Color change effect based on provitamin D phototransformation in cholesteric liquid crystalline mixtures

被引：12

作者：

Aronishidze, M

Chanishvili, A

Chilaya, G

Petriashvili, G

Tavzarashvili, S

Lisetski, L

Gvozdovskyy, I

Terenetskaya, I ^{[1
]}

机构：

[1] Natl Acad Sci Ukraine, Inst Phys, Kiev, Ukraine

[2] Georgian Acad Sci, Inst Cybernet, Tbilisi, Georgia

[3] Natl Acad Sci Ukraine, Inst Single Crystals, Kharkov, Ukraine

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2004年 / 420卷

关键词：

induced cholesteric; provitamin D phototransformation; UV monitoring;

D O I：

10.1080/15421400490478353

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

It has been shown that UV radiation can produce observable color changes in induced cholesteric systems ( nematic + optically active dopant) additionally doped with ergosterol ( provitamin D-2). The effect is based on the photoinduced conversion of ergosterol into vitamin D-2, which has the opposite sign of its helical twisting power. The observed shifts of the selective reflection peaks ( more then 100nm after 10 min of UV irradiation) allow both instrumental and visual monitoring of biologically active UV radiation.

引用

页码：47 / 53

页数：7

共 27 条

[1] EFFECT OF WAVELENGTH ON PRODUCTION OF PREVITAMIN D2 [J].