Abstract
A colorimetric sensor based on dipyrromethane(donor)-7,7′,8,8′-tetracyanoquinodimethane (acceptor) charge-transfer compound depicts excellent selectivity for naked-eye as well as spectrophotometric determination of F − even in co-existence with other halide ions (Cl −, Br − and I −). The sensing mechanism is ascribed to the interrupted charge-transfer between donor–acceptor in the presence of F −. The sensing on solid support mimics the solution sensing process supported by the reflectance values. Thus this compound has potential for practical applications.
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