Premium
Crystal packing control of a trifluoromethyl‐substituted furan/phenylene co‐oligomer
Author(s) -
Sonina Alina A.,
Koskin Igor P.,
Sherin Peter S.,
Rybalova Tatyana V.,
Shundrina Inna K.,
Mostovich Evgeny A.,
Kazantsev Maxim S.
Publication year - 2018
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
ISSN - 2052-5206
DOI - 10.1107/s2052520618011782
Subject(s) - phenylene , furan , oligomer , trifluoromethyl , crystallography , crystallization , materials science , intermolecular force , crystal (programming language) , single crystal , photoluminescence , solvent , chemistry , polymer chemistry , organic chemistry , molecule , polymer , alkyl , optoelectronics , computer science , programming language
Furan/phenylene co‐oligomer single crystals are considered as future materials for organic optoelectronics. Here, the effects of trifluoromethyl substituents on the crystallization, structure and optical properties of furan/phenylene co‐oligomer 1,4‐bis{5‐[4‐(trifluoromethyl)phenyl]furan‐2‐yl}benzene are studied systematically. The solution growth methods and physical vapor transport result in the formation of three polymorphs depending on the growth method and the solvent. Single‐crystal X‐ray analysis reveals the crystal structures to correspond to H‐, J‐ or mixed aggregates. All obtained crystals exhibit high photoluminescence efficiency and have optical properties which strongly depend on the crystal packing. Variable‐temperature X‐ray powder diffraction analysis shows the thermal transition of two forms (H‐ and J‐aggregates) into a third one (mixed aggregate). Terminal trifluoromethyl groups induce weak intermolecular interactions which control the crystal packing and optical properties of co‐oligomer single crystals.