Details

Autor(en) / Beteiligte

• Vinogradova, K. A.
• Rakhmanova, M. I.
• Nikolaenkova, E. B.
• Krivopalov, V. P.
• Bushuev, M. B.
• Pervukhina, N. V.
• Naumov, D. Yu
• Martynova, S. A.

Titel

Synthesis, Structure, and Photoluminescence of Zinc(II) and Silver(I) Complexes with 2-(3,5-Dimethyl-1H-pyrazol-1-yl)-4,6-Diphenylpyrimidine

Ist Teil von

• Russian journal of coordination chemistry, 2022-05, Vol.48 (5), p.301-310

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The complexes [AgL 2 ]PF 6 ( I ) and [ZnLCl 2 ] ( II ) (L = 2-(3,5-dimethyl-1 H -pyrazol-1-yl)-4,6-diphenylpyrimidine) were prepared by the reaction of zinc(II) chloride or silver(I) hexafluorophosphate with L (M : L molar ratio of 1 : 1 or 1 : 2) in organic solvents. The structure of the complexes was determined by X-ray diffraction (CIF file CCDC no. 2118498). In both complexes, L is coordinated in the bidentate chelating manner; the coordination unit is a distorted tetrahedron. The coordination unit of II is formed by one coordinated molecule L and two chloride ions (ZnN 2 Cl 2 ); in the case of silver(I), there are two molecules L (AgN 4 ). The photoluminescent properties of compounds I and II in the solid state were studied. The compound II shows fluorescence (1.3, 11 ns) in the blue spectral range (λ max = 378 nm; quantum yield of 7.8%). The maximum at 530 nm in the photoluminescence spectrum of I is red-shifted by ~140–160 nm relative to the emission maxima of L and II . The complex I shows white light emission (1.6, 11 ns, quantum yield of 5.5%), which is due to intraligand transitions perturbed by the coordination of L to the silver atom. The photostability of I was studied at 300 and 80 K.