Oxadiazole-Based Fluorescent Dyes: Photophysical Characterization and Dual Application in Latent Fingerprint Detection and Security Inks.

ABSTRACT: In this study, a series of novel oxadiazole-based fluorescent dyes were synthesized and thoroughly characterized through spectroscopic analysis, theoretical modeling, and application testing. The structural design incorporated donor-acceptor motifs to promote intramolecular charge transfer (ICT), resulting in strong fluorescence across the violet-to-green spectral region (363-536 nm) with large Stokes shifts. The photophysical behavior of the dyes was investigated in solvents of varying polarity, revealing distinct solvatochromic effects and enhanced emission efficiency, particularly for diphenylamine-substituted derivatives. Density Functional Theory (DFT) calculations supported experimental observations, confirming frontier orbital distributions consistent with ICT. Thermal stability was

SUBMITTER: Badawy SA 

PROVIDER: S-EPMC12858573 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature