Issue 28, 2019

Pyridyl and pyrimidyl chalcogenolates of coinage metals and their utility as molecular precursors for the preparation of metal chalcogenides

Abstract

2-/4-Pyridyl chalcogenolates (S, Se and Te) and 2-(4,6-dimethyl)pyrimidyl selenolate complexes of coinage metals (Cu, Ag and Au), with and without phosphine ligands, such as [Cu(Epy)]4 (E = Se or Te), [Cu(Sepym)]6, [Ag2(μ-Spy)2(PPh3)4], [Ag3(μ-Sepy)3(PPh3)4] and [Ag(EAr)]6, [Au(SeAr)(PR3)], etc., have been synthesised and characterized unambiguously by single crystal X-ray diffraction analyses. The silver phosphine complexes undergo phosphine dissociation in solution to yield a variety of complexes, [Ag2(μ-Spy)2(PPh3)4], [Ag3(μ-Sepy)3(PPh3)4] and [Ag(Epy)]6. These complexes, depending on the nature of the ligands, exhibit metallophilic interactions in the solid state. Thermolysis of copper and silver complexes in coordinating solvents yields metal selenide nano-crystals. AACVD of [Cu(EpyMe)]4 (E = Se or Te) has been used to deposit continuous and uniform films of Cu5Se4 and Cu1.85Te on a glass substrate. The copper complexes in combination with an appropriate indium or tin precursor have also been used for the preparation of phase pure ternary compounds like CuInSe2 and Cu2SnSe3.

Graphical abstract: Pyridyl and pyrimidyl chalcogenolates of coinage metals and their utility as molecular precursors for the preparation of metal chalcogenides

Article information

Article type
Perspective
Submitted
28 may 2019
Accepted
19 iyn 2019
First published
20 iyn 2019

New J. Chem., 2019,43, 11034-11040

Pyridyl and pyrimidyl chalcogenolates of coinage metals and their utility as molecular precursors for the preparation of metal chalcogenides

V. K. Jain, New J. Chem., 2019, 43, 11034 DOI: 10.1039/C9NJ02769F

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