Chimera Diimine Ligands in Emissive [Cu(P^P)(N^N)][PF6] Complexes
Department of Chemistry, University of Basel, BPR 1096, Mattenstrasse 24a, CH-4058 Basel, Switzerland
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Inorganics 2020, 8(5), 33; https://doi.org/10.3390/inorganics8050033
Received: 27 April 2020
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Revised: 7 May 2020
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Accepted: 10 May 2020
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Published: 12 May 2020
(This article belongs to the Special Issue Organometallic and Coordination Compounds for Optical and Energy-Related Applications)
The syntheses and characterizations of the chelating ligand 6-chloro-6′-methyl-2,2′-bipyridine (6-Cl-6′-Mebpy) and of the copper(I) compounds [Cu(POP)(6-Cl-6′-Mebpy)][PF6] and [Cu(xantphos)(6-Cl-6′-Mebpy)][PF6] (POP = bis(2-(diphenylphosphanyl)phenyl)ether and xantphos = 4,5-bis(diphenylphosphanyl)-9,9-dimethyl-9H-xanthene) are described. The single crystal structures of both complexes were determined; the copper(I) ion is in a distorted tetrahedral environment and in [Cu(xantphos)(6-Cl-6′-Mebpy)][PF6], the disorder of the 6-Cl-6′-Mebpy ligand indicates there is no preference of the ‘bowl’-like cavity of the xanthene unit to host either the methyl or chloro-substituent, consistent with comparable steric effects of the two groups. The electrochemical and photophysical properties of [Cu(POP)(6-Cl-6′-Mebpy)][PF6] and [Cu(xantphos)(6-Cl-6′-Mebpy)][PF6] were investigated and are compared with those of the related compounds containing 6,6′-dichloro-2,2′-bipyridine or 6,6′-dimethyl-2,2′-bipyridine ligands. Trends in properties of the [Cu(P^P)(N^N)]+ complexes were consistent with 6-Cl-6′-Mebpy behaving as a combination of the two parent ligands.
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Keywords:
copper(I); bisphosphane; 2,2′-bipyridine; methyl; chloro; photophysics; X-ray diffraction
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MDPI and ACS Style
Meyer, M.; Brunner, F.; Prescimone, A.; Constable, E.C.; Housecroft, C.E. Chimera Diimine Ligands in Emissive [Cu(P^P)(N^N)][PF6] Complexes. Inorganics 2020, 8, 33. https://doi.org/10.3390/inorganics8050033
AMA Style
Meyer M, Brunner F, Prescimone A, Constable EC, Housecroft CE. Chimera Diimine Ligands in Emissive [Cu(P^P)(N^N)][PF6] Complexes. Inorganics. 2020; 8(5):33. https://doi.org/10.3390/inorganics8050033
Chicago/Turabian StyleMeyer, Marco, Fabian Brunner, Alessandro Prescimone, Edwin C. Constable, and Catherine E. Housecroft. 2020. "Chimera Diimine Ligands in Emissive [Cu(P^P)(N^N)][PF6] Complexes" Inorganics 8, no. 5: 33. https://doi.org/10.3390/inorganics8050033
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