Bimetallic Gold(I) Complexes with Ethynyl-Helicene and Bis-Phosphole Ligands: Understanding the Role of Aurophilic Interactions in their Chiroptical Properties.

Authors :: El Sayed Moussa M
Chen H
Wang Z
Srebro-Hooper M
Vanthuyne N
Chevance S
Roussel C
Williams JA
Autschbach J
Réau R
Duan Z
Lescop C
Crassous J
Source :: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2016 Apr 18; Vol. 22 (17), pp. 6075-86. Date of Electronic Publication: 2016 Mar 23.
Publication Year :: 2016
Abstract: Monometallic gold(I)-alkynyl-helicene complexes (1 a,b) and bimetallic gold(I)-alkynyl-helicene architectures featuring the presence (2 a,b) or absence (3 a,b) of aurophilic intramolecular interactions were prepared by using different types of phosphole ligands (mono-phosphole L1 or bis-phospholes L2,3). The influence of the Au(I) d(10) metal center(s) on the electronic, photophysical, and chiroptical properties of these unprecedented phosphole-gold(I)-alkynyl-helicene complexes was examined. Experimental and theoretical results highlight the importance of ligand-to-ligand-type charge transfers and the strong effect of the presence or absence of Au(I) -Au(I) interactions in 2 a,b.<br /> (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

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