Abstract
This study delves into the interaction between Titanium dioxide nanoparticles (TiO2 NPs) and 1,10-Phenanthroline Monohydrate (1,10-Phen), with a focus on quenching mechanisms and thermodynamic properties employing spectroscopic tools. Analysis reveals a decrease in quenching constants (KSV) at elevated temperatures (298 K, 303 K, 308 K), indicating static quenching mechanisms. Consistent binding sites (∼3) across temperatures suggest the formation of ground state complexes, supported by negative Gibbs free energy (ΔGo) values, confirming spontaneous complexation. The interaction between 1,10-Phen and TiO2 NPs manifests predominantly as electrostatic and ionic, inferred from the negative change in enthalpy (ΔHo) and positive change in entropy (ΔSo) values. Utilizing Foster resonance energy transfer theory (FRET), the distance between acceptor and donor is <70 Å, suggests significant energy transfer. Solvatochromic study helps in understanding the dipole interaction with the fluorophore. This research holds promise for biomedical applications, particularly in pharmaceutical contexts.
Published Version
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