Dynamics of Preferential Solvation of 5-Aminoquinoline in Hexane–Alcohol Solvent Mixtures

• DOI: 10.1021/acs.jpcb.9b09143
• Publication Date: 2019-11-05T18:58:29Z
• Authors: Sharmistha Das; Avinash Kumar Singh; Deep Sekhar Biswas; Anindya Datta
• Keywords: Mole fraction; Nanosecond; Hexane; Stokes shift

Dynamics of preferential solvation 5-aminoquinoline (5AQ) has been studied in hexane-alcohol solvent mixtures. Significant spectral red shift and fluorescence quenching are observed, even for miniscule amounts alcohols. A nonlinear variation these parameters, with alcohol mole fraction, indicates dipolar enrichment around 5AQ its excited state. nanosecond rise at the end emission spectra is ascribed to translational diffusion molecules consequent 5AQ. Electrostatic stabilization hydrogen bonding between state fluorophore polar major driving factors here. Time evolution spectra, from those a predominantly hexane-like environment alcohol-like environment, takes place time scale depends on concentration mixture. This agreement calculations using an existing model. Hence, found be suitable fluorescent probe study dynamics complex systems.