@inproceedings{e7a40177cca44d56b41c927d3f902c8a,
title = "Symmetrical versus asymmetrical molecular configuration in metal-assisted-through-space charge transfer TADF",
abstract = "The synthesis of a novel imidazolidine type N-heterocyclic carbene (NHC) Cu (I) complex with asymmetrically attached phenylsulfonyl- acceptor group is presented. The asymmetrical ligand was used for the preparation two Cu(I) carbene-metal-amide (CMA) complexes with carbazolide (complex 1) or 1,8-dimethylcarbazolide (complex 2) as the amide donors. Obtained complexes exhibit efficient thermally activated delayed fluorescence (TADF) with luminescence quantum yields (QY) reaching 0.80 in PMMA matrix. Metal promoted through-space charge transfer approach in the emitter design lowers the ?EST gap and the small spin-orbit coupling (SOC) provided by metal atom enables high radiative rates (kr = 2.21×105 s-1 for complex 2). The photophysical properties of the asymmetrical (1-2) and previously reported symmetrical (3-6) molecular designs are compared. Obtained results suggest a closely similar photophysical behavior for both the asymmetrical and symmetrical CMA complexes.",
keywords = "carbene-metal-amides, N-heterocyclic carbenes, Thermally activated delayed fluorescence, through-space charge transfer",
author = "Armands Ruduss and Zanis Sisojevs and Aivars Vembris and Kitija Stucere and Kaspars Traskovskis",
note = "Publisher Copyright: {\textcopyright} 2022 SPIE",
year = "2022",
doi = "10.1117/12.2620983",
language = "English",
isbn = "9781510651746",
volume = "12149",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
editor = "Sebastian Reineke and Koen Vandewal and Wouter Maes",
booktitle = "Organic Electronics and Photonics",
}