Synthesis and properties of NLO chromophores with fine-tuned gradient   electronic structures

doi:10.1039/b817789a

CORC > 北京大学 > 化学与分子工程学院

	Synthesis and properties of NLO chromophores with fine-tuned gradient electronic structures
	Ma, Xiaohua ; Ma, Fei ; Zhao, Zhenhua ; Song, Naiheng ; Zhang, Jianping
刊名	材料化学杂志
	2009
关键词	NONLINEAR-OPTICAL CHROMOPHORES 1ST HYPERPOLARIZABILITY MOLECULAR HYPERPOLARIZABILITIES ELECTROOPTIC ACTIVITIES 2ND-ORDER NONLINEARITY POLYMERIC MATERIALS DONOR DESIGN DERIVATIVES ULTRALARGE
DOI	10.1039/b817789a
英文摘要	A novel series of heterocycle-based NLO chromophores based on different combinations of auxiliary donor (i.e., benzene, thiophene and pyrrole) and auxiliary acceptor (i.e., thiazole with different regiochemistries) were designed and synthesized. Due to the different electron-rich and poor nature of the auxiliary donors and acceptors, respectively, the resulting NLO chromophores have systematically varied ground-state electronic structures, as evidenced by the (1)H NMR, CV and UV-vis investigations. The nonlinear optical properties of the resulting NLO chromophores were studied by UV-vis spectroscopy, Hyper-Rayleigh scattering (HRS), and semi-empirical computations. All the chromophores have very large molecular hyperpolarizabilities (beta(1000 nm)) in the range of 704-1500 x 10(-30) esu (or beta(0), 318-768 x 10(-30) esu), which showed a great sensitivity to the gradient electronic structures. Upon increasing the electron density from benzene to thiophene and to pyrrole, substantial increases in beta(0) were observed; significantly larger beta(0) values were also observed for NLO chromophores based on "matched'' thiazole (C2 is connected to the acceptor) than those based on "un-matched'' thiazole (C5 is connected to the acceptor). TGA investigations showed good thermal stability for the resulting NLO chromophores. However, with the increase of electron density of the auxiliary donor, a decrease in thermal and photochemical stability was observed. It is interesting to note that NLO chromophores based on triarylamine as the donor and thiazole as the auxiliary acceptor exhibited not only high thermal stability but also very large beta(0) values.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000265919300015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Chemistry, Physical; Materials Science, Multidisciplinary; SCI(E); EI; 25; ARTICLE; 19; 2975-2985; 19
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/151365]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Ma, Xiaohua,Ma, Fei,Zhao, Zhenhua,et al. Synthesis and properties of NLO chromophores with fine-tuned gradient electronic structures[J]. 材料化学杂志,2009.
APA	Ma, Xiaohua,Ma, Fei,Zhao, Zhenhua,Song, Naiheng,&Zhang, Jianping.(2009).Synthesis and properties of NLO chromophores with fine-tuned gradient electronic structures.材料化学杂志.
MLA	Ma, Xiaohua,et al."Synthesis and properties of NLO chromophores with fine-tuned gradient electronic structures".材料化学杂志 (2009).