N-芳基吡啶盐染料的一阶超极化率性质

doi:10.3969/j.jssn.1000-2006.2011.04.017

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南京林业大学学报（自然科学版） ›› 2011, Vol. 35 ›› Issue (04): 83-86.doi: 10.3969/j.jssn.1000-2006.2011.04.017

N-芳基吡啶盐染料的一阶超极化率性质

吴伟兵,周小凡,景宜，戴红旗

南京林业大学，江苏省制浆造纸科学与技术重点实验室，江苏南京210037

出版日期:2011-08-13 发布日期:2011-08-13
基金资助:
收稿日期：2010-09-25修回日期：2011-03-23 基金项目：江苏省制浆造纸科学与技术重点实验室开放课题（200907）；国家自然科学基金项目（30972321）作者简介：吴伟兵(1982—)，讲师，博士。Email: wbwu@yahoo.cn。

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

摘要/Abstract

摘要： 在纳秒激光器上通过超瑞利散射 (HRS) 技术测定了具有推拉结构的 N-芳基取代吡啶盐类化合物的一阶超极化率，研究了它们的二阶非线性光学性质。结果表明，当吡啶环中N原子上的取代基由烷基变成芳基时，化合物的荧光发射强度急剧降低，但是一阶超极化率却明显增加。该系列化合物中两个相连的六元环破坏了吡啶盐的共轭平面结构，降低了化合物的荧光量子效率；另一方面，吡啶环上的取代芳基相对于烷基而言，其共轭体系增大，推拉电子能力增强，分子内电荷转移程度增大，从而提高了吡啶盐化合物的一阶超极化率。

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

中图分类号:

O631

吴伟兵,周小凡,景宜,等. N-芳基吡啶盐染料的一阶超极化率性质[J]. 南京林业大学学报（自然科学版）, 2011, 35(04): 83-86.

WU Weibing, ZHOU Xiaofan, JING Yi，DAI Hongqi. First hyperpolarizabilities of Naryl pyridinium dyes[J].Journal of Nanjing Forestry University (Natural Science Edition), 2011, 35(04): 83-86.DOI: 10.3969/j.jssn.1000-2006.2011.04.017.

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N-芳基吡啶盐染料的一阶超极化率性质

First hyperpolarizabilities of Naryl pyridinium dyes

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