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

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

南京林业大学学报（自然科学版） ›› 2011, Vol. 35 ›› Issue (04) : 83-86.

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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

研究论文

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

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First hyperpolarizabilities of Naryl pyridinium dyes

WU Weibing, ZHOU Xiaofan, JING Yi，DAI Hongqi

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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

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吴伟兵,周小凡,景宜，戴红旗. 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 https://doi.org/10.3969/j.jssn.1000-2006.2011.04.017

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 https://doi.org/10.3969/j.jssn.1000-2006.2011.04.017

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