A Light Induced Change in Cholesteric Pitch by Photoracemization of a Chiral Pyrenyl Sulfoxide.
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Accession number;99A0156460
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| Title;A Light Induced Change in Cholesteric Pitch by Photoracemization of a Chiral Pyrenyl Sulfoxide. |
| Author;
TSURUTANI Y
(Univ. Tokyo, Tokyo)
MACHIDA S
(Univ. Tokyo, Tokyo)
HORIE K
(Univ. Tokyo, Tokyo)
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Journal Title;Chem Lett
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Journal Code:S0742A
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ISSN:0366-7022
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VOL.;NO.1;PAGE.87-88(1999)
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| Figure&Table&Reference;FIG.2, TBL.1, REF.10 |
| Pub. Country;Japan |
| Language;English |
| Abstract;A cholesteric phase of 4'-pentyl-4-biphenyl carbonitrile (5CB) doped with (R)-(+)-1-pyrenyl-4-tolyl sulfoxide (1) was observed. Changes in a cholesteric pitch, p, in the liquid crystalline phase was induced by photoracemization and agreed with a theoretical line A helical twisting power, .BETA.M, of 1 in 5CB was obtained to be -1.1 .MU.m-1 M-1. Anisotropy factor, g, of I in acetonitrile was determined to be 2.1*10-3 at 375 nm and 2.9*10-3 at 302 nm. (author abst.) |
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