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Updated: May 4, 2026

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
2,5-Bis{[(-)-(S)-1-(4-methyl-phen-yl)eth-yl]imino-meth-yl}thio-phene
Sylvain Bernès1, Guadalupe Hernández-Téllez2, Manju Sharma3
1DEP Facultad de Ciencias Químicas, UANL, Guerrero y Progreso S/N, Col. Treviño, 64570 Monterrey, NL, Mexico.
Abstract:
The title chiral bis-aldimine, C24H26N2S, was synthesized using a solvent-free Schiff condensation. The mol-ecule displays crystallographic C 2 symmetry, with the S atom lying on the twofold axis parallel to [100]. As a consequence of the (S,S) stereochemistry, the tolyl groups are oriented towards opposite faces of the thiophene core, giving a twisted conformation for the whole mol-ecule. Mol-ecules are arranged in the crystal in a herringbone-like pattern, without any significant inter-molecular contacts.
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