Advances in understanding the photoresponsive behavior of azobenzenes substituted with strong electron withdrawing groups

被引：23

作者：

Jerca, Valentin Victor ^{[1
,2
]}

Jerca, Florica Adriana ^{[1
]}

Rau, Ileana ^{[3
]}

Manea, Ana Maria ^{[3
]}

Vuluga, Dumitru Mircea ^{[1
]}

Kajzar, Francois ^{[3
,4
]}

机构：

[1] Romanian Acad, Ctr Organ Chem Costin D Nenitescu, Bucharest 060023, Romania

[2] Univ Politehn Bucuresti, Fac Appl Chem & Mat Sci, Dept Bioresources & Polymer Sci, Bucharest 011061, Romania

[3] Univ Politehn Bucuresti, Fac Appl Chem & Mat Sci, Dept Gen Chem, Bucharest 011061, Romania

[4] Univ Angers, Inst Sci & Technol Mol Angers, F-49045 Angers, France

来源：

OPTICAL MATERIALS | 2015年 / 48卷

关键词：

Azobenzene; Isomerization kinetics; Photochemistry; Z isomers; cis-trans Isomerization; NONLINEAR-OPTICAL PROPERTIES; TO-TRANS ISOMERIZATION; AZO; PHOTOISOMERIZATION; ENHANCEMENT; DERIVATIVES; COPOLYMERS; BLENDS;

D O I：

10.1016/j.optmat.2015.07.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, a detailed isomerization study of a series of 2,4-nitro/cyan substituted azobenzenes is conducted by UV-Vis spectroscopy. The experiments, carried out in both toluene and N, N'-dimethylformamide, reveal an intriguing behavior. Interestingly, the disubstituted azo-derivatives display stable Z isomers in DMF, while in toluene they exhibit very fast relaxation. In addition, the azo-derivatives thermally isomerize from the metastable Z form to the thermodynamically stable E isomer through either inversion route or rotational mechanism, depending on the chemical nature of the substituents and on the solvent polarity. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：160 / 164

页数：5

共 2 条

[1] Investigations of molecular nonlinear optical polarizabilities of azobenzenes substituted with strong acceptor groups
Jerca, Valentin Victor
Jerca, Florica Adriana
Rau, Ileana
Kajzar, Francois
Vasilescu, Dan Sorin
Vuluga, Dumitru Mircea
NANOBIOSYSTEMS: PROCESSING, CHARACTERIZATION, AND APPLICATIONS VII, 2014, 9171
[2] Photoresponsive behavior of two well-defined azo polymers with different electron-withdrawing groups on push-pull azo chromophores
Zhu, Yu
Zhou, Yuqi
Wang, Xiaogong
DYES AND PIGMENTS, 2013, 99 (01) : 209 - 219

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