Study on Photophysical Properties of Novel Fluorescent Phenanthroimidazole-Thiadiazole Hybrid Derivatives

Phenanthroimidazole-thiadiazole hybrid derivatives, which are new heterocyclic compounds with fluorescence properties, were synthesized by designing a two-step reaction mechanism and their photophysical properties were investigated. The synthesized derivatives were purified and their structures were elucidated by ATR-IR, H-1-NMR, elemental analysis and HR-MS methods. In the next stage of the study, the absorption and emission spectra of the synthesized new phenanthroimidazole-thiadiazole hybrid derivatives were determined by UV-Vis and fluorescence spectroscopy. Stokes' shifts, molar extinction coefficients (epsilon), singlet energy levels (Es), quantum yield (phi(f)), lifetimes (tau), the radiative (k(r)) and the nonradiative (k(nr)) constant for new hybrid derivatives were measured in DMSO. In addition, aggregation measurements, which is an important parameter that changes the photophysical properties were performed and for these compounds, structure: photophysical properties were discussed.

Automated summary

In this study, a two-step reaction mechanism was designed to synthesize a new class of phenanthroimidazole-thiadiazole hybrid derivatives, which exhibit fluorescence properties. The structures of the synthesized derivatives were determined using various analytical methods, and their absorption and emission spectra, as well as other photophysical properties, were investigated through spectroscopic analysis.