Zhanwei Bu

A 2D Hydrogen-Bonded 1D Coordination Network of Pr(III) with Pyridine-2,6-Dicarboxylic Acid: Hydrothermal Synthesis, Structure, and Luminescent Properties

A coordination polymer {[Pr(PDA)2(H2O)2]·4H2O}n was synthesized through the reaction between pyridine-2,6-dicarboxylic acid (H2PDA) and Pr(NO3)3·6H2O under hydrothermal conditions and characterized by elemental analyses, IR spectroscopy, thermal analyses and single-crystal X-ray diffraction studies. The compound crystallizes in monoclinic system, space group P(2)/c1. Hydrogen bonds exist between adjacent 1D chains to form planes that are further arranged as highly corrugated 2D sheet structure. Luminescence of the complex has been measured in the solution of DMF at room temperature. In addition, the luminescent emissions of the complex showed certain selectivity toward some metal ions.

Antimicrobial activity and density functional calculations of a supramolecular manganese complex

The density functional theory calculations on the manganese complex ([Mn(8-OHQ)3] · CH3OH, 8-OHQ = 8-hydroxyquinoline) is made and its stabilization, molecular orbital composition, orbital energies, and NBO charge distribution have been investigated. The crystal structure of the complex closely resembles the optimized structure. In vitro activities against some antimicrobials (Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Bacillus subtilis) are determined. The antimicrobial activities present a positive correlation between the concentrations and bioactivities of the complex. The relationship between bioactivities and molecular orbitals (HOMO and LUMO orbitals) of the complex is also discussed.

[CoCl(TPPyP)], a novel bifunctional catalyst for the coupling reaction of carbon dioxide and propylene oxide

A novel bifunctional catalyst chloro[meso-tetrakis(1-phenylpyrazol-4-yl)porphyrin] cobalt(III), [CoCl(TPPyP)], has been prepared and used to catalyse the synthesis of propylene carbonate from carbon dioxide and propylene oxide under mild conditions. Propylene carbonate was obtained with a yield of 25.2% at 100 °C in the absence of co-catalyst. A reaction mechanism is proposed.