Synthesis and Photophysical Investigation of a Series of Push鈥揚ull Arylvinyldiazine Chromophores

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• 作者：Sylvain Achelle ; Alberto Barsella ; Christine Baudequin ; Bertrand Caro ; Fran莽oise Robin-le Guen
• 刊名：The Journal of Organic Chemistry
• 出版年：2012
• 出版时间：April 20, 2012
• 年：2012
• 卷：77
• 期：8
• 页码：4087-4096
• 全文大小：445K
• 年卷期：v.77,no.8(April 20, 2012)
• ISSN：1520-6904

文摘

A new series of push鈥損ull arylvinyldiazines has been efficiently prepared by aldol condensation between the appropriate methyldiazine and aromatic aldehyde. The optical absorption and emission properties of these chromophores were studied in different solvents and media. These compounds act as polarity sensors with a strong positive emission solvatochromism. This behavior suggests a highly polar emitting state, which is characteristic of compounds that undergo an internal charge transfer upon excitation. These molecules also exhibit halochromic properties and are potential colorimetric and luminescence pH sensors. The second-order nonlinear properties have been investigated for some of the compounds, and large and positive 渭尾 are obtained, in particular, for pyrimidine derivatives.