Browsing by Author "Cabrera, Alan R."

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    Air- and Water-Stable Heteroleptic Copper (I) Complexes Bearing Bis(indazol-1-yl)methane Ligands: Synthesis, Characterisation, and Computational Studies
    (2023) Moreno Da Costa, David Ricardo Rafael; Zúñiga-Loyola, César; Droghetti, Federico; Robles, Stephania; Alondra Villegas-Menares; Villegas, Nery Andres; Gonzalez-Pavez, Iván; Molins, Elies; Natali, Mirco; Cabrera, Alan R.; Boucekkine, Abdou
    A series of four novel heteroleptic Cu(I) complexes, bearing bis(1H-indazol-1-yl)methaneanalogues as N,N ligands and DPEPhos as the P,P ligand, were synthesised in high yields undermild conditions and characterised by spectroscopic and spectrometric techniques. In addition, theposition of the carboxymethyl substituent in the complexes and its effect on the electrochemical andphotophysical behaviour was evaluated. As expected, the homoleptic copper (I) complexes with theN,N ligands showed air instability. In contrast, the obtained heteroleptic complexes were air- andwater-stable in solid and solution. All complexes displayed green-yellow luminescence in CH2Cl2at room temperature due to ligand-centred (LC) phosphorescence in the case of the Cu(I) complexwith an unsubstituted N,N ligand and metal-to-ligand charge transfer (MLCT) phosphorescence forthe carboxymethyl-substituted complexes. Interestingly, proper substitution of the bis(1H-indazol1-yl)methane ligand enabled the achievement of a remarkable luminescent yield (2.5%) in solution,showcasing the great potential of this novel class of copper(I) complexes for potential applications inluminescent devices and/or photocatalysis.
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    New Aluminum Complexes with an Asymmetric Amidine–Imine Ligand: Synthesis, Characterization, and Application in Catalysis
    Gómez Zamorano, Fernando; Rojas Moraga, María José; Mallet-Ladeira, Sonia; Cabrera, Alan R.; Garo, Jordan; Sotiropoulos, Jean-Marc; Maerten, Eddy; Madec, David; Rojas, René S.
    In this work, a new asymmetric amidine–imine ligand, using 1,8-diaminonaphthalene as a rigid platform, was synthesized and characterized, and its ability to form complexes with aluminum(III) was investigated. Several aluminum complexes were synthesized and characterized in solution and in the solid state. The synthesis of a dihalogenated aluminum(III) complex (AlI2L) using a reducing agent revealed an atypical pathway, which was investigated using Density Functional Theory (DFT). The dimethylated aluminum complex AlMe2L and the dihalogenated aluminum complex AlI2L were evaluated as catalysts for the transformation of CO2 and epoxides into cyclic carbonates in the presence of Bu4NI as a co-catalyst or in a single-component system, respectively. AlMe2L/Bu4NI appeared to be the most efficient system under 1 bar of CO2 at 90 °C.