Pyrrole-Based Hydrazone Organic Nonlinear Optical Crystals and Their Polymorphs

被引：44

作者：

Kwon, O-Pil ^{[1
,2
]}

Jazbinsek, Mojca ^{[2
]}

Yun, Hoseop ^{[3
,4
]}

Seo, Jung-In ^{[5
,6
]}

Kim, Eun-Mi ^{[1
]}

Lee, Yoon-Sup ^{[5
,6
]}

Guenter, Peter ^{[2
]}

机构：

[1] Ajou Univ, Dept Mol Sci & Technol, Suwon 443749, South Korea

[2] ETH, Nonlinear Opt Lab, CH-8093 Zurich, Switzerland

[3] Ajou Univ, Div Energy Syst Res, Suwon 443749, South Korea

[4] Ajou Univ, Dept Chem, Suwon 443749, South Korea

[5] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea

[6] Korea Adv Inst Sci & Technol, Sch Mol Sci BK 21, Taejon 305701, South Korea

来源：

CRYSTAL GROWTH & DESIGN | 2008年 / 8卷 / 11期

基金：

瑞士国家科学基金会;

关键词：

D O I：

10.1021/cg800218u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of new organic nonlinear optical nitrophenylhydrazone crystals based on pyrrole with various substituents (X: -H, -CH3, -CF3) on the hydrazone group (-CX = N-NH-) has been synthesized and their polymorphs have been investigated. The chromophore 2-((2-(4-nitrophenyl)hydrazono)methyl)-1H-pyrrole (HNPH) exhibits two polymorphs with large macroscopic nonlinearity, with a powder second harmonic generation activity of 420 times and 210 times that of urea at 1.9 mu m for the anisotropic polar HNPH-I with P-n space group and the isotropic nonpolar HNPH-II polymorph with P2(1)2(1)2(1) space group, respectively. The microscopic and macroscopic nonlinearities in the crystallographic system have been analyzed theoretically using finite field calculations.

引用

页码：4021 / 4025

页数：5

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