Yang Xujie

Nanometre-sized TiO2 as applied to the modification of unsaturated polyester resin

Abstract Nano-materials can be used as filler for polymers. Thereby, the mechanical properties of the obtained materials can be obviously improved. In this paper, nanometre-sized TiO2 was used as filler for unsaturated polyester (UP) resin, and the effect of the amount of the filler on the mechanical properties of this material was discussed.

Solution-Phase Synthesis and Characterization of Perovskite LaCoO3 Nanocrystals via A Co-Precipitation Route

Abstract A facile co-precipitation route for the synthesis of well-dispersed LaCoO3 nanocrystals was developed. The asprepared products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectrometer (EDX), and laser Raman spectroscopy (LRS). The results showed that modulating the growth parameters, such as the addition of surfactants as well as the adding manner of the precipitator had a significant effect on the overall shape and size of the obtained nanocrystals. The nanorods with the diameter of 20 nm and spherical LaCoO3 nanocrystals with the size of about 25 nm could be obtained at a relatively low calcining temperature of 600 °C. Furthermore, the Raman properties of LaCoO3 products obtained at different calcining temperatures were investigated.

Synthesis, structure and antimicrobial study of two copper(II) complexes derived from paeonol and R-NH-propyldiamine

Two new copper(II) complexes were synthesized from 2-hydroxyl-4-methoxyacetophone with R-NH–CH2–CH2–CH2–NH2 (for complex 1, R = H; complex 2, R = C6H5–CH2–) in the presence of Cu2+. Crystals of 1 were monoclinic, space group P21/n, with a = 12.6408(10) Å, b = 7.4063(6) Å, c = 16.8863(14) Å and β = 93.3590(10)°, complex 2 crystals were triclinic, space group P with a = 7.561(3) Å, b = 10.680(4) Å, c = 13.868(5) Å and α = 97.389(6)°, β = 95.240(6)°, γ = 101.206(6)°. Both Cu(II) atoms were four-coordinate with distorted square-planar geometry. The toxicity of 1 and 2 were evaluated by testing antimicrobial activity against bacterial strands.

A Study on the Spectra Characterization of Ruthenium(Ii) Complexes

Abstract A series of Ru(II) complexes have been synthesized, and their electronic spectra and NMR spectroscopy properties were characterized. the chemical shifts of aromatic protons of [Ru(bpy)3] (PF6)2, [Ru(phen)3](ClO4)2 and [Ru(bqdi)3](PF6) move downfield, but the resonance peaks of cis-Ru(bpy)2Cl2 shift upfield. Within the visible spectra of the ruthenium(II) complexes appear a relatively high oscillator strength which is referred to as the π(Ru)→* (ligands) transition.

Synthesis, structure and antimicrobial study of two new copper(II) complexes derived from N-(3-aminopropyl) benzylamine ligand (apba) and N-salicylidene-apba

Two new copper(II) complexes were synthesized by reaction of N-(3-aminopropyl)benzylamine (L1: apba, for complex 1) and N-salicylidene-apba (L2: for complex 2) with Cu2+. Crystals of complex 1 were orthorhombic, space group pccn, with a = 15.2149(10), b = 25.0071(16), c = 7.6280(5) Å and α = β = γ = 90°. Complex 2 crystals were monoclinic, space group P21/c, with a = 8.688(6), b = 12.812(9), c = 16.022(11) Å and β = 99.241(10)°. Structures of the two complexes were centro-symmetric and both Cu(II) atoms were four coordinate with a distorted square-planar geometry. The toxicity of the complexes was evaluated by testing antimicrobial activity against bacterial strands.