ИСТИНА

Nowadays various sulfur-containing heteroaromatic building blocks are successfully used in the synthesis of conjugated organic molecules. Thiophene is a promising structural unit of various linearly conjugated, annulated and branched molecules for organic electronics and photonics.[1] Oligothiophenes are known as efficient organic semiconductors for organic field-effect transistors (OFETs), while thiophene-phenylene co-oligomers (TPCO) possess high luminescence in the films, the field-effect mobility of which can be tuned by their terminal substituents.[2,3] It was shown that a six-ring TPCO with trimethylsilyl end groups is promising for not only for OFETs, but also for light-emitting and photoelectric devices.[4] The highest field-effect mobility can be obtained by annulated structures such as dialkyl derivatives of benzo[b]benzo[4,5]thieno[2,3-d]thiophene (BTBT).[5-7] Annulated thieno-thiophene and thieno-pyrrole fragments are constituents of various non-fullerene acceptors used in efficient organic photovoltaics.[8-10] 2,1,3-Benzothiadiazole is the other very popular sulfur-containing heteroaromatic building block, peculiarities of which include strong accepting ability and high stability. It was used for the synthesis of a number of very efficient linear and branched organic luminophores for various applications.[11-15] Acknowledgements The work was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation (topic of state task No. FFSM-2024-0003). References 1. V.N. Charushin et al., Russ. Chem. Rev. 2024, 93(7), RCR5125. 2. A.Y. Sosorev at. al., J. Phys. Chem. C 2023, 127(36), 17948–17957. 3. D.R. Maslennikov at. al, J. Phys. Chem. C 2024, 128(22), 9364–9375. 4. V.A. Trukhanov at. al., Molecules 2024, 29(11), 2533. 5. I.O. Gudkova at al., Rus. J. Org. Chem. 2024, 60, 1074-1085. 6. M.S. Polinskaya at al., J. Mater. Chem. C 2023, 11, 1937. 7. P.A. Shaposhnik at al. Org. Electron. 2024, 129, 107047. 8. I.V. Dyadishchev at al., Mendeleev Commun. 2023, 33(3), 393-396. 9. E.D. Papkovaksya at. al., Energies 2023, 16(8), 3443. 10. X. Yang at al., Macromolecules 2024, 57(3), 1011–1020. 11. V.A. Postnikov at al., Crystals 2023, 13(12), 1697. 12. V.A. Postnikov at al, ACS Omega 2024, 9(13), 14932–14946. 13. I.V. Dyadishchev at al., Dyes and Pigments, 2024, 224, 112003. 14. L.L. Levkov at al., Mendeleev Commun. 2024, 34(2), 170-173. 15. N.S. Zakharchenko at al., Microbiol. Res. 2024, 15(4), 1957-1972.