کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5271730 | 1385447 | 2013 | 4 صفحه PDF | دانلود رایگان |
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.
A 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.
Journal: Tetrahedron Letters - Volume 54, Issue 46, 13 November 2013, Pages 6164-6167