Time-resolved Study on Unconventional Fluorescence of an Azobenzene Liquid Crystal and its Phase Transition

被引：14

作者：

Azuma, Jun ^{[1
]}

Shishido, Atsushi ^{[2
]}

Ikeda, Tomiki ^{[2
]}

Tamai, Naoto ^{[1
]}

机构：

[1] Kwansei Gakuin Univ, Sch Sci, Dept Chem, Nishinomiya, Hyogo 662, Japan

[2] Tokyo Inst Technol, Res Lab Resources Utilizat, Midori Ku, Yokohama, Kanagawa 226, Japan

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1998年 / 314卷

关键词：

azobenzene; liquid crystal; phase transition; fluorescence; single-photon timing;

D O I：

10.1080/10587259808042460

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Fluorescence properties of ambenzene liquid crystal, 4.4'-dioctyloxy-azobenzene, were examined by steady-state and picosecond single-photon timing spectroscopy. It was found that the fluorescence from azobenzene aggregate with a peak at similar to 630 nm was observed in the solid phase in addition to the very weak S, fluorescence from ambenzene monomer centered at 420 nm. The fluorescence lifetimes of both aggregate and monomer S(2) state were estimated to be approximately 150 ps and shorter than 2 ps. The relationship between the excited-state dynamics of azobenzene liquid crystal and its phase transition was analyzed on the basis of the temperature dependence of relative fluorescence intensity and fluorescence lifetime of aggregate.

引用

页码：83 / 88

页数：6

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