Abstract: A suite of paddle-wheel shaped [Cu2(PymPPh2)3(Lan)n](PF6)2 complexes showing efficient thermally activated delayed fluorescence (TADF) has been synthesized. In these complexes, Cu(I) ions are P,N-bridged by three diphenyl(2-pyrimidyl)phosphine (PymPPh2, L) ligands in a “head-to-tail” fashion, and one or both metals are also capped by the ancillary ligand (Lan = MeOH, Me2CO, MeCN, PhCN). At ambient temperature, the solid complexes emit TADF with the quantum yield of up to 85% and the lifetimes of from 9.6 to 27 μs. The ancillary ligands, whose orbitals negligibly contribute to the radiative 1(M + L + Lan)LCT state, remarkably adjust emission energies and ΔE(S1–T1) energy splitting magnitudes of the emitters obtained. Thus, depending on structure and/or number of the Lan molecules, the emission maxima vary from 500 to 563 nm, and the ΔE(S1–T1) gaps range 550–1100 cm–1. Such tunable TADF characteristics coupled with the excellent solubility and air-stability make the complexes presented to be promising TADF materials.

Cite: Artem’ev A.V. , Davydova M.P. , Berezin A.S. , Ryzhikov M.R. , Samsonenko D.G.
Dicopper(I) Paddle-Wheel Complexes with Thermally Activated Delayed Fluorescence Adjusted by Ancillary Ligands
Inorganic Chemistry. 2020. V.59. N15. P.10699-10706. DOI: 10.1021/acs.inorgchem.0c01171 WOS Scopus OpenAlex

Dates:

Submitted:	Apr 21, 2020
Published online:	Jul 20, 2020

Identifiers:

Web of science:	WOS:000558727500035
Scopus:	2-s2.0-85089454940
OpenAlex:	W3042516810

Citing:

DB	Citing
OpenAlex	44
Scopus	44
Web of science	45

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