Synthesis and Photochromic Behavior of Azo-Polydiphenylsilanes

被引：10
|
作者：
Sacarescu, Liviu [1 ]
Sacarescu, Gabriela [1 ]
Simionescu, Mihaela [1 ]
Hurduc, Nicolae [2 ]
机构：
[1] Inst Macromol Chem Petru Poni, Iasi 700487, Romania
[2] Gh Asachi Tech Univ, Dept Nat & Synthet Polymers, Iasi 700050, Romania
来源：
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS | 2009年 / 19卷 / 03期
关键词：
Polysilanes; Azo-polymers; Photoisomerization; Photochromic behavior;
D O I：
10.1007/s10904-009-9269-5
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This work presents the influence of the trans-cis photoisomerization process of azobenzene-segments onto the optical properties of polysilanes. For this purpose 4-(phenyldiazenyl)phenol and 4-[(4'-nitrophenyl)diazenyl]phenol groups were attached to poly[diphenylsilane-co-methyl(bromopropyl)silane] using the Williamson etherification conditions. Photoisomerization of the pendant azo-groups by irradiation with 365 nm UV light induced distortion of the polysilane backbone conformation in a reversible manner. This process was studied by UV spectral analysis and the photochromic behavior of both polymers was established by taking into account the variation of the sigma-sigma* absorption intensity.
引用
收藏
页码：348 / 354
页数：7
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