Article
Dinuclear Cu(I) Halides with Terphenyl Phosphines: Synthesis, Photophysical Studies, and Catalytic Applications in CuAAC Reactions
Author/s | Beltrán, Álvaro
Gata, Inmaculada Maya Díaz, Celia María Avó, João Lima, João Carlos Laia, César A.T. Peloso, Riccardo Outis, Mani Nicasio Jaramillo, María del Carmen |
Department | Universidad de Sevilla. Departamento de Química Inorgánica |
Publication Date | 2020 |
Deposit Date | 2023-02-27 |
Published in |
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Abstract | Several dinuclear terphenyl phosphine copper(I) halide complexes of composition [CuX(PR2Ar′)]2 (X = Cl, Br, I; R = hydrocarbyl, Ar′ = 2,6-diarylterphenyl radical), 1-5, have been isolated from the reaction of CuX with 1 ... Several dinuclear terphenyl phosphine copper(I) halide complexes of composition [CuX(PR2Ar′)]2 (X = Cl, Br, I; R = hydrocarbyl, Ar′ = 2,6-diarylterphenyl radical), 1-5, have been isolated from the reaction of CuX with 1 equiv of the phosphine ligand. Most of them have been characterized by X-ray diffraction studies in the solid state, thus allowing comparative discussions of different structural parameters, namely, Cu···Cu and Cu···Aryl separations, conformations adopted by coordinated phosphines, and planarity of the Cu2X2 cores. Centrosymmetric complexes [CuI(PMe2ArXyl2)]2, 1c, and [CuI(PEt2ArMes2)]2, 3c, despite their similar structures, show very distinct photoluminescence (PL) in powder form at room temperature. The photophysical behavior of these compounds in liquid solution, solid-solid Zeonex solution and powder samples at room temperature and 77 K have been investigated and supported by DFT calculation. Identification of vibronic coupling modes, done by group theory calculations and the technique of projection operators, shows that the manifestation of these modes is conditioned by crystal packing. Complexes [CuI(PMe2ArXyl2)]2, 1c, and [CuI(PEt2ArMes2)]2, 3c, display remarkable activity in copper-catalyzed azide-alkyne cycloaddition reactions involving preformed and in situ-made azides. Reactions are performed in H2O, under aerobic conditions, with low catalyst loadings and tolerate the use of iodoalkynes as substrates. |
Funding agencies | Ministerio de Economia, Industria y Competitividad (MINECO). España Associate Laboratory for Green Chemistry-LAQV - FCT/MCTES Fundação para a Ciência e a Tecnologia. Portugal |
Project ID. | CTQ2014-52769-C3-3-R
CTQ2017-82893-C2-2-R CTQ2016-75193-P UIDB/50006/2020 SFRH/BD/120985/2016 SFRH/BPD/120599/2016 PTDC/QUI-QFI/32007/2017 |
Citation | Beltrán, Á., Gata, I., Maya Díaz, C.M., Avó, J., Lima, J.C., Laia, C.A.T.,...,Nicasio Jaramillo, M.d.C. (2020). Dinuclear Cu(I) Halides with Terphenyl Phosphines: Synthesis, Photophysical Studies, and Catalytic Applications in CuAAC Reactions. Inorganic Chemistry, 59 (15), 10894-10906. https://doi.org/10.1021/acs.inorgchem.0c01397. |
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