Minhua Cao

A controllable synthetic route to Cu, Cu2O, and CuO nanotubes and nanorods

Reducing Cu(OH)4(2-) with hydrazine hydrate and glucose in the presence of a structure-directing surfactant at room temperature gave Cu and Cu2O nanotubes/nanorods, respectively, whereas facile hydrothermal treatment of Cu(OH)4(2-) precursor resulted in CuO nanotubes/nanorods.

Controlled synthesis of LaPO4 and CePO4 nanorods/nanowires

LaPO(4) and CePO(4) nanorods/nanowires with controlled aspect ratios have been successfully synthesized using a hydrothermal microemulsion method under mild conditions. It has been shown that the obtained LaPO(4) has a monoclinic structure, while CePO(4) exists in the hexagonal structure. Uniform nanorods/nanowires with diameters of 20-60xa0nm and lengths ranging from several hundreds of nanometres to several micrometres were obtained. The aspect ratios of the obtained 1D nanostructures can be fine-tuned by simply changing the [H(2)O ]/[surfactant] molar ratios. The possible growth mechanism of LaPO(4) and CePO(4) nanorods/nanowires was explored in detail.

Hydrothermal syntheses and crystal structures of bimetallic cluster complexes [{Cd(phen)2}2V4O12].5H2O and [Ni(phen)3]2[V4O12].17.5H2O

Abstract The hydrothermal reactions of vanadium oxide starting materials with divalent transition metal cations in the presence of nitrogen donor chelating ligands yield the bimetallic cluster complexes with the formulae [{Cd(phen2)2V4O12]·5H2O (1) and [Ni(phen)3]2[V4O12]·17.5H2O (2). Crystal data: C48H52Cd2N8O22V4 (1), triclinic. P 1 , a =10.3366(10), b =11.320(3), c =13.268(3)xa0A, α =103.888(17)°, β =92.256(15)°, γ =107.444(14)°, Z =1; C72H131N12Ni2O29.5V4 (2), triclinic. P 1 , a =12.305(3), b =13.172(6), c =15.133(4), α =79.05(3)°, β =76.09(2)°, γ =74.66(3)°, Z =1. Data were collected on a Siemens P4 four-circle diffractometer at 293xa0K in the range 1.59° θ θ

The synthesis and crystal structure of vanadium complexes: [VIVO2(phen)2]·6H2O and [2,2′-(bipy)2VVO2](H2BO3)·3H2O

Abstract The organic–inorganic hybrid materials vanadium oxide [VIVO2(phen)2]·6H2O (1) and [(2,2′-bipy)2VVO2](H2BO3)·3H2O (2) have been conventional and hydrothermal synthesized and characterized by single crystal X-ray diffraction, elemental analyses, respectively. Although the method and the ligand had been used in the syntheses of the compounds (1) and (2) are different, they almost possess similar structure. They all exhibit the distorted octahedral [VO2N4] unit with organonitrogen donors of the phen and 2,2′-bipy ligands, respectively, which coordinated directly to the vanadium oxide framework. And they are both non-mixed-valence complexes. But the compound (1) is isolated, and the compound (2) consists of a cation of [(2,2′-bipy)2VVO2]+ and an anion of (H2BO3)−. So the valence of vanadium of (1) and (2) are tetravalence and pentavalence, respectively. Meanwhile it is noteworthy that π–π stacking interaction between adjacent phen and 2,2′-bipy groups in compounds 1 and 2 also play a significant role in stabilization of the structure. Thus, the structure of [VIVO2(phen)2]·6H2O and [(2,2′-bipy)2VVO2](H2BO3)·3H2O are both further extended into interesting three-dimensional supramolecular. Crystal data: (1) Triclinic, P 1 , a=8.481(4), b=12.097(5), and c=14.607(6) A , α=66.32(2), β=82.97(3), and γ=82.59(4)°, V=1357.0(10) A 3 , Z=2, R1=0.0685, wR2=0.1522. (2) Triclinic, P 1 , a=6.643(13), b=11.794(2), and c=14.822(3) A , α=101.39(3), β=101.59(3), and γ=97.15(3)°, V=1098.8(4) A 3 , Z=2, R1=0.0736, wR2=0.1998.

Controlled synthesis of LaPO(4) and CePO(4) nanorods/nanowires.

LaPO(4) and CePO(4) nanorods/nanowires with controlled aspect ratios have been successfully synthesized using a hydrothermal microemulsion method under mild conditions. It has been shown that the obtained LaPO(4) has a monoclinic structure, while CePO(4) exists in the hexagonal structure. Uniform nanorods/nanowires with diameters of 20-60xa0nm and lengths ranging from several hundreds of nanometres to several micrometres were obtained. The aspect ratios of the obtained 1D nanostructures can be fine-tuned by simply changing the [H(2)O ]/[surfactant] molar ratios. The possible growth mechanism of LaPO(4) and CePO(4) nanorods/nanowires was explored in detail.