Silicate Xerogels with Dopant-Induced Chirality |
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Authors: | Krzysztof Maruszewski Marek Jasiorski Witold Wacławek Wiesław Stręk Marek Lisowski |
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Affiliation: | (1) Institute of Low Temperature Research and Structural Studies, Polish Academy of Sciences, 50-950 Wrocaw 2, P.O. Box 937, Poland;(2) Chemistry Department, Opole University, Oleska 48, 45-052 Opole, Poland;(3) Chemistry Department, Wrocaw University, Wrocaw, Poland |
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Abstract: | A series of silicate xerogels with entrapped chiral amino acids have been obtained via sol-gel technology. The transparent, glassy samples obtained exhibit chirality in the bulk due to the presence of the entrapped asymmetric molecules. Measurements of the optical activity of the doped xerogel samples revealed that the entrapment did not significantly influence the optical activity observed for liquid solutions of the amino acids. Thus, the sol-gel method enables the preparation of amorphous optical materials exhibiting properties of strictly spatially defined molecular systems. Apart from the obvious optical applications, such porous materials with asymmetric centers might find interesting applications in chiral chemical syntheses and separations. |
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Keywords: | sol-gel technique optical activity amino acid doping |
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