Article ID Journal Published Year Pages File Type
5271730 Tetrahedron Letters 2013 4 Pages PDF
Abstract

A novel azophenol-quinazoline dyad 1 has been designed, synthesized and demonstrated as an efficient reversible multichannel pH indicator through distinct signalling in aqueous media. Owing to the competence between highly fluorescent quinazoline moiety and a well known fluorescence quencher diazo group, dyad 1 is moderately fluorescent in nature. Under acidic conditions 1 displays diverse fluorogenic changes (blue emission at pH 4.25; green at pH 1.80) while under basic condition (pH 11.80) chromogenic changes were observed.

Graphical abstractA novel azophenol-quinazoline dyad 1 has been designed, and employed as an efficient reversible multichannel pH indicator through distinct signalling in aqueous media. Owing to the competence between highly fluorescent quinazoline moiety and a well known fluorescence quencher diazo group, dyad 1 is moderately fluorescent. Under acidic conditions 1 displays diverse fluorogenic changes (blue emission at pH 4.25; green emission at pH 1.80) while under basic conditions (pH 11.80) chromogenic changes were observed.Download full-size image

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Physical Sciences and Engineering Chemistry Organic Chemistry
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