Emissive silver(<scp>i</scp>) cyclic trinuclear complexes with aromatic amine donor pyrazolate derivatives: way to efficiency

Emashova, Sofiia; Titov, Aleksei A.; Smol’yakov, Alexander F.; Chernyadyev, Andrey Yu.; Godovikov, Ivan A.; Godovikova, M. I.; Dorovatovskii, Pavel V.; Korlyukov, Аlexander А.; Filippov, Oleg A.; Shubina, Elena S.

doi:10.1039/d2qi01648f

Cited by 5 publications

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“…Such spectral behavior demonstrates the possibility of complex dissociation at this concentration. Previously, it was shown that the composition of trinuclear silver(I) pyrazolate complexes depends on the concentration [ 54 , 55 ]. The formation of aggregated complexes (trinuclear) is preferred at a concentration higher than 7 × 10 −3 M, but at lower concentrations (up to ~5 × 10 −4 M), dissociated metal–pyrazolate adducts form (mononuclear salts).…”

Section: Resultsmentioning

confidence: 99%

Tetranuclear Copper(I) and Silver(I) Pyrazolate Adducts with 1,1′-Dimethyl-2,2’-bibenzimidazole: Influence of Structure on Photophysics

et al. 2023

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A reaction of a cyclic trinuclear copper(I) or silver(I) pyrazolate complex ([MPz]3, M = Cu, Ag) with 1,1′-dimethyl-2,2’-bibenzimidazole (L) leads to the formation of tetranuclear adducts decorated by one or two molecules of a diimine ligand, depending on the amount of the ligand added (0.75 or 1.5 equivalents). The coordination of two L molecules stabilizes the formation of a practically idealized tetrahedral four-metal core in the case of a copper-containing complex and a distorted tetrahedron in the case of a Ag analog. In contrast, complexes containing one molecule of diimine possess two types of metals, two- and three-coordinated, forming the significantly distorted central M4 cores. The diimine ligands are twisted in these complexes with dihedral angles of ca. 50–60°. A TD-DFT analysis demonstrated the preference of a triplet state for the twisted 1,1′-dimethyl-2,2’-bibenzimidazole and a singlet state for the planar geometry. All obtained complexes demonstrated, in a solution, the blue fluorescence of the ligand-centered (LC) nature typical for free diimine. In contrast, a temperature decrease to 77 K stabilized the structure close to that observed in the solid state and activated the triplet states, leading to green phosphorescence at ca. 500 nm. The silver-containing complex Ag4Pz4L exhibited dual emission from both the singlet and triplet states, even at room temperature.

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Section: Resultsmentioning

confidence: 99%

Tetranuclear Copper(I) and Silver(I) Pyrazolate Adducts with 1,1′-Dimethyl-2,2’-bibenzimidazole: Influence of Structure on Photophysics

et al. 2023

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“…[18][19][20] Varying the substituents in pyrazolate anions allows influence on the photophysical behaviour. 21 The interaction of terminal alkynes with Cu(I) cyclic trinuclear pyrazolate complexes is realized via Z 2 -copper/alkyne triple bond coordination. 22,23 This is accompanied by the rearrangement of the central M-N core.…”

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Pyrazolate vs. phenylethynide: direct exchange of the anionic bridging ligand in a cyclic trinuclear silver complex

Titov,

Smol’yakov,

Chernyadyev

et al. 2024

Chem. Commun.

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A PYRIMIDINE-DERIVED DIPHOSPHINE P-MONOXIDE AND A Ag(I) COORDINATION POLYMER THEREOF: SYNTHESIS, STRUCTURE, AND LUMINESCENCE

Davydova

Bagryanskaya²,

Sadykov³

et al. 2022

J Struct Chem

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Emissive silver(i) cyclic trinuclear complexes with aromatic amine donor pyrazolate derivatives: way to efficiency

Abstract: 3-trifluoromethyl-pyrazoles containing strong fluorophore groups: triphenylamine (TPAPz) and carbazole (CarbPz), and their trinuclear silver(I) complexes are found to be emissive in solution and the solid state, giving the first example...

Cited by 5 publications

References 50 publications

Tetranuclear Copper(I) and Silver(I) Pyrazolate Adducts with 1,1′-Dimethyl-2,2’-bibenzimidazole: Influence of Structure on Photophysics

Tetranuclear Copper(I) and Silver(I) Pyrazolate Adducts with 1,1′-Dimethyl-2,2’-bibenzimidazole: Influence of Structure on Photophysics

Pyrazolate vs. phenylethynide: direct exchange of the anionic bridging ligand in a cyclic trinuclear silver complex

A PYRIMIDINE-DERIVED DIPHOSPHINE P-MONOXIDE AND A Ag(I) COORDINATION POLYMER THEREOF: SYNTHESIS, STRUCTURE, AND LUMINESCENCE

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