A pyridylvinylene derivative containing piazselenole displayed high selectivity toward glutathione in the presence of other biorelevant analytes. The compound exhibited a 19 run red-shift in absorption spectra and similar to 3-fold fluorescence intensity enhancement: in addition, it was possible to detect micromolar amounts of glutathione quantitatively using both red-shift absorbance and enhanced fluorescence. The mechanism of the reaction between the modified pyridylvinylene derivative and glutathione was confirmed using ESI-MS and absorption/fluorescence spectra. (C) 2009 Elsevier Ltd. All rights reserved.
NEIDLEIN, R.;KNECHT, D., HELV.-CHIM. ACTA, 70,(1987) N 4, 997-1000
作者:NEIDLEIN, R.、KNECHT, D.
DOI:——
日期:——
Dynamic Chalcogen Squares for Material and Topological Control over Macromolecules
作者:Aaron H. Bui、Anne D. Fernando Pulle、Aaron S. Micallef、Jacob J. Lessard、Bryan T. Tuten
DOI:10.1002/anie.202404474
日期:2024.5.27
Herein we introduce chalcogen squares via selenadiazole motifs as a new class of dynamic supramolecular bonding interactions for the modification and control of soft matter materials. We showcase selenadiazole motifs in supramolecular networks of varying primary chain length prepared through polymerization using tandem step‐growth/Passerini multicomponent reactions (MCRs). Compared to controls lacking the selenadiazole motif, these networks display increased glass transition temperatures and moduli due to the chalcogen bonding linkages formed between chains. These elastomeric networks were shown to autonomously heal at room temperature, retaining up to 83 % of the ultimate tensile strength. Lastly, we use post‐polymerization modification via the Biginelli MCR to add selenadiazole motifs to narrowly dispersed polymers for controlled topology in solution. Chalcogen squares via selenadiazoles introduce an exciting exchange mechanism to the realm of dynamic materials.