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	Photoresponsive J-aggregation behavior of a novel azobenzene-phthalocyanine dyad and its third-order optical nonlinearity
	Chen, Zihui ; Zhong, Cheng ; Zhang, Zhi ; Li, Zhongyu ; Niu, Lihong ; Bin, Yuejing ; Zhang, Fushi
	2010-05-06 ; 2010-05-06
关键词	METAL PHTHALOCYANINES NAPHTHALOCYANINES PHOTOIRRADIATION SUSCEPTIBILITY COORDINATION ENHANCEMENT ULTRAFAST SWITCHES DYNAMICS STATE Chemistry, Physical
中文摘要	The photoresponsive J-aggregation behaviors of a novel azobenzene-substituted zinc phthalocyanine (azo-ZnPc dyad) were studied by UV/vis, fluorescence, and H-1 NMR spectroscopy. Upon illumination with 365 urn UV light, the trans-cis isomerization of azobenzene can efficiently reduce the steric hindrance around the peripheral oxygen atom of azo-ZnPc, shortening the possible distance between two phthalocyanine molecules and, consequently, greatly improving the tendency of J-aggregation of azo-ZnPc dyad. The third-order optical nonlinearities of the photoresponsive J-aggregates (before and after illumination) were measured by a Z-scan technique at 532 nm with a pulse duration of 25 ps. The Z-scan spectra revealed that all the samples possessed large positive nonlinear refraction and positive nonlinear absorption, exhibiting a self-focusing effect and reverse saturable absorption, respectively. The second molecular hyperpolarizabilities of the dyad in two conditions were measured to be 3.87 x 10(-30) and 4.82 x 10(-30) esu, respectively. All the results suggest that the azo-ZnPc dyad has potential in the field of nonlinear optics applications.
语种	英语 ; 英语
出版者	AMER CHEMICAL SOC ; WASHINGTON ; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/13122]
专题	清华大学
推荐引用方式 GB/T 7714	Chen, Zihui,Zhong, Cheng,Zhang, Zhi,et al. Photoresponsive J-aggregation behavior of a novel azobenzene-phthalocyanine dyad and its third-order optical nonlinearity[J],2010, 2010.
APA	Chen, Zihui.,Zhong, Cheng.,Zhang, Zhi.,Li, Zhongyu.,Niu, Lihong.,...&Zhang, Fushi.(2010).Photoresponsive J-aggregation behavior of a novel azobenzene-phthalocyanine dyad and its third-order optical nonlinearity..
MLA	Chen, Zihui,et al."Photoresponsive J-aggregation behavior of a novel azobenzene-phthalocyanine dyad and its third-order optical nonlinearity".(2010).

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