A Dynamically Responsive Chemosensor That Can be Modulated by an Effector: Amplification Sensing by Positive Heterotropic Allosterism
Bulletin of the Chemical Society of Japan, ISSN: 1348-0634, Vol: 95, Issue: 8, Page: 1183-1189
2022
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Article Description
Induced-fit chemosensors that can control their molecular recognition behavior using external stimuli such as temperature, light, pH, and chemical additives, have attracted much attention from several chemists. In this study, we report a bisporphyrinbisthioureabinaphthyl conjugated chemosensor that can be modulated using a chiral dianion. The optical properties of the chemosensor measured using fluorescence and UV/vis absorption spectroscopies, as well as fluorescence lifetime measurements, indicated that the unique conjugation enabled S fluorescence. The binding constants of the chemosensor for amino acids were amplified a thousand-fold compared to that of the reference compound due to positive heterotropic allosterism. The present study provides new perspectives for signal amplification of chemosensors by allosterism.
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