Five hybrid organic-inorganic mate rials have been prepared with pyrrole and the transition metal substitut ed Keggin structure phosphomolybdate anions(PMo 11ZO￡3￡1￡μ￡- ￡?Z ￡1/2Mn￡?Co￡?Ni￡?Cu￡?Zn￡(c)by che...Five hybrid organic-inorganic mate rials have been prepared with pyrrole and the transition metal substitut ed Keggin structure phosphomolybdate anions(PMo 11ZO￡3￡1￡μ￡- ￡?Z ￡1/2Mn￡?Co￡?Ni￡?Cu￡?Zn￡(c)by chemical polymerization￡(r)The phosphomolybdates are anchored within the polymer matrix and reduced to mixedvalence phosphomolybdate s￡(r)The materials are characterized by e lemental analysis,IR spectra,thermogravimetric analysis,X-ray photoelectron spectroscopy and electron spin reso nance￡(r)Conductivity measurement in dicates that the title materials hav e good conductivity￡(r)展开更多
A new molybdophosphate, (NH3CH2CH2NH3)2Mo5O15(HPO4)2 has been synthesized under hydrothermal conditions and structurally characterized by single crystal X ray diffractions. The compound crystallizes in the monoclinic,...A new molybdophosphate, (NH3CH2CH2NH3)2Mo5O15(HPO4)2 has been synthesized under hydrothermal conditions and structurally characterized by single crystal X ray diffractions. The compound crystallizes in the monoclinic, space group C2/c, a=1.7633(2)nm, b=1.00122(11) nm, c=1.37624(13)nm, β=96.974(5)°, V=2.4117(5)nm3, Z=4, Dc=2.853g·cm-3, μ(MoKα)=2.766mm-1, F(000)=1992. The structure contains the isolated polyanions of [Mo5O15(HPO4)2]4- units around which the portonated ethylenediamine ions are pos itioned. By hydrogen bond interactions the polyanions are interconnected to form a three dimensional network. Other characterizations by powder XRD, IR and thermal analysis are also described. CCDC: 206321.展开更多
The polyoxometalate particles with Keggin structure, (NH 4) 3PMo 12 O 40 ·9H 2O(1) and (NH 4) 3PW 12 O 40 ·7H 2O(2), were prepared firstly by solid state reaction at room temperature. Their structure, partic...The polyoxometalate particles with Keggin structure, (NH 4) 3PMo 12 O 40 ·9H 2O(1) and (NH 4) 3PW 12 O 40 ·7H 2O(2), were prepared firstly by solid state reaction at room temperature. Their structure, particle sizes and appearances were characterized with elemental analyses, IR, XRD and TEM techniques. The size distribution of nanoparticle 1 is in the range of 5—14 nm, the mean size is 9 nm, and the size distribution of nanoparticle 2 is in the range of 3—12 nm, the mean size is 6 nm. It was found that the product H 2C 2O 4·2H 2O plays a critical role in preventing the nanoparticles from aggregating to large particles.展开更多
文摘Five hybrid organic-inorganic mate rials have been prepared with pyrrole and the transition metal substitut ed Keggin structure phosphomolybdate anions(PMo 11ZO￡3￡1￡μ￡- ￡?Z ￡1/2Mn￡?Co￡?Ni￡?Cu￡?Zn￡(c)by chemical polymerization￡(r)The phosphomolybdates are anchored within the polymer matrix and reduced to mixedvalence phosphomolybdate s￡(r)The materials are characterized by e lemental analysis,IR spectra,thermogravimetric analysis,X-ray photoelectron spectroscopy and electron spin reso nance￡(r)Conductivity measurement in dicates that the title materials hav e good conductivity￡(r)
文摘A new molybdophosphate, (NH3CH2CH2NH3)2Mo5O15(HPO4)2 has been synthesized under hydrothermal conditions and structurally characterized by single crystal X ray diffractions. The compound crystallizes in the monoclinic, space group C2/c, a=1.7633(2)nm, b=1.00122(11) nm, c=1.37624(13)nm, β=96.974(5)°, V=2.4117(5)nm3, Z=4, Dc=2.853g·cm-3, μ(MoKα)=2.766mm-1, F(000)=1992. The structure contains the isolated polyanions of [Mo5O15(HPO4)2]4- units around which the portonated ethylenediamine ions are pos itioned. By hydrogen bond interactions the polyanions are interconnected to form a three dimensional network. Other characterizations by powder XRD, IR and thermal analysis are also described. CCDC: 206321.
文摘The polyoxometalate particles with Keggin structure, (NH 4) 3PMo 12 O 40 ·9H 2O(1) and (NH 4) 3PW 12 O 40 ·7H 2O(2), were prepared firstly by solid state reaction at room temperature. Their structure, particle sizes and appearances were characterized with elemental analyses, IR, XRD and TEM techniques. The size distribution of nanoparticle 1 is in the range of 5—14 nm, the mean size is 9 nm, and the size distribution of nanoparticle 2 is in the range of 3—12 nm, the mean size is 6 nm. It was found that the product H 2C 2O 4·2H 2O plays a critical role in preventing the nanoparticles from aggregating to large particles.
