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Phan TA, Jouffroy M, Matt D, Armaroli N, Moncada AS, Bandini E, Delavaux-Nicot B, Nierengarten JF, Armspach D. Stabilization of Luminescent Mononuclear Three-Coordinate Cu I Complexes by Two Distinct Cavity-Shaped Diphosphanes Obtained from a Single α-Cyclodextrin Precursor. Chemistry 2024; 30:e202302750. [PMID: 37996997 DOI: 10.1002/chem.202302750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/27/2023] [Accepted: 11/20/2023] [Indexed: 11/25/2023]
Abstract
Slightly different reaction conditions afforded two distinct cavity-shaped cis-chelating diphosphanes from the same starting materials, namely diphenyl(2-phosphanylphenyl)phosphane and an α-cyclodextrin-derived dimesylate. Thanks to their metal-confining properties, the two diphosphanes form only mononuclear [CuX(PP)] complexes (X=Cl, Br, or I) with the tricoordinated metal ion located just above the center of the cavity. The two series of CuI complexes display markedly different luminescence properties that are both influenced by the electronic properties of the ligand and the unique steric environment provided by the cyclodextrin (CD) cavity. The excited state lifetimes of all complexes are significantly longer than those of the cavity-free analogues suggesting peculiar electronic effects that affect radiative deactivation constants. The overall picture stemming from absorption and emission data suggests close-lying charge-transfer (MLCT, XLCT) and triplet ligand-centered (LC) excited states.
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Affiliation(s)
- Tuan-Anh Phan
- Équipe Confinement Moléculaire et Catalyse, Institut de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, CS90032, 67081, Strasbourg cedex, France
- Laboratoire de Chimie des Matériaux Moléculaires, Université de Strasbourg et CNRS (LIMA - UMR 7042), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087, Strasbourg cedex 2, France
| | - Matthieu Jouffroy
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse, Institut de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, CS90032, 67081, Strasbourg cedex, France
| | - Dominique Matt
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse, Institut de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, CS90032, 67081, Strasbourg cedex, France
| | - Nicola Armaroli
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, 40129, Bologna, Italy
| | - Alejandra Saavedra Moncada
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, 40129, Bologna, Italy
| | - Elisa Bandini
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, 40129, Bologna, Italy
| | - Béatrice Delavaux-Nicot
- Laboratoire de Chimie de Coordination du CNRS (LCC), UPR 8241, Université de Toulouse (UPS), 205 route de Narbonne, 31077, Toulouse cedex 4, France
| | - Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires, Université de Strasbourg et CNRS (LIMA - UMR 7042), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087, Strasbourg cedex 2, France
| | - Dominique Armspach
- Équipe Confinement Moléculaire et Catalyse, Institut de Chimie de Strasbourg, UMR 7177 CNRS, Université de Strasbourg, 4 rue Blaise Pascal, CS90032, 67081, Strasbourg cedex, France
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