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Issue 28, 2019
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Pyridyl and pyrimidyl chalcogenolates of coinage metals and their utility as molecular precursors for the preparation of metal chalcogenides

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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

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Article information


Submitted
28 May 2019
Accepted
19 Jun 2019
First published
20 Jun 2019

New J. Chem., 2019,43, 11034-11040
Article type
Perspective

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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