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

Abstract : Monometallic gold(I)-alkynyl-helicene complexes (1a,b,) and bimetallic gold(I)-alkynyl-helicene architectures featuring the presence (2a,b) or absence (3a,b) of aurophillic 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) d10-metal center(s) on the electronic, photophysical and chiroptical properties of these unprecedented phosphole-gold(I)-alkynyl-helicene complexes were examined. Experimental and theoretical results highlight the importance of ligand-to-ligand-type charge transfers and the strong effect of presence or absence of Au(I)-Au(I) interactions in 2a,b.
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Mehdi El sayed moussa, Hui Chen, Zuoyong Wang, Monika Srebro-Hooper, Nicolas Vanthuyne, et al.. Bimetallic Gold(I) Complexes with Ethynyl-Helicene and Bis-Phosphole Ligands: Understanding the Role of Aurophilic Interactions in their Chiroptical Properties. Chemistry - A European Journal, Wiley-VCH Verlag, 2016, 22 (17), pp.6075-6086. ⟨10.1002/chem.201600126⟩. ⟨hal-01292929⟩

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