Photophysics studies of highly fluorescent ADS680HO laser dye conjugate with green silver nanoparticles

Determination of ground-state and excited-state dipole moments of a highly fluorescent laser dye molecule ADS680HO and comparison of excited-state dipole moment by Lippert, Bakhashiev, Kawski-Chamma-Viallet, McRae, Suppan, and solvent polarity methods. Kamlet–Abboud–Taft and Katritzky multilinear analysis for characterizing the solute–solvent interaction contribution into spectral features of the dye has also been studied. Correlation analysis of spectroscopic data with multiple polarity parameters was carried out by multiple linear regression analysis. Optical absorption and fluorescence of ADS680HO in various solvents with attachment of green silver nanoparticles (AgNPs) shows quenching of absorption and fluorescence intensities. This is due to size, shape, and coupling between the AgNPs and the dye, and energy transfer between the dye and the AgNPs. Fluorescence quenching of ADS680HO leads to many applications notably for advancement in biomolecular labeling and fluorescence patterning and chemotherapy in cancer treatment.