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Movilla F, Rey JM, Saleta ME, Gonzaléz-Carvajal M, Spodine E, Cancino P, Di Salvo F. Phenylalanine-Based Co 2+ and Cd 2+ 1D Coordination Polymers: Structural Properties and Catalytic Application for Solvent-Free Aerobic Oxidation of Cycloalkene. Inorg Chem 2023; 62:17136-17149. [PMID: 37824401 DOI: 10.1021/acs.inorgchem.3c02053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Two 1D coordination polymers (CPs) with general formula [M(L)(H2O)(AcO)]n, (M = Co (1) or Cd (2), AcO = acetate anion and L denotes l-phenylalanine based ligand), were synthesized and fully characterized by various spectroscopies (UV-vis, FTIR, and NMR), thermal techniques, magnetic measurements (for 1), and single-crystal and powder X-ray diffraction studies. They can be described as "ribbon-like" 1D polymers constructed through a zigzag arrangement. The polymeric structure is developed due to the coordination mode adopted by the amino acid ligand, classified as μ3-N1O1:O1:O2, which simultaneously links three metal centers. This moiety also plays an important role as a magnetic coupler between metal centers in the cobalt system, which shows a weak antiferromagnetic interaction. Both CPs have also been used in the catalytic oxidation of cyclohexene with molecular oxygen (O2) as an oxidant. Under mild conditions, both compounds demonstrated remarkable catalytic activity, with the cobalt system being more efficient than the cadmium analogue (conversion: 73 and 58% and selectivity for the major product, 2-cyclohexanone: 63 and 55%, for 1 and 2, respectively). Leaching experiments and the results obtained using a radical quencher are consistent with a radical-mediated mechanism for the Co compound. The presence of the superoxide radical was also confirmed using EPR spectroscopy and DMPO as a spin trap, which was further validated by DFT calculations. The activity observed for the Cd analogue is attributed to the organic scaffold assisted by the templating effect of the metal ion.
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Affiliation(s)
- Federico Movilla
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes, 2160, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
- CONICET - Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
| | - Juan M Rey
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes, 2160, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
- CONICET - Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
| | - Martín E Saleta
- Instituto de Nanociencia y Nanotecnología (INN), CNEA-CONICET, Centro Atómico Bariloche, R8402AGP, S.C. de Bariloche, Río Negro 8400, Argentina
- Instituto Balseiro, U.N. Cuyo and CNEA, R8402AGP, S.C. de Bariloche, Río Negro 8400, Argentina
| | - Marco Gonzaléz-Carvajal
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8380492, Chile
| | - Evgenia Spodine
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8380492, Chile
| | - Patricio Cancino
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8380492, Chile
| | - Florencia Di Salvo
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes, 2160, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
- CONICET - Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Piso 3, Ciudad Universitaria, C1428EGA Buenos Aires, Argentina
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Ying SM, Ru JJ, Luo WK. Hydrothermal synthesis, crystal structure and photoluminescence of two homochiral zinc(II) coordination polymers. Acta Crystallogr C Struct Chem 2015; 71:618-22. [PMID: 26146402 DOI: 10.1107/s2053229615012115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 06/24/2015] [Indexed: 11/10/2022] Open
Abstract
Metal-organic frameworks (MOFs) have potentially useful applications and an intriguing variety of architectures and topologies. Two homochiral coordination polymers have been synthesized by the hydrothermal method, namely poly[(μ-N-benzyl-L-phenylalaninato-κ(4)O,O':O,N)(μ-formato-κ(2)O:O')zinc(II)], [Zn(C16H16NO2)(HCOO)]n, (1), and poly[(μ-N-benzyl-L-leucinato-κ(4)O,O':O,N)(μ-formato-κ(2)O:O')zinc(II)], [Zn(C13H18NO2)(HCOO)]n, (2), and studied by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy and fluorescence spectroscopy. Compounds (1) and (2) each have a two-dimensional layer structure, with the benzyl or isobutyl groups of the ligands directed towards the interlayer interface. Photoluminescence investigations show that both (1) and (2) display a strong emission in the blue region.
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Affiliation(s)
- Shao-Ming Ying
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, People's Republic of China
| | - Jing-Jing Ru
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, People's Republic of China
| | - Wu-Kui Luo
- Department of Chemistry, Fujian Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University, Ningde 352100, People's Republic of China
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