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Complexes from Polyazacyclophanes, Fluorescence Indicators, and Metal Cations—An Example of Allosterism through Ring Contraction
Author(s) -
Baldes Ralf,
Schneider HansJörg
Publication year - 1995
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199503211
Subject(s) - chemistry , fluorescence , metal ions in aqueous solution , ternary operation , metal , aqueous solution , molecule , fluorescence spectroscopy , crystallography , contraction (grammar) , spectroscopy , zinc , inorganic chemistry , organic chemistry , physics , quantum mechanics , computer science , programming language , medicine
A cavity can be made to fit an aromatic guest molecule in certain polyazacyclophanes by contraction of the inner volume, which is initiated by the binding of metal cations. The anticipated cooperative effects can be quantified by fluorescene spectroscopy with suitable indicators, which opens new possibilities for the detection of, for instance, zinc ions in aqueous solution. The ternary complex formed from ligand, metal ion M, and guest G is depicted on the right.