A new Vilsmeier-type reaction for one-pot synthesis of pH sensitive fluorescent cyanine dyes |
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| Authors: | Reda M El-Shishtawy Paulo Almeida |
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| Institution: | Departamento de Química and Unidade de I&D de Materiais Têxteis e Papeleiros, Universidade da Beira Interior, Rua Marquês d’ Ávila e Bolama 6200-001, Covilhã, Portugal |
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| Abstract: | A new Vilsmeier-type reaction is suggested for the synthesis of novel indocarbocyanine pH sensors, which are fluorescent when protonated but nonfluorescent upon proton abstraction. These sensors show significant ratiometric UV-visible as well as fluorescence spectral changes upon subtle variation of pHs with pKa values near neutral. |
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| Keywords: | Fluorescent pH sensors Vilsmeier reaction Vilsmeier-Haack reaction Cyanine dyes |
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