Structural, Morphological, Thermal, and Photophysical Insights into a Highly Fluorescent Symmetrically Functionalized Perylene Diimide

Perylene diimide (PDI) derivatives have garnered significant attention in organic electronics and optoelectronics due to their high fluorescence yields, exceptional electrical and thermal properties, and extensive π-conjugated systems. This study synthesized and characterized a new highly fluorescent symmetrical perylene diimide derivative in detail. The structural properties of the synthesized compound were analyzed using spectroscopic techniques (FT-IR, ¹H NMR, ¹³C NMR, and LC-MS/MS), while its morphology was examined via scanning electron microscopy (SEM). Thermal stability was evaluated using thermogravimetric analysis (TGA). The photophysical properties of the synthesized PDI derivative were assessed, revealing absorption maxima at 350 nm and 536 nm, along with an emission maximum at 566 nm and 0.38 quantum yield in a DMSO medium, attributed to its highly π-conjugated structure. Additionally, the solid-state fluorescence properties of the compound were investigated through fluorescence microscopy. These findings contribute to developing next-generation fluorescent materials, demonstrating their potential for applications in optoelectronics and advanced photonic technologies.