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Novel Luminescent homo/heterometallic platinum(II) alkynyl complexes based on a Y-shaped pyridyl diphosphine

Abstract

A series of dinuclear platinum(II) alkynyl complexes [Pt2L2(C≡CC6H4R-4)4] (R=H 1, CH3 2, But 3), and unusual tetranuclear Pt(II)–Ag(I) clusters [Pt2Ag2L(C≡CC6H4R-4)6] (R=H, 4; CH3, 5; But, 6), together with novel polymer crystals [Pt2Ag2L(C≡CC6H5)6]∞ ([4]∞), were synthesized by the self-assembly reaction between [NBu4]2[Pt(C≡CC6H4-R-4)4] and [Ag6L6]6+(L = 4-(3,5-(diphenylphosphine)phenyl)pyridine). These complexes were characterized by using a range of spectroscopic and X-ray crystallography for complexes 1, 3, 5, and [4]∞. Each platinum atom of the Pt(II)–Ag(I) clusters exhibits an unusual asymmetric distorted square planar geometry with three alkynyl groups and one bridging L phosphous atom. Dinuclear complexes 1-3 demonstrate solid-state weak blue luminescence, while tetranuclear Pt(II)–Ag(I) clusters 4-6 show intense blue-green or yellow-green emission. Furthermore, crystalline samples of the polymer [4]∞ display a bright yellow emission (518 nm) that is significantly red-shifted as compared to monomer crystal 4.

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Supplementary files

Article information


Submitted
28 Mar 2020
Accepted
08 May 2020
First published
12 May 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

Novel Luminescent homo/heterometallic platinum(II) alkynyl complexes based on a Y-shaped pyridyl diphosphine

L. Han, X. Wu, Z. Ma, L. Yi and Q. Wei, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/D0DT01173H

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