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Crystal data and structure refinement

n-Type Metallocene Dopants for Organic Thin-Film Transistors and Other Applications Evgheni Jucov, Siyuan Zhang, Benjamin D. Naab , Zhenan Bao, Marina Fonari , Stephen Barlow, Seth R. Marder , Tatiana V. Timofeeva NMHU, DMR 0934212.

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Crystal data and structure refinement

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  1. n-Type Metallocene Dopants for Organic Thin-Film Transistors and Other ApplicationsEvgheni Jucov, SiyuanZhang, Benjamin D. Naab, ZhenanBao, Marina Fonari, Stephen Barlow, Seth R. Marder, Tatiana V. Timofeeva NMHU, DMR 0934212 The promise of low-cost processing and flexible circuitry has driven intense research in carbon-based electronics. The performance of carbon-based materials can be effectively tuned by the application of redox reagents dopants, through increasing the conductivity and decreasing the injection barrier. Two ferrocene and two ruthenocene substituted compounds (1-4) were investigated with X-ray single crystal analysis. These compounds represent a series of new benzimidazole-based n-type dopants, which can be used to dope a variety of semiconductors for organic thin-film transistors (OTFTs) and other applications. They react (faster than similar air-stable organic dopants) with a variety of electron-transport materials, including fullerenes and perylene diimides, to form the corresponding radical anions and monomeric benzimidazolium cations. Studied compounds are proved to be effective dopants for a variety of vapor- and solution-processed materials. Crystal data and structure refinement 1 3 4 2 Structures of 1-4

  2. Studies of the MOFs and Charge Transfer MaterialsCarlos Ordonez, Raul Castaneda, Dr. Marina Fonari, Dr. Qiang Wei, Dr. Tatiana TimofeevaNMHU, DMR 0934212 At NMHU under supervision of Prof. Wei (Ordonez, Fonari) a series of anionic MOFs {Zn-BTC}{Cations} with tunable fluorescence controlled by the counter cations was synthesized and studied. All MOFs with anionic frameworks are constructed from Zn2+ with 1,3,5-benzenetricarboxylate (BTC) organic anions. Cations include NH4+, MeNH3+, Me2NH2+, Et2NH2+, n-Bu2NH2+, n-Bu4N+, BzMe3N+, Me4N+, and 1-Butyl-3-methylimidazolium (BMIM). The influence of various counter cations on the structural changes of the anionic Zn-BTC connections in the frameworks, and on the fluorescence of the corresponding MOFs was examined. It was observed that cations are acting as structure-directing agents affecting the type of coordination in the anionic frameworks. Series of potential charge-transfer materials containing donor and acceptor molecules in one crystal was synthesized and studied using X-ray diffraction analysis. Stacks of molecules found in crystals support their charge-transfer properties. {Zn-BTC}{Cations} MOFs structure changes from 1D chain to 2D layer, and to 3D frameworks Molecular packing in adducts presented in figure to the left Hg3- red, TTF-yellow, solvent-green. Dependence of fluorescence characteristics of MOFs dimensionality. Ratio of components and crystal shape for Hg3-TTF adducts.

  3. Presentations for Las Vegas High School Students (MESA Event)April 7, 2014, NMHU, Las Vegas, NMEvgheni Jucov, Erika Guaba, Carlos Ordonez, Raul Castaneda, Marie OhoueuNMHU, DMR 0934212 Laboratory tour and presentations on materials science and solar cells development was carried out at New Mexico Highlands University for students from Las Vegas high schools. The presentation explained to local students why solar energy is an important source of renewable energy in New Mexico and how materials studies can impact solar cells development. Students at crystallography lab Students at organic chemistry lab Group picture Demonstration of unmanned aircraft at physics lab

  4. PREM GRADUATES 2009-2015

  5. Electron-Transport Materials - Merocyanines Challenge - intermolecular dye-dye interactions lead to aggregation that adversely affects the third-order nonlinear optical properties in high-chromophoredensity films Strategy - the oxidative addition of halogen-functionalized dyes to Pt(PPh3)4 to modify the molecular shape(Marder group, GA Tech) Result - bulky Pt(PPh3)2Hal groups in the “bay” positions of perylene diimides (PDIs) prevent aggregation, and thus the PDIs were found to show favorable molecular-level properties Chemical and crystal structure of a perylenediimide (PDI) with bulky organoplatinumsubstituents(Timofeeva group, NMHU)

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