Abstract: A new Ag(I) complex based on tris(2-pyridyl)phosphine (Py3P), [Ag-2(Py3P)(3)(SCN)(2)], has been synthesized and chemically characterized. Theoretical calculations and photophysical investigations reveal thermally activated delayed fluorescence (TADF) coupled with outstanding solvato- and vapor-luminescent behavior. The parent complex [Ag-2(Py3P)(3)(SCN)(2)] shows sky-blue TADF (lambda(max) = 469 nm) at ambient temperature with a quantum yield of Phi(PL) = 16% and an emission decay time of 2.2 mu s. Upon exposing the complex to CH2Cl2 or CHCl3 vapors, [Ag-2(Py3P)(3)(SCN)(2)]center dot 0.66CH(2)Cl(2) and [Ag-2(Py3P)(3)(SCN)(2)]center dot CHCl3 solvates are formed. This process is accompanied by a strong enhancement of the luminescence intensity. Both solvates also emit sky-blue TADF (lambda(max) = 478-483 nm), but the emission quantum yield reaches Phi(PL) approximate to 70% at an emission decay time of 9-12 mu s, depending on the solvent. According to DFT/TD-DFT computations, the observed TADF originates from a (1)(M + X)LCT excited state. The experimentally determined Delta E(S-1 - T-1) gap for [Ag-2(Py3P)(3)(SCN)(2)]center dot 0.66CH(2)Cl(2) is relatively large and amounts to 1040 cm(-1) (approximate to 129 meV).

Cite: Artem'ev A.V. , Shafikov M.Z. , Schinabeck A. , Antonova O.V. , Berezin A.S. , Bagryanskaya I.Y. , Plusnin P.E. , Yersin H.
Sky-blue thermally activated delayed fluorescence (TADF) based on Ag(I) complexes: strong solvation-induced emission enhancement
Inorganic Chemistry Frontiers. 2019. V.6. N11. P.3168-3176. DOI: 10.1039/c9qi01069f WOS Scopus РИНЦ OpenAlex

Identifiers:

Web of science:	WOS:000512754200019
Scopus:	2-s2.0-85074638062
Elibrary:	41682597
OpenAlex:	W2974369181

Citing:

DB	Citing
Web of science	54
Scopus	50
Elibrary	49
OpenAlex	57

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