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

Mehdi El Sayed Moussa; Hui Chen; Zuoyong Wang; Monika Srebro-Hooper; Nicolas Vanthuyne; Soizic Chevance; Christian Roussel; J A Gareth Williams; Jochen Autschbach; Régis Réau; Zheng Duan; Christophe Lescop; Jeanne Crassous

doi:10.1002/chem.201600126

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

Chemistry. 2016 Apr 18;22(17):6075-86. doi: 10.1002/chem.201600126. Epub 2016 Mar 23.

Authors

Affiliations

¹ Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.
² College of Chemistry and Molecular Engineering, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, Zhengzhou, 450001, P.R. China.
³ Institute of Chemistry Henan, Academy of Sciences, Zhengzhou, 450002, P.R. China.
⁴ Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060, Krakow, Poland.
⁵ Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France.
⁶ Department of Chemistry, University of Durham, Durham, DH1 3LE, UK.
⁷ Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260, USA. jochena@buffalo.edu.
⁸ College of Chemistry and Molecular Engineering, International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, Zhengzhou University, Zhengzhou, 450001, P.R. China. duanzheng@zzu.edu.cn.
⁹ Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France. christophe.lecop@univ-rennes1.fr.
¹⁰ Institut des Sciences Chimiques de Rennes, UMR 6226, CNRS-Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France. jeanne.crassous@univ-rennes1.fr.

PMID: 27004565
DOI: 10.1002/chem.201600126

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.

Keywords: aurophilic interactions; circular dichroism; gold; helicenes; phospholes.

Publication types

Research Support, Non-U.S. Gov't