Structure-function relationship exploration for enhanced electro-optic activity in isophorone-based organic NLO chromophores

被引：39

作者：

Liu, Fenggang ^{[1
]}

Zhang, Hua ^{[2
]}

Xiao, Hongyan ^{[2
]}

Xu, Huajun ^{[2
]}

Bo, Shuhui ^{[2
]}

Qiu, Ling ^{[2
]}

Zhen, Zhen ^{[2
]}

Lai, Lijie ^{[1
]}

Chen, Shujie ^{[1
]}

Wang, Jiahai ^{[1
]}

机构：

[1] Guangzhou Univ, Guangzhou Key Lab Environm Funct Mat & Technol, Sch Chem & Chem Engn, Guangzhou 510006, Guangdong, Peoples R China

[2] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China

来源：

DYES AND PIGMENTS | 2018年 / 157卷

基金：

中国国家自然科学基金;

关键词：

Nonlinear optics; Chromophore; Isolation group; Electro-optic; Isophorone; Structure-function; NONLINEAR-OPTICAL CHROMOPHORES; THERMAL-STABILITY; THIN-FILMS; DONOR; HYPERPOLARIZABILITY; OPTIMIZATION; DESIGN; SERIES;

D O I：

10.1016/j.dyepig.2018.04.036

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Four isophorone-based chromophores FLD1-FLD4 has been synthesized and investigated based on julolidinyl donors, with modified isophorone-derived bridges and tricyanovinyl-dihydrofuran or phenyl-trifluoromethyltricyanofuran acceptors. The chromophore FLD3 was modified with a 2-((tert-butyldimethylsilyl)oxy)ethanethiol group covalently attached to the pi-conjugate bridge to ensure its all-trans conformation and prevent close packing of molecules, which benefit the macroscopic electro-optic efficiency. The chromophore FLD3 possesses better thermal stability than chromophore FLD1 without the isolation group on the bridge. Moreover, density functional theory calculations suggested that the hyperpolarizability (beta) value of chromophore FLD3 is larger than that of chromophore FLD1. Polymers doped with chromophore FLD3 have been poled to afford ultrahigh electro-optic coefficient (r(33)) of 238 pm/V at 1.31 pm, which is nearly 60% higher than that obtained from chromophore FLD1 and three times higher than that of analogue chromophores FLD2 and FLD4.

引用

页码：55 / 63

页数：9

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