Fariba Nasimpour, Mohammadreza Mansournia, Alireza Badiei
The meta-phenylenediamine polymer, when hyper-cross-linked, exhibits a minimal fluorescence intensity. However, the introduction of silver ions induces a significant increase in intensity, attributed to the plasmonic effect. This heightened intensity is selectively increased more upon the addition of thiosulfate ions. Capitalizing on this property, a fluorescence probe was developed. The correlation between fluorescence intensity reduction and S2 O3 2- concentration follows a linear and consistent pattern. The precursor's response to diverse anions such as SO4 2- , CO3 2- , HPO4 2- , Cr2 O7 2- , F- , Cl- , Br- , I- , H2 PO4 - , CH3 COO- , NO3 - , ClO- , and HCO3 - was also examined...
April 17, 2024: Journal of Fluorescence