Parent compounds of cyclopentadienyltitanium substituted heteropolytungstates with Keggin structure,An[(CpTi)XW11O39]·xH2O(A=Me4N,K;X=P,Si,Co;Cp=η5-C5H5) were synthesized in aqueous phase.By allowing parent hete...Parent compounds of cyclopentadienyltitanium substituted heteropolytungstates with Keggin structure,An[(CpTi)XW11O39]·xH2O(A=Me4N,K;X=P,Si,Co;Cp=η5-C5H5) were synthesized in aqueous phase.By allowing parent heteropoly compounds to react with protonated 8-quinolinol,the title supermolecular compounds(C9H8NO)mAn[(CpTi)XW11O39]·xH2O(A=Me4N,H;X=P,Si,Co) were synthesized.The title compounds were characterized by means of elementary analysis,IR,UV,1H NMR,XRD and TG-DSC.The results indicate that the title compounds are new heteropoly compounds,and there is a charge transfer interaction between the organic cation and heteropoly anion.The results obtained from thermal analysis show that QCpTiPW,QCpTiSiW and QCpTiCoW begin to decompose at 212.4,194.2 and 171.2 ℃,respectively.The results obtained from antibacterial test reveal that QCpTiSiW has the best antibacterial activity,and the MIC values of QCpTiSiW against Escherichia coli and Staphylococcus aurous are 64.0 and 0.500 μg·mL-1,respectively.展开更多
The title compound was synthesised and the X-ray diffraction analysis shows that the crystal belongs to in monoclinic system, space group P21/n with α=16. 972(4) A ,b=14. 128(3)A , c = 22. 615(4)A ,β=103.16(2)°...The title compound was synthesised and the X-ray diffraction analysis shows that the crystal belongs to in monoclinic system, space group P21/n with α=16. 972(4) A ,b=14. 128(3)A , c = 22. 615(4)A ,β=103.16(2)°,V=528.14A3,F(000) = 2264, Z=4. Both cation [YQ(HQ)2]2+ and anion [NiQ3]- are of distorded octahedral geometry with coordination number of 6. Its IR spectrum was recorded.展开更多
The mono-nuclear complex [Cdq3][Cd（qH）3]（ClO4）CH3OH has been synthesized by 8-quinolinol and hydrated cadmium perchlorate in methanol solution. The crystal belongs to triclinic, space group P/ with a = 11.1449（15...The mono-nuclear complex [Cdq3][Cd（qH）3]（ClO4）CH3OH has been synthesized by 8-quinolinol and hydrated cadmium perchlorate in methanol solution. The crystal belongs to triclinic, space group P/ with a = 11.1449（15）, b = 13.3334（18）, c = 17.654（2）A°,α = 85.555（2）, β= 88.497（2）, γ= 75.681（2）°, V = 2534.1（6） A°^3, Z = 1, C110H86Cd4Cl2 N12O22, Mr = 2448.41, Dc =1.604 g/cm^3, F（000） = 1232 and μ = 0.961 mm^-1. The structure was refined to R = 0.0387 and wR =0.0973 for 7775 observed reflections （1 〉 2σ（I））. In this crystal there exist two independent mononuclear complexes of [Cdq3]^- and [Cd（qH）3]^2＋. Each cell contains two [Cdq3]^- anions, two [Cd（qH）3]^2＋ cations, two ClO4^- anions and two methanol molecules.展开更多
A monocyclopentadienyl titanium complex containing 8-quinolinolato (QCpTiCl_2) was synthesized. Its activities in ethylene polymerization at various Al/Ti molar ratios, different temperatures and activation time were ...A monocyclopentadienyl titanium complex containing 8-quinolinolato (QCpTiCl_2) was synthesized. Its activities in ethylene polymerization at various Al/Ti molar ratios, different temperatures and activation time were investigated. The activity with a Al/Ti molar ratio of 500 exhibited a maximum of 2.8×10~5 g/(mol.h) at 30℃. The activation time of QCpTiCl_2 with MAO before polymerization also plays a role on the activity. The structural properties of the produced polyethylene (molecular weight, molecular weight distribution and melting point) were discussed. Kinetic behaviors of ethylene polymerization with the QCpTiCl_2/MAO system at different Al/Ti molar ratios were studied. For the QCpTiMeCl/MAO system and the CpTiMe_2Cl/MAO system, binding energies of the examined intermediates were calculated by quantum-mechanical method based on ADF program, respectively. It is confirmed that the chlorinebridged adduct formed by the reaction of QCpTiMeCl with MAO is thermodynamically steady. In the case of the QCpTiMeCl/MAO system, olefin-separated ion pair (OSIP) mechanism is much favorable than ion-pair dissociation (IPD) mechanism. The experimental result on the CpTiMe_2Cl/MAO system showed lower activity for ethylene polymerization than that on the QCpTiMeCl/MAO system, which revealed that the CpTiMe_2Cl/MAO system is unfavorable to form active species with ethylene.展开更多
Under near ambient temperature and ultrasonication, nanocrystalline Zn(Oxin)2·2H2O (zinc 8-quinolinolate) was synthesized by solid state chemical reaction. The particle size distribution was relatively uniform, t...Under near ambient temperature and ultrasonication, nanocrystalline Zn(Oxin)2·2H2O (zinc 8-quinolinolate) was synthesized by solid state chemical reaction. The particle size distribution was relatively uniform, the morphology of the mare was ball like particle. The phase, particle size and morphology of the prepared nanocrystalline were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron diffraction (ED). The results show that the crystallite product has an average size of about 30 nm. The effects of a series of reaction conditions on the synthesis of Zn(Oxin)2·2H2O by solid state reaction were studied. During the synthesis of nanocrystalline Zn(Oxin)2·2H2O, the solid state reaction conditions such as changing reactant, matching proportion of reactant, adding inert substance, joining a little solvent or surface active solvent and grinding at different times may influence morphology, particle size and the size distribution of final products.展开更多
Bis(8-quinolinolato)zirconium dichloride (Ox)2ZrCl2 (Ox- = 8-quinolinolato) was found active for ethylene oligomerization with a high selectivity of 84~94% to C4~C10 olefins at 70~100C under the pressure of 1.8 MPa us...Bis(8-quinolinolato)zirconium dichloride (Ox)2ZrCl2 (Ox- = 8-quinolinolato) was found active for ethylene oligomerization with a high selectivity of 84~94% to C4~C10 olefins at 70~100C under the pressure of 1.8 MPa using Et2AlCl as a co-catalyst (Al/Zr = 60).展开更多
基金supported by the chemical materials institute China academy of engineering physics,the doctoral innovation research assistance program of science and technology review
文摘Parent compounds of cyclopentadienyltitanium substituted heteropolytungstates with Keggin structure,An[(CpTi)XW11O39]·xH2O(A=Me4N,K;X=P,Si,Co;Cp=η5-C5H5) were synthesized in aqueous phase.By allowing parent heteropoly compounds to react with protonated 8-quinolinol,the title supermolecular compounds(C9H8NO)mAn[(CpTi)XW11O39]·xH2O(A=Me4N,H;X=P,Si,Co) were synthesized.The title compounds were characterized by means of elementary analysis,IR,UV,1H NMR,XRD and TG-DSC.The results indicate that the title compounds are new heteropoly compounds,and there is a charge transfer interaction between the organic cation and heteropoly anion.The results obtained from thermal analysis show that QCpTiPW,QCpTiSiW and QCpTiCoW begin to decompose at 212.4,194.2 and 171.2 ℃,respectively.The results obtained from antibacterial test reveal that QCpTiSiW has the best antibacterial activity,and the MIC values of QCpTiSiW against Escherichia coli and Staphylococcus aurous are 64.0 and 0.500 μg·mL-1,respectively.
文摘The title compound was synthesised and the X-ray diffraction analysis shows that the crystal belongs to in monoclinic system, space group P21/n with α=16. 972(4) A ,b=14. 128(3)A , c = 22. 615(4)A ,β=103.16(2)°,V=528.14A3,F(000) = 2264, Z=4. Both cation [YQ(HQ)2]2+ and anion [NiQ3]- are of distorded octahedral geometry with coordination number of 6. Its IR spectrum was recorded.
基金This work was supported by the National Natural Science Foundation of China (No. 20271043) and Natural Science Foundation of Shandong Province (No. Y2002B10)
文摘The mono-nuclear complex [Cdq3][Cd（qH）3]（ClO4）CH3OH has been synthesized by 8-quinolinol and hydrated cadmium perchlorate in methanol solution. The crystal belongs to triclinic, space group P/ with a = 11.1449（15）, b = 13.3334（18）, c = 17.654（2）A°,α = 85.555（2）, β= 88.497（2）, γ= 75.681（2）°, V = 2534.1（6） A°^3, Z = 1, C110H86Cd4Cl2 N12O22, Mr = 2448.41, Dc =1.604 g/cm^3, F（000） = 1232 and μ = 0.961 mm^-1. The structure was refined to R = 0.0387 and wR =0.0973 for 7775 observed reflections （1 〉 2σ（I））. In this crystal there exist two independent mononuclear complexes of [Cdq3]^- and [Cd（qH）3]^2＋. Each cell contains two [Cdq3]^- anions, two [Cd（qH）3]^2＋ cations, two ClO4^- anions and two methanol molecules.
基金The work is sub sidized by Special Funds for Major State Basis Research Projects of China(No.G1999064801)
文摘A monocyclopentadienyl titanium complex containing 8-quinolinolato (QCpTiCl_2) was synthesized. Its activities in ethylene polymerization at various Al/Ti molar ratios, different temperatures and activation time were investigated. The activity with a Al/Ti molar ratio of 500 exhibited a maximum of 2.8×10~5 g/(mol.h) at 30℃. The activation time of QCpTiCl_2 with MAO before polymerization also plays a role on the activity. The structural properties of the produced polyethylene (molecular weight, molecular weight distribution and melting point) were discussed. Kinetic behaviors of ethylene polymerization with the QCpTiCl_2/MAO system at different Al/Ti molar ratios were studied. For the QCpTiMeCl/MAO system and the CpTiMe_2Cl/MAO system, binding energies of the examined intermediates were calculated by quantum-mechanical method based on ADF program, respectively. It is confirmed that the chlorinebridged adduct formed by the reaction of QCpTiMeCl with MAO is thermodynamically steady. In the case of the QCpTiMeCl/MAO system, olefin-separated ion pair (OSIP) mechanism is much favorable than ion-pair dissociation (IPD) mechanism. The experimental result on the CpTiMe_2Cl/MAO system showed lower activity for ethylene polymerization than that on the QCpTiMeCl/MAO system, which revealed that the CpTiMe_2Cl/MAO system is unfavorable to form active species with ethylene.
基金Project (29631040) supported by the National Natural Science Foundation of China Project (200604) supported by the Scientific Research Foundation of Neijiang Teachers College, China
文摘Under near ambient temperature and ultrasonication, nanocrystalline Zn(Oxin)2·2H2O (zinc 8-quinolinolate) was synthesized by solid state chemical reaction. The particle size distribution was relatively uniform, the morphology of the mare was ball like particle. The phase, particle size and morphology of the prepared nanocrystalline were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron diffraction (ED). The results show that the crystallite product has an average size of about 30 nm. The effects of a series of reaction conditions on the synthesis of Zn(Oxin)2·2H2O by solid state reaction were studied. During the synthesis of nanocrystalline Zn(Oxin)2·2H2O, the solid state reaction conditions such as changing reactant, matching proportion of reactant, adding inert substance, joining a little solvent or surface active solvent and grinding at different times may influence morphology, particle size and the size distribution of final products.
基金We are gratefully acknowledge the National Natural Science Foundation of China(Grant no.20173006)for financial support of this research
文摘Bis(8-quinolinolato)zirconium dichloride (Ox)2ZrCl2 (Ox- = 8-quinolinolato) was found active for ethylene oligomerization with a high selectivity of 84~94% to C4~C10 olefins at 70~100C under the pressure of 1.8 MPa using Et2AlCl as a co-catalyst (Al/Zr = 60).
