A spectroscopic study on the dissociation behavior of 4-hydroxybenzylideneacetone type NLO chromophores in the presence of sodium hydroxide

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• 作者：Ulrich Oertel ; Marina M. Dudkina ; Hartmut Komber ; Bettina Pilch ; Andrey V. Tenkovtsev ; Frank Bö ; hme
• 关键词：Chromophore ; NLO ; Deprotonation ; Fluorescence
• 刊名：Optical Materials
• 出版年：2006
• 出版时间：December 2006
• 年：2006
• 卷：29
• 期：4
• 页码：377-385
• 全文大小：275 K

文摘

Interactions of phenolic and carboxylic groups containing NLO chromophores with NaOH in methanol were investigated by UV/vis, fluorescence and ¹H NMR measurements. With the aid of a mathematical fitting procedure, it was possible to separate the single contributions of the differently charged chromophore molecules to the overall UV/vis spectra. Individual concentrations of the involved species in dependence on the NaOH concentration were calculated by approximation of measured and calculated UV/vis spectra.

The fully deprotonated chromophores with their higher extent of conjugation did not exhibit remarkable fluorescence while the 3rd order NLO activity was observed to show the opposite behavior.