Energy transfer processes in 1,3-bis(pyridyl) iminoisoindoline based donor-acceptor system-Synthesis, photophysics, and TD-DFT study

Isoindoline and its derivatives perform a critical role in the development of pincer-like chemicals, metal chelates and novel chromophores. In this study, 1,3-bis(2-pyridylimino)isoindoline derivative bearing phenol unit and its zinc complex were synthesized and characterized by NMR, FTIR, UV-Vis, and mass spectroscopic methods. The electronic (chemical hardness, electronegativity, electron affinity) and optical properties of the Phenol-BPI and Phenol-BPI-Zn were investigated using density functional theory (DFT) and time dependent density functional theory (TD-DFT) respectively. The excitation and emission results confirmed that the phenomenon of energy transfer is carried out in the Phenol-BPI and Phenol-BPI-Zn molecules when a phenol group is added to the structure.