Spectroscopic Analysis of 4-MeO-TPA with Metal Oxide Nano-Assembly: Insights on Fluorescence Quenching and FRET.

This study presents a spectroscopic analysis of the 4-MeO-TPA compound and zinc oxide nanoparticles at room temperature. We examined the effect of ZnO nanoparticles using fluorescence quenching and FRET theory. The size and composition of ZnO nanoparticles were determined by XRD and EDX. Steady-state and time-resolved techniques produced linear Stern-Volmer plots, indicating that collisional quenching is the main mechanism in these systems. The Benesi–Hildebrand equation revealed a strong association between 4-MeO-TPA and ZnO NPs. The measured distance between 4-MeO-TPA and ZnO nanoparticles was found to be within the Förster radius (< 70 Å), facilitating efficient energy transfer and underscoring the potential of this system for developing high-performance optoelectronic devices and ultrasensitive biosensors.