Strong Solvatochromic Fluorescence from the Intramolecular Charge-Transfer State Created by Excited-State Intramolecular Proton Transfer

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• 作者：Jangwon Seo ; Sehoon Kim ; and Soo Young Park
• 刊名：Journal of the American Chemical Society
• 出版年：2004
• 出版时间：September 15, 2004
• 年：2004
• 卷：126
• 期：36
• 页码：11154 - 11155
• 全文大小：51K
• 年卷期：v.126,no.36(September 15, 2004)
• ISSN：1520-5126

文摘

In this work, we report a peculiar positive solvatochromism in the keto emission of the acceptor-substituted 2-(2'-hydroxyphenyl)benzoxazoles (HBO), which originates from the excited-state intramolecular proton transfer (ESIPT) followed by the intramolecular charge transfer (ICT) and subsequent solvent relaxation. This transient evolution of enhanced ICT characteristic triggered by ESIPT, which is first observed in this work, is responsible for the novel concept of a fast hyperpolarizability modulator as well as the unique solvatochromic behavior.