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

页码：348 / 354

页数：7

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