Deep red emitting triphenylamine based coumarin-rhodamine hybrids with large Stokes shift and viscosity sensing: Synthesis, photophysical properties and DFT studies of their spirocyclic and open forms

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• 作者：Shantaram Kothavale ; Amol G. Jadhav ; Nagaiyan Sekar ; ^{n.sekar@ictmumbai.edu.in} ; ^{nethi.sekar@gmail.com}
• 关键词：Coumarin rhodamine hybrids ; Solvatochromism ; Viscosity sensitivity ; Deep red emitting dyes ; Density functional theory (DFT)
• 刊名：Dyes and Pigments
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：137
• 期：Complete
• 页码：329-341
• 全文大小：3443 K
• 卷排序：137

文摘

Synthesis of triphenylamine based novel coumarin-rhodamine hybrid dyes. In their open form they show absorption and emission peaks in the deep red region. Larger Stokes shift than reported rhodamine dyes RH-B and RH-101 are found. They exhibit viscosity sensitivity in visible as well as deep red region. Solvent polarity and viscosity works together for the observed emission enhancement.