Search

A metal-organic framework (MOF) based on (bpy)Re(CO)3Cl-containing elongated dicarboxylate ligands and Zr6(µ3-O)4(µ3-OH)4 clusters was synthesized and used as an effective single-site catalyst to photochemically reduce carbon dioxide to carbon monoxide and formate and to provide mechanistic insights into the photocatalytic CO2 reduction process. [ABSTRACT FROM AUTHOR]

Two microporous complexes, [Zn(TATAB)(OCH3)] ⋅2 H3O+ ( 1; TATAB=4,4′,4′′-[(1,3,5-triazine-2,4,6-triyl)tris(azanediyl)]tribenzoic acid), [Cu1.5(μ2-O)TATAB*] ( 2; TATAB*=4,4′-{[6-(dimethylamino)-1,3,5-triazine-2,4-diyl]bis(azanediyl)}dibenzoic acid) have been synthesized and characterized by elemental analysis, IR spectroscopy, UV absorption spectroscopy, and thermogravimetric analysis, and by powder XRD and single-crystal XRD analysis. Structural analyses revealed that complex 1 possesses a 3D porous framework with uncoordinated water molecules trapped in the pores; the dimensions of the channels are approximately 29.2×12.3 Å2. Complex 2 has a 3D microporous network structure. In addition, the surface photovoltage and photocatalytic activities were also studied. The photocatalytic properties of the two complexes were investigated by the decomposition of methylene blue under UV and visible-light irradiation. The results revealed that 2 possessea a higher photocatalytic activity than 1 under UV or visible-light irradiation. The potential semiconductor and dye degradation properties of complexes 1 and 2 may be widely applied in the fields of chemical semiconductors and environmental protection in the future. [ABSTRACT FROM AUTHOR]

A series of 4f-5f heteronuclear metallic complexes were synthesized by a hydrothermal route from mixtures of uranyl acetate, lanthanide nitrate, and 1,2,4,5-benzenetetracarboxylic acid (H4BTA) in an aqueous system. Single-crystal X-ray analysis revealed that the thirteen UO2-Ln-BTA complexes ([(UO2)1.5Ln(C10O8H2)1.5(H2O) x]⋅ y H2O; Ln=La ( 1), Ce ( 2), Pr ( 3), Nd ( 4), Sm ( 5), Eu ( 6), Gd ( 7), Tb ( 8), Dy ( 9), Ho ( 10), Er ( 11), Tm ( 12), Yb ( 13); x=6 for 1- 4, x=5 for 5- 13; y=0 for 4, y=1 for 3, y=2 for 2, y=3 for 5, 9, 10, 12, 13, y=4 for 1, 6, 7, 8, 11) are isomorphous with three-dimensional structures. For the purpose of developing potential applications of the UO2-Ln-BTA complexes, we investigated their surface photovoltage and photocatalytic properties. In addition, the thermogravimetric analysis and photoluminescent properties of these complexes were also studied in detail. [ABSTRACT FROM AUTHOR]