Andreia S.F. Farinha, M. Fernandes, A. Tomé
Sep 1, 2014
Citations
0
Influential Citations
15
Citations
Journal
Sensors and Actuators B-chemical
Abstract
Abstract The reaction of octamethylcalix[4]pyrrole with 3-(dimethylamino)prop-2-enal and POCl 3 affords a mixture of isomeric calix[4]pyrroles bearing two formylethenyl groups at the β -pyrrolic positions. These dialdehydes were used in Knoevenagel reactions with malononitrile and indene-1,3-dione leading to new chromogenic anion molecular probes. The binding ability of the new receptors was investigated by UV–vis spectroscopy and NMR, indicating the formation of supramolecular 1:2 host:guest complexes with high affinity constants.