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Updated: Aug 6, 2026

Qualitative Identification of Carboxylic Acids, Boronic Acids, and Amines Using Cruciform Fluorophores
Published on: August 19, 2013
Near-infrared sensing properties of dimethlyamino-substituted BF2-azadipyrromethenes
Shane O McDonnell1, Donal F O'Shea
1Centre for Synthesis and Chemical Biology, Conway Institute, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
Abstract:
[reaction: see text] The synthesis and sensing characteristics of a new class of organic colorimetric and fluorometric chemosensor which operates in the 850-650 nm spectral region is outlined. Judicious placing of amine substituents on the BF2-chelated tetraarylazadipyrromethene chromophore generates a triple absorption and emission responsive sensor. Dramatic pH responsive absorption and fluorescence changes can be observed across a broad acidity range, from pH 5 to 6 M HCl, in conjunction with a visible colorimetric change from red to purple to blue.
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