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New Liquid Crystalline Materials for Electrooptical and Sensory Applications

New Liquid Crystalline Materials for Electrooptical and Sensory Applications Piotr Kaszynski, Vanderbilt University, DMR 0606317 http://www.vanderbilt.edu/AnS/Chemistry/omrg/.

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New Liquid Crystalline Materials for Electrooptical and Sensory Applications

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  1. New Liquid Crystalline Materials for Electrooptical and Sensory Applications Piotr Kaszynski, Vanderbilt University, DMR 0606317 http://www.vanderbilt.edu/AnS/Chemistry/omrg/ Boron clusters are fascinating inorganic ring systems for structural elements in liquid crystals designed for electrooptical and sensory applications, and also for the study of fundamental aspects of the liquid crystal phenomenon. This multidisciplinary program is directed at understanding behavior of rationally-designed liquid crystalline materials in the presence of external stimuli, such as electric fields and radiation. An integral part of the project is the development of new materials. Relying on quantum-mechanical calculations to aid in molecular design and interpretation of experimental results, the projects involve development and application of inorganic/organic synthetic methods, structure-property relationship studies, and electrooptical characterization.

  2. Piotr Kaszynski, Vanderbilt University, DMR 0606317 We have investigated dielectric properties of a series of isostructural additives to a nematic host. We found that the behavior of a binary mixture is well described by the Maier-Meier relationship, which links the molecular (calculated) and bulk (measured) parameters of the compound. Careful analysis of the data revealed a wealth of information about the solute–solvent interactions, the impact of the additive on the host’s order parameter, and even the conformational preference of the additive. These findings shaped the development of another tool for formulation of mixtures for display applications. Research Group, Summer 2007 Graduate Student: Bryan Ringstrand visited The Czech Academy of Sciences to gain more experience in boron cluster chemistry. Undergraduate: Kristin Glab received the Goldwater and GS NSF scholarships, and participated in the SURE program at IBM-Almaden in 2006. Postdoctoral associates: Dr Adam Januszko and Dr Aleksandra Jankowiak Januszko, A.; Glab, K. L.; Kaszynski, P.; Patel, K.; Lewis, R. A.; Mehl, G. H.; Wand, M. D. J. Mater. Chem.2006, 16, 3183. Nagamine, T.; Januszko, A.; Kaszynski, P.; Ohta, K.; Endo, Y. J. Mater. Chem. 2006, 16, 3836.

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