Fluorescent carbazolylurea- and carbazolylthiourea-based anion receptors and sensors

HISCOCK J. R;GALE P. A;CALTAGIRONE, CLAUDIA;HURSTHOUSE M. B;LIGHT M. E.

2010-01-01

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Abstract

A series of carbazolylurea- and carbazolylthiourea-based receptors have been synthesised and their anion complexation and fluorescence properties were studied. The urea compounds show selectivity for oxo-anion complexation over chloride and the fluorescence of compound 1 is selectively quenched by benzoate anions in DMSO/0.5% water. However, the thiourea compounds show reduced anion affinities compared to the urea analogues.