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.

中文翻译：

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聚苯并咪唑基薄膜中发光态的形成

在这里，我们介绍由甲酸溶液浇铸而成的聚苯并咪唑（PBI）薄膜的光谱参数的实验研究和理论计算结果。描述了聚合物发光的动力学，这取决于残余溶剂的量。我们证明了随着薄膜中甲酸的释放，薄膜发光强度的变化，这通过红外数据得到了证实。基于量子化学计算，提出了形成PBI基质特征吸收和发光带的机制。