Abstract: Single crystals of furan/phenylene co-oligomers are among the most promising highly-emissive materials for applications in various optoelectronic devices. In this work, we synthesized and studied furan/phenylene co-oligomers with the same conjugated core 1,4-bis(5-phenylfuran-2-yl) benzene and methyl substituents at p-and m-positions of the terminal phenyls. The effect of substituents on the crystal packing, charge transport and luminescence of the single crystals was studied. Compared to the unsubstituted compound, the methyl-substituted co-oligomers demonstrated improved thermostability and enhanced photoluminescence, which we assign to J-aggregation resulting from the strong inclination of the molecules against the main crystal facet. The charge mobility in single crystal organic field-effect transistors decreased upon the inclination of the molecules. We conclude that the molecular tilt angle, intermolecular distances and interactions in crystals of heteroaryl-containing linear conjugated oligomers can be controlled by the introduction of end methyl groups in the appropriate positions.

Cite: Kazantsev M.S. , Beloborodova A.A. , Frantseva E.S. , Rybalova T.V. , Konstantinov V.G. , Shundrina I.K. , Paraschuk D.Y. , Mostovich E.A.
Methyl substituent effect on structure, luminescence and semiconducting properties of furan/phenylene co-oligomer single crystals
CrystEngComm. 2017. V.19. N13. P.1809-1815. DOI: 10.1039/c6ce02565j WOS Scopus РИНЦ

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Web of science	WOS:000397881700012
Scopus	2-s2.0-85016400851
Elibrary	29497552
OpenAlex	W2592459832

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