通过溶胶-凝胶法与异佛尔酮基染料共价结合的杂化材料用于非线性光学应用。

Hybrid materials covalently incorporated with isophorone-based dyes through sol-gel process for nonlinear optical applications.

作者信息

Chen Lujian, Qian Guodong, Cui Yuanjing, Jin Xuefeng, Wang Zhiyu, Wang Minquan

机构信息

Department of Materials Science and Engineering, State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027, People's Republic of China.

出版信息

J Phys Chem B. 2006 Oct 5;110(39):19176-82. doi: 10.1021/jp063802a.

DOI:10.1021/jp063802a

PMID:17004766

Abstract

Two new push-pull type second-order nonlinear optical (NLO) active isophorone-based alkoxysilane dyes with the same acceptor were synthesized and characterized. One silane (ICTES-HEMA) bears a chromophore with a hydroxyethyl methylamino donor and the other silane (ICTES-HMPP) is a bulkier analogue with a hydroxymethyl diphenylamino donor. Transparent, homogeneous films were prepared via the copolymerization of tetraalkoxysilane (TEOS) and different NLO silanes with the ratio of 5:1. The d(33) values obtained for the HEMA and HMPP films are 46.3 and 20.6 pm/V, respectively. Normalized UV-vis spectra reveal that the introduction of a diaryl group would help to prevent unfavorable organization of the chromophores. The reorientation dynamic stabilities of the samples were studied by second-harmonic generation (SHG) measurements, demonstrating that bulkier chromophores incorporated in sol-gel materials would not necessarily lead to higher stabilities over time.

摘要

合成并表征了两种新型具有相同受体的推挽型二阶非线性光学（NLO）活性异佛尔酮基烷氧基硅烷染料。一种硅烷（ICTES-HEMA）带有一个具有羟乙基甲基氨基供体的发色团，另一种硅烷（ICTES-HMPP）是具有羟甲基二苯胺供体的更大的类似物。通过四烷氧基硅烷（TEOS）与不同的NLO硅烷以5:1的比例共聚制备了透明、均匀的薄膜。HEMA和HMPP薄膜的d(33)值分别为46.3和20.6 pm/V。归一化紫外-可见光谱表明，二芳基的引入有助于防止发色团的不利排列。通过二次谐波产生（SHG）测量研究了样品的重取向动态稳定性，表明掺入溶胶-凝胶材料中的更大的发色团不一定会随着时间的推移而导致更高的稳定性。