The preparation of two distinct calix[4]pyrrole-modified silica gels is reported. These systems, designed to investigate the binding characteristics of calix[4]]pyrroles with anionic and neutral substrates, also provide a new solid support for the HPLC separation of nucleotides, oligonucleotides, N-protected amino acids and perfluorinated biphenyls. Binding affinities for the interaction of anions with calix[4]pyrrole amide derivatives are also reported; these were determined from H-1 NMR spectroscopic analyses carried out in CD2Cl2.
Anthracene-linked calix[4]pyrroles: fluorescent chemosensors for anions
作者:Hidekazu Miyaji、Pavel Anzenbacher Jr、Jonathan L. Sessler、Ellen R. Bleasdale、Philip A. Gale
DOI:10.1039/a905054j
日期:——
Fluorescent anthracene–calix[4]pyrrole conjugates 2, 4 and 5 have been synthesized; these receptors can detect the presence of anions (e.g. F–, Cl–, H2PO4–) by a significant quenching of their fluorescence.