Azo-azulene derivatives as second-order nonlinear optical chromophores

被引：2
|
作者：
Lacroix, PG
Malfant, I
Iftime, G
Razus, AC
Nakatani, K
Delaire, JA
机构：
[1] CNRS, Chim Coordinat Lab, F-31077 Toulouse, France
[2] CD Nentzescu Inst Organ Chem, Bucharest 71141, Romania
[3] Ecole Normale Super, UMR 8531, PPSM, F-94235 Cachan, France
来源：
CHEMISTRY-A EUROPEAN JOURNAL | 2000年 / 6卷 / 14期
关键词：
chromophores; donor-acceptor systems; nonlinear optics; semiempirical calculations; solvatochromism;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The molecular and solid state nonlinear optical (NLO) properties of several (phenylazo)-azulenes are investigated. In particular, (4-nitrophenylazo)-azulene (2b) exhibits a quadratic hyperpolarizability (beta(vec)) of 80 x 10(-30) cm(5) esu recorded at 1.907 mu m by the electric field-induced second-harmonic (EFISH) technique. This molecular material, which crystallizes in the monoclinic noncentrosymmetric space group Pc, exhibits an efficiency 420 times that of urea in second-harmonic generation. The origin of the optical nonlinearity in azo-azulene is discussed in relation with crystal structures and semiempirical calculations within the INDO/SOS formalism, and compared with that of the well known disperse red one (DR1) organic dye.
引用
收藏
页码：2599 / 2608
页数：10
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