A ruthenium bipyridyl-dye sensitizer (N) based on the naphthyl-thiazole anchoring-ancillary ligand was synthesized and characterized using spectroscopic methods of UV-Vis, 1 H NMR, FTIR and fluorescence. The functional properties of N were investigated through its photoinduced and intramolecular based charge transfer mechanisms. Subsequently, N displayed interesting charge transfer-based properties (ESIPT) that are complementary to molecular photovoltaic and chemosensing properties. The properties were investigated and studied in dimethyl sulfoxide (DMSO), due to its polar nature and solubility of the dye. Dye sensitizer exhibitions were investigated through solvatochromism effect on the optoelectronic properties, while chemosensing abilities were inspected through colorimetric activities, upon molar addition of anions. Thus, it was established that a dual functional N is a potential dye sensitizer with optoelectronic properties displaying high molar extinction coefficients in acetone. In addition, it was found that N is a colorimetric and fluorometric probe selective and sensitive to biologically important anions of CN − , F − , OH − and AcO − through fluorescence enhancement, as a result of hydrogenbonding leading to deprotonation. The sensing probe, however, displayed more strongly association with CN − .

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Dye sensitizers are entities designed primarily to serve the function of harvesting light photons in the functional wavelength, which is centered on charge transfer mechanisms. A metal-free dye sensitizer (J)...

A ditopic multi-colorimetric probe based on the phenylpridyl-thioic moiety (EN) was synthesized via a Schiff base reaction mechanism and characterized using 1H NMR and UV-vis spectroscopy.