A Fluoride-Selective PCT Chemosensor Based on Formation of a Static Pyrene Excimer
Organic Letters2005Vol. 7(22), pp. 4839–4842
Citations Over TimeTop 10% of 2005 papers
Abstract
[reaction: see text] Calixarene-based fluorescent chemosensor 1 with two fluorogenic pyrene units conjugated to amide groups as guest recognition sites is synthesized. Complexation of F(-) by 1 causes a red shift of its absorption band to 400 nm (Deltalambda = 54 nm) and a blue shift of the excimer emission to 470 nm (Deltalambda = 12 nm) together with enhanced fluorescence intensity. The blue-shifted excimer emission is attributed to a pyrene dimer formed in the ground state, a so-called static excimer.
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