|
|||||
|
|
Formation of luminescent states in polybenzimidazole-based films |
|
| Authors: | Anastasiya Akovantseva Svetlana Kotova Oleg Gromov Vitaliy Burdukovskii Bato Kholkhoev Peter Timashev Vladimir Yusupov Аleksey Rybaltovsky |
| Institution: | 1. Institute of Photonic Technologies, Federal Scientific Research Centre "Crystallography and Photonics" of RAS, Troitsk, Moscow, Russia;2. Department of Polymers and Composites, N.N.Semenov Institute of Chemical Physics of RAS, Moscow, Russia;3. Division of Chemical Kinetics, Department of Chemistry, Moscow State University, Moscow, Russia;4. Laboratory of Polymer Chemistry, Baikal Institute of Nature Management, Ulan-Ude, Russia;5. Division of Physical Problems of Quantum Electronics, Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, Russia |
| Abstract: | Here we present the results of experimental studies and theoretical computations of the spectroscopic parameters of polybenzimidazole (PBI) films formed by casting from a formic acid solution. The kinetics of the polymer luminescence is described, depending on the amount of the residual solvent. We demonstrate the changes in the intensity of the film luminescence with the formic acid release from the film, which is confirmed by the IR data. Based on the quantum chemistry computations, a mechanism is suggested for the formation of absorption and luminescence bands characteristic of the PBI matrix. |
| Keywords: | density functional theory IR luminescence OPBI polybenzimidazole |