resumo
A new quinoline carboxylate-based cobalt (II) metal compound, [Co (HL1)(2)(H2O)(4)] (1) (H(2)L1 = 2-hydroxyquinoline-4-carboxylic acid) has been hydrothermally synthesized, and fully characterized by single-crystal X-ray diffraction, powder X-ray diffraction, Fourier-transform infrared (FT-IR), elemental and thermo-gravimetric analysis. Compound 1 shows high thermal stability up to similar to 300 degrees C. Single-crystal X-ray diffraction study of 1 exhibited monomeric structure experiences further stabilized in solid state through different non-covalent interaction, for example, H-bonding and pi center dot center dot center dot pi stacking interaction and extended to 3D supramolecular H-bonded network. Compound 1 efficiently catalyzes epoxidation reactions of olefins under homogeneous conditions using molecular oxygen as an oxidizer. Another reported quinoline carboxylate-based nickel (II) monomer [Ni(L-2)(2)(H2O)(2)] (2) (HL2 = thiazole-4-carboxylic acid) has been synthesized and characterized to compare it with compound 1 towards aerobic epoxidation reactions, where 1 comes as superior.
palavras-chave
MOLECULAR-OXYGEN; COORDINATION POLYMER; FRAMEWORK SYNTHESIS; CRYSTAL-STRUCTURE; OXIDATION; COMPLEXES; CHEMISTRY; ALKENES; ZN(II); EFFICIENCY
categoria
Chemistry
autores
Patra, BN; Ghosh, P; Sepay, N; Gayen, S; Koner, S; Brandao, P; Lin, Z; Debnath, R; Pratihar, JL; Maity, T; Mal, D
nossos autores
Paula Cristina Ferreira da Silva Brandão
Investigador Auxiliar
Zhi Lin
Investigador Principalagradecimentos
CICECO-Aveiro Institute of Materials, Grant/Award Number: UIDB/50011/2020 & UIDP/50011/2020; Department of Science and Technology, Government of West Bengal, Grant/Award Number: 28(sanc)-ST/P/S&T/15G4/2018; Foundation for Science and Technology; Department of Science & Technology and Biotechnology, Government of West Bengal