Issue 4, 2018

Copper(i) and silver(i) complexes of 9,9-dimethyl-4,5-bis(di-tert-butylphosphino)xanthene: photophysical properties and structural rigidity under pressure

Abstract

The heteroleptic complexes [Cu(tBu-xantphos)(bpy)][PF6] and [Ag(tBu-xantphos)(bpy)][PF6], where tBu-xantphos = 9,9-dimethyl-4,5-bis(di-tert-butylphosphino)xanthene and bpy = 2,2′-bipyridine have been synthesized and their photophysical properties investigated. Single crystal X-ray diffraction studies of the compounds under ambient and increased pressure are presented; increase in pressure results in little structural perturbation. For the copper(I) complexes, the effects of changing the N^N ligand from bpy to 6-methyl-2,2′-bipyridine (6-Mebpy), 6-bromo-2,2′-bipyridine (6-Brbpy), and 4,4′-di(tert-butyl)-2,2′-bipyridine (4,4′-tBu2bpy) were also investigated. Emissions from the copper(I) complexes are weak, both in solution and the solid state and this is attributed to vibrational quenching effects of the tert-butyl substituents of the tBu-xantphos ligands.

Graphical abstract: Copper(i) and silver(i) complexes of 9,9-dimethyl-4,5-bis(di-tert-butylphosphino)xanthene: photophysical properties and structural rigidity under pressure

Supplementary files

Article information

Article type
Paper
Submitted
23 Nov. 2017
Accepted
19 Janv. 2018
First published
19 Febr. 2018

Photochem. Photobiol. Sci., 2018,17, 375-385

Copper(I) and silver(I) complexes of 9,9-dimethyl-4,5-bis(di-tert-butylphosphino)xanthene: photophysical properties and structural rigidity under pressure

S. Keller, A. Prescimone, E. C. Constable and C. E. Housecroft, Photochem. Photobiol. Sci., 2018, 17, 375 DOI: 10.1039/C7PP00432J

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