First hyperpolarizabilities of Naryl pyridinium dyes

doi:10.3969/j.jssn.1000-2006.2011.04.017

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2011, Vol. 35 ›› Issue (04): 83-86.doi: 10.3969/j.jssn.1000-2006.2011.04.017

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First hyperpolarizabilities of Naryl pyridinium dyes

WU Weibing, ZHOU Xiaofan, JING Yi，DAI Hongqi

Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037， China

Online:2011-08-13 Published:2011-08-13

Abstract

Abstract: First hyperpolarizability (β) values of a series of Naryl pyridinium dyes with “pushpull” structure were measured by hyperrayleigh scattering (HRS) technique with an Nd:YAG nanosecond laser. The result showed that fluorescence of these compounds decreased intensively but β values increased when alkyl was replaced with aryl at pyridine N atom. The simulative geometrical structure indicated that aryl substitute directly linked to pyridine ring broke the planarity of the conjugated system which decreased the fluorescence quantum field greatly. The increase of β might be mainly attributed to the enhanced electronwithdrawing abilities of corresponding aryl substitute

CLC Number:

O631

WU Weibing, ZHOU Xiaofan, JING Yi，DAI Hongqi. First hyperpolarizabilities of Naryl pyridinium dyes[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2011, 35(04): 83-86.

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First hyperpolarizabilities of Naryl pyridinium dyes

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