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Issue 31, 2016
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Unexpected formation of a fused double cycle trinuclear gold(i) complex supported by ortho-phenyl metallated aryl-diphosphine ligands and strong aurophilic interactions

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Abstract

The first homoleptic trinuclear arylgold(I) complex, [Au3(L′)2](NO3) (3), based on an ortho-phenyl metallated aryl-diphosphine ligand (L′ = o-C6H4PPh(C15H10O)PPh2), has been obtained through a new thermolytic reaction of the corresponding diauracycle, [Au2(L)2](NO3)2 (L = xantphos). The formation of 3 involves activation of the ortho-phenyl C–H bond of the xantphos ligands. The presence of Au–C bonds in this new gold-diphosphine cluster is not its only remarkable feature, since it also displays two 12-membered rings fused together and a linear {Au3} chain with aurophilic interactions. Complex 3 exhibits strong sky-blue luminescence that can be assigned to a triplet metal–metal (3MM) transition partially mixed with a ligand-to-metal–metal charge transfer (3LMMCT) transition related to the aurophilic bonding. This [Au3(L′)2]+ triauracycle also shows AIEE-activity, and is a selective luminescent chemosensor for metal ions.

Graphical abstract: Unexpected formation of a fused double cycle trinuclear gold(i) complex supported by ortho-phenyl metallated aryl-diphosphine ligands and strong aurophilic interactions

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Supplementary files

Article information


Submitted
20 Apr 2016
Accepted
08 Jul 2016
First published
08 Jul 2016

Dalton Trans., 2016,45, 12569-12575
Article type
Paper
Author version available

Unexpected formation of a fused double cycle trinuclear gold(I) complex supported by ortho-phenyl metallated aryl-diphosphine ligands and strong aurophilic interactions

C. Jobbágy, P. Baranyai, P. Szabó, T. Holczbauer, B. Rácz, L. Li, P. Naumov and A. Deák, Dalton Trans., 2016, 45, 12569
DOI: 10.1039/C6DT01528J

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