Investigation of Intramolecular Through-Space Charge-Transfer States in Donor–Acceptor Charge-Transfer Systems

Commonly, thermally activated delayed fluorescence (TADF) emitters present a twisted donor–acceptor structure. Here, electronic communication is mediated through-bond via π-conjugation between donor and acceptor groups. A second class of TADF are those where moieties through-space. In these through-space charge-transfer (TSCT) architectures, the groups disposed in pseudocofacial orientation linked bridging group that typically an arene (or heteroarene). most systems, there no direct evidence TSCT dominant contributor to acceptor. Herein we investigate interplay localized excited (LE) (CT) states rationally designed emitter, TPA-ace-TRZ, family model compounds. From our photophysical studies, TPA-ace-TRZ unambiguously confirmed supported by theoretical modeling.