ИСТИНА

Triphenylamine (TPA) derivatives are well known photoconducting materials with high hole mobility. TPA-derivatives have been widely investigated as promising materials for organic electronics [1]. Recently a number of star-shaped molecules based on TPA and containing oligothiophene as π-bridges and alkyldycianovinyl groups as acceptor units have been synthesized [2,3,4]. These star-shaped molecules have been widely investigated as one of the most promising materials for organic photovoltaics. However, there is a need to optimize photophysical properties of TPA-based oligomers. In this work, TPA core was modified using carbazole, which is more planar analog of TPA. Also, this work shows the synthesis of a series of oligomers having novel electron donating tris(2-methoxyphenyl)amine core and novel acceptor units –3-ethylrhodanine groups [5]. Besides,we demonstrate series of push-pull unsymmetrical oligomers based on electron-donating TPA and electron-withdrawing dicyanovinyl group. Fig. 1. Schematic representation of star-shaped carbazole-based oligomers (a) and oligomers based on triphenylamine. Variations of parameters of their chemical structures such as type of acceptor and donor groups were used to study the structure-properties relationships in this new type of molecules. This work was supported by Russian Foundation for Basic Research (grant 16-33-01123). The work in the part of synthesis and investigations of star-shaped oligomers was supported by Russian Science Foundation (14-13-01380). 1. Y.N. Luponosov, A.N. Solodukhin, S.A. Ponomarenko, Polymer Science, Ser. C, 2014, 56(1), 105–135. 2. J. Min, Y.N. Luponosov, A. Gerl et al., Adv. Energy Mater., 2014, 4(5), 1301234. 3. S.A. Ponomarenko, Y.N. Luponosov, J. Min et al., Faraday Discuss., 2014, 174, 313-339. 4. O. V. Kozlov , Y. N. Luponosov , S. A. Ponomarenko et al., Adv. Energy Mater. 2015, 5(7), 1401657. 5. Y. N. Luponosov,J. Min,A.N.Solodukhinet al., Organic Electronics, 2016,32,157–168.