Responsive Behavior of 4-(N-maleimido)azobenzene in Polymers with Aromatic Main Chain and Side Chain Linked Units

被引：19

作者：

Airinei, Anton ^{[1
]}

Rusu, Elena ^{[1
]}

Barboiu, Virgil ^{[1
]}

机构：

[1] Acad Romana, Petru Poni Inst Macromol Chem, Iasi 700487, Romania

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2010年 / 21卷 / 03期

关键词：

azobenzene; photoisomerization; UV-Vis spectroscopy; thin polymer film; CIS-TRANS ISOMERIZATION; AZO POLYMERS; THERMAL ISOMERIZATION; AZOBENZENE; PHOTOISOMERIZATION; FILM; PHOTOCHEMISTRY; MATRICES; DYE; POLYMETHACRYLATES;

D O I：

10.1590/S0103-50532010000300014

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polymer matrices with aromatic main chain and side chain linked units (polystyrene, polysulfone) were employed to construct thin films containing maleimidoazobenzene molecules in order to develop new materials with responsive properties. The photochromic behavior of the active compound was studied both in the solid and solution state for comparison. The thermal cis-trans isomerization of azobenzene chromophores in polymer films follows two different kinetic pathways. A double-exponential relaxation process (fast and slow) took place in polystyrene matrix under 70 degrees C while the thermal isomerization at 70 degrees C and higher follows a first-order kinetics. The cis isomer content corresponding to the photostationary state was found to be lower in polymer films than in solution.

引用

页码：489 / 495

页数：7

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