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Luminescent heteroleptic copper(I) complexes with polydentate benzotriazolyl-based ligands

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Abstract

Bis(benzotriazol-1-yl)phenylmethane CHPh(btz)2 and tris(benzotriazol-1-yl)methane CH(btz)3 were used as N-donor ligands to prepare luminescent heteroleptic copper(I) complexes. [Cu{CHPh(btz)2}(PPh3)2][BF4] and [Cu{CHPh(btz)2}(DPEphos)][BF4] (DPEphos = bis[(2-diphenylphosphino)phenyl] ether) were obtained from the corresponding borohydride complexes [Cu(BH4)(PPh3)2] and [Cu(BH4)(DPEphos)] and tetrafluoroboric acid. [Cu{CH(btz)3}(PPh3)][BF4] and [Cu{CH(btz)3}(PiPr3)][BF4] were prepared from the acetonitrile complex [Cu(NCCH3)4][BF4]. The complexes exhibited bright yellow or orange emissions upon excitation with near-UV and violet light. The photoluminescent properties were attributed to metal-to-ligand charge transfer transitions on the basis of experimental data and DFT calculations.

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Acknowledgements

CACTI (University of Vigo) is gratefully acknowledged for X-ray data collection. We acknowledge Università Ca’ Foscari Venezia for financial support (Bando Spin 2018, D. R. 1065/2018 prot. 67416) and CINECA (COLUMN project 2020) for the availability of computing resources.

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  1. Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, Via Torino 155, Mestre (Ve), 30172, Italy

    Valentina Ferraro & Marco Bortoluzzi

  2. Departamento de Química Inorgánica, Universidade de Vigo, Edificio de Ciencias Experimentais, Vigo, 36310, Galicia, Spain

    Jesús Castro

  3. Aimplas, Plastic Technology Center, Valencia Parc Tecnologic, Valencia Parc Tecnologic, C/Gustave Eiffel, 4, 46011, Valencia, Spain

    Lodovico Agostinis

  4. Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), via Celso Ulpiani 27, 70126, Bari, Italy

    Marco Bortoluzzi

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Ferraro, V., Castro, J., Agostinis, L. et al. Luminescent heteroleptic copper(I) complexes with polydentate benzotriazolyl-based ligands. Transit Met Chem 46, 391–402 (2021). https://doi.org/10.1007/s11243-021-00458-4

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