First hyperpolarizabilities of Naryl pyridinium dyes

WU Weibing, ZHOU Xiaofan, JING Yi,DAI Hongqi

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2011, Vol. 35 ›› Issue (04) : 83-86.

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

First hyperpolarizabilities of Naryl pyridinium dyes

  • WU Weibing, ZHOU Xiaofan, JING Yi,DAI Hongqi
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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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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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