistry. Dr. Kraus has authored over 320 publications. He became an AAAS Fellow in 2009 and was elected as a Fellow of the Royal Society of Chemistry in 2013. His research interests include the development of green chemistry methods and the chemistry of bio based products. He is active in the NSF Engineering Research Center for Bio renewable Chemicals.
Arizona State University, USA
Our work is centered on metal oxide nanotubes and i will present our work on Titania nanotubes, TiNT, synthesized by the anodic oxidation of Titanium. We have made several metal ions derivatives by reacting freshly prepared TiNT with up to 60% hydroxyl groups with differing amount of metal acetates. Zinc ion substituted TiNT, TiNT-Zn for example complexes with peroxide explosives such as Triacetone triperoxide, TATP resulting in a drastic change in electric conductance of the nanotubes which has been utilized in designing a solid state nanotube sensor. To overcome the reaction of water and saline vapor, we developed Nano coating of silicon oxynitride on TiNT-Zn. We have also studied the depth profile of Zn in the nanotube by Nano-SIM.
Biography:
Dr. Indu B Mishra has a Ph.D in Chemistry and Engineering from the University of Southern California. His graduate dissertation was Chemistry of Pentaborane under the guidance of late Professor Anton B Burg. Over the years he has worked on separation of uranium from vanadium, organotin compounds and metallocarboranes as combustion catalysts, polymers as fuels for solid propellants, azides and tetrazoles as inflators for airbags culminating in study of metal oxide nanotubes. Dr. Mishra has been a professor in India, Brazil and Howard & Johns Hopkins universities in the USA. He has worked in private industry as a research scientist for Talley industries of Arizona and Olin Corporation.
Uppsala University, Sweden
Diamond is a widely known material for its many excellent properties. A B-doped diamond is an excellent p-type material for solar cell usage. It is considered as one of the strongest candidates for photovoltic electric generation. In the present investigation, the adsorption of different dye molecules onto H-terminated diamond (111) surfaces have been theoretically studied using Density Functional Theory (DFT) calculations. The diamond surfaces were B-doped in order to make them p-type semi-conducting. The choice of dyes was based on the match between the electronic structures of these H-terminated B-doped diamond surfaces and the respective dye molecules. The dye molecules in the present study include C26H13NO3S4(A), C35H37NO2S3(B), C34H38OS2(C), C32H36OS2(D) and C31H35S3Br(E).The main goal with the present study was thereby to investigate and compare the photovoltaic efficiency of the various dyes when attached to B-doped and H-terminated diamond surfaces. The calculated absortion spectra in principle of the different dyes were shown to be located in the most intense part of the sunlight spectrum. The usage of a combination of these different dyes would hence, be an optimal choice in order to improve the light harvesting in a photovoltaic process.
Biography:
Karin Larsson is a Professor in Inorganic Chemistry at the Department of Materials Chemistry, Uppsala University, Sweden. She received a PhD in Chemistry in 1988. The research was directed towards investigation of molecular dynamic processes in solid hydrates by using solid state NMR spectroscopy. The scientific focus is on interpretation, understanding and prediction of the following processes/properties for both solid/gas interfaces, as well as for solid/liquid interfaces; i)CVD growth, ii)interfacial processes for renewable energy applications and iii)interfacial processes for e.g. bone regeneration (incl. biofunctionalisation of surfaces).
Department of Chemistry, Sungkyunkwan University, South Korea
A tuning of the energy band gap of semicondunding metarials including transition metal chalcogenides (TMCs) including TiO2, MoS2, and CoS2 have been paid attention for energy conversion and environmental issues. Here in we like to introduce new findings about the visible-light driven blue TiO2 materials for photo-catalytic hydrogen evolving reaction (HER) and for a removal of algae from water. In addition, we like to report new layered ternary transition metal chalcogenides (TTMCs) material to overcome to the limitation of active sites which is challenging in binary transition metal chalcogenides (BTMC) such as MoS2 towards electrochemical hydrogen production. We carefully designed the TTMC materials that contain two transition metals Cu and Mo with chalcogen S. The TTMC, Cu2MoS4 has been successfully synthesized by a facile solution-processed method. Moreover, by anion doping such as Se in as the synthesized Cu2MoS4, it has been found that TTMC can be exfoliated into single layer nanosheets. Furthermore, by controlling the number of layers, single layers TTMC exhibit the highest electrocatalytic activity towards HER because the single layers can provide more catalytic active sites than multilayers and bulk. As a result, our TTMC work can guide new strategy for the developments of applications of TMCs in HER. Finally, we like to demonstrate new strategy to satisfy all requirements for the development of a highly active and remarkably durable HER electrocatalyst in both acidic and alkaline media via anion-cation double substitution into a CoS2 moiety for preparing 3D mesoporous pyrite-metal vanadium-cobalt phosphorsulphide (Co1-xVxSP).
Biography:
Prof. Hyoyoung Lee has completed his PhD at Department of Chemistry, University of Mississippi, USA in 1997. He did his postdoctoral studies at North Carolina State University. He worked at Electronics and Telecommunications Research Institute and then moved to Dept. of chemistry, Sungkyunkwan University as a full professor. He served as a director of National Creative Research Initiatives. Currently, he has served as an associate director of Centre for Integrated Nanostructure Physics, Institute of Basic Science. His current research area is low energy band gap 0-2D semiconducting materials. He has written more than 141 journal articles with top-tier journals.
School of Chemistry, Shanghai Jiao Tong University, China
Carbon-based materials have great potential in application for energy storage and conversion because of their low cost, high stability and rich microstructure features. A series of carbon-based materials, represented by g-C3N4 and graphene composites have been prepared and employed as catalysts for hydrogen abstraction from organic molecules and for electro catalytic splitting of water. Metal nanoparticles and semiconductor supports have been integrated to form efficient catalysts for hydrogen evolution reactions. We have investigated in detail the microscopic structures, the active sites and the transport efficiencies for matter and electrons of the carbon-based materials.
Biography:
Professor Jie-Sheng Chen received his PhD degree from Jilin University in 1989 and worked as a postdoctoral fellow in the Royal Institution of Great Britain, the United Kingdom from 1990 to 1994 and as a professor in the Department of Chemistry, Jilin University from 1994 to 2008. Since 2008, he has been a professor in the School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University. His research interest is the synthesis of solid compounds and composite materials with new structures and functions.
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