Color-Tunable Cyano-Substituted Divinylene Arene Luminogens as Fluorescent π-Gelators

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• 作者：Fátima Aparicio ; Sandeep Cherumukkil ; Ayyappanpillai Ajayaghosh ; Luis Sánchez
• 刊名：Langmuir
• 出版年：2016
• 出版时间：January 12, 2016
• 年：2016
• 卷：32
• 期：1
• 页码：284-289
• 全文大小：374K
• ISSN：1520-5827

文摘

The synthesis of three cyano-substituted divinylene π-gelators is reported. The modulation of the color is achieved by placing the cyano groups in appropriate position of the conjugated backbone, thus modulating the donor–acceptor interaction. Variable-temperature UV–vis data have been utilized to investigate the self-assembly of the gelators 1–3 that is governed by a cooperative mechanism. A complete set of photophysical parameters (Φ_F,τ, k_r and k_nr) demonstrate the role of the molecular aggregation in enhanced emission upon self-assembly.