Optical and Self-Assembly studies of some New Perylene Tetracarboxylic Diimides

Two new symmetrical Perylene Tetracarboxylic Diimides (PTCDIs) namely HA-PTCDI and DA-PTCDI were synthesized by the condensation reaction of perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) and with suitable anilines in molten imidazole. Optical and emission properties of both the synthesized compounds at various concentrations in chloroform were studied by using absorption and fluorescence studies respectively. The varying rod like morphological features of the synthesized compounds was observed by using scanning electron microscopy, optical microscopy and phase microscopy techniques. Computational studies such as NMR shielding analysis, molecular electrostatic potential (MEP) analysis and natural bonding orbital (NBO) analysis were performed in order to get a better understanding of the synthesized compounds.