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Updated: May 1, 2026

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
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A Sm(II)-mediated cascade approach to dibenzoindolo[3,2-b]carbazoles: synthesis and evaluation
Matthew T Levick1, Iain Grace, Sheng-Yao Dai
1School of Chemistry, University of Manchester , Oxford Road, Manchester, M13 9PL, U.K.
Abstract:
Previously unstudied dibenzoindolo[3,2-b]carbazoles have been prepared by two-directional, phase tag-assisted synthesis utilizing a connective-Pummerer cyclization and a SmI2-mediated tag cleavage-cyclization cascade. The use of a phase tag allows us to exploit unstable intermediates that would otherwise need to be avoided. The novel materials were characterized by X-ray, cyclic voltammetry, UV-vis spectroscopy, TGA, and DSC. Preliminary studies on the performance of OFET devices are also described.
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