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Photoelectron Properties and Paramagnetism of Polyimides Based on N,N,N’,N’-substituted p-Phenilenediamine and Dianhydrides

Der Liaw1, Ying Huang1, Cheng Chang1, Boris Rumyantsev2, Tat’yana Lozinova2, Vitaly Zubov3, Anatoly Olkhov4, Victor Bagratashvili5, Gennady Zaikov2 and Anatoly Ischenko3
Affiliation: 
1Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan 2Emanuel Institute of Biochemical Physics, RAS, Moscow 119991, Russia 3Moscow Lomonosov State University of Fine Chemical Technologies, Moscow 119571, Russia 4Plekhanov Russian University of Economics, Moscow 117997, Russia aolkhov72@yandex.ru aischenko@yasenevo.ru 5Institute on Laser and Information Technologies, RAS, Troitsk, Moscow 142190, Russia
DOI: 
https://doi.org/10.23939/chcht09.04.445
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Keywords:

Abstract: 
The photoelectric characteristics and paramagnetic properties of newly synthesized polyimides (PI) have been investigated using the electrophotographic method and an ESR signal study. The polyimides based on N,N,N',N'-substituted p-phenylenediamine and dianhydrides, were prepared via polycondensation. The polymers exhibit excellent solubility in common organic solvents, and have high thermal stability. The PI films exhibit photoelectric sensitivity in the UV, and visible spectral regions. The mechanism of photogeneration has been investigated. Paramagnetism of the air stored PI samples has been determined by the air oxidized PI donor fragments (stable radicals). PI ESR spectra in a solid state and solution have been investigated as well as the effect of light excitation on those spectra.
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