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SYNTHESIS, CHARACTERIZATION AND CATALYTIC ACTIVITY OF N,N'-BIS(3-ALLYL SALICYLIDENE)ETHYLENEDIAMINE COBALT(Ⅱ) SCHIFF BASE COMPLEX ANCHORED ON A NEW polymer support

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Chinese Journal of polymer Science 2004年第1期22卷 31-42页

作者： K.C. Gupta H.K. Abdulkadir S. Chand polymer Research Laboratory Department of Chemistry Indian Institute of Technology Roorkee-247667 IndiaPolymer Research Laboratory Department of Chemistry Indian Institute of Technology Roorkee-247667 IndiaPolymer Research Laboratory Department of Chemistry Indian Institute of Technology Roorkee-247667 India

A new chelating polymer support has been prepared by suspension copolymerization of synthesized N,N'-bis(3- allyl salicylidene)ethylenediamine monomer Schiff base (N,N'-BSEDA) with styrene (St) and divinylbenzene (DVB) using azobisisobutyronitrile (AIBN) as initiator in the presence of poly(vinyl alcohol). The content and complexation ability of monomer Schiff base (N,N'-BSEDA) for cobalt ions in prepared crosslinked polymer beads have shown dependence on the amount of DVB used in reaction mixture. The amount of monomer Schiff base (N,N '-BSEDA) in crosslinked beads showed a substantial decreasing trend at high concentration of DVB in the reaction mixture (> 1.5 mol dm-3), hence the efficiency of complexation (EC%) and cobalt ion loading (EL%) of polymer beads showed a decreasing trend. The structure of monomer Schiff base (N,N'-BSEDA) and its cobalt complex on polymer support was elucidated by IR, UV and magnetic measurements. The catalytic activity of polymer bound cobalt Schiff base complex was evaluated by analyzing kinetic data of decomposition of hydrogen peroxide in the presence of either supported cobalt complex or free cobalt complex. The activation energy for the decomposition of hydrogen peroxide by polymer supported cobalt complex was found to be low (33.37 kJ mol-1) in comparison with unsupported cobalt complex (56.35 kJ mol-1). On the basis of experimental observations, reaction steps are proposed and a suitable rate expression derived.

关键词： Cobalt complex polymer support Hydrogen peroxide Catalysis

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PROPERTIES OF polymer supportED Ni-Cu BIMETALLIC CATALYSTS PREPARED BY SOLVATED METAL ATOM IMPREGNATION

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Chinese Journal of polymer Science 1996年第3期14卷 217-224页

作者：吴世华朱常英黄文强 Department of Chemistry Nankai University State Key Laboratory of Functional polymer Materials for Adsorption and Separation Nankai University Tianjin 300071

D-72 resin supported nickel-copper catalysts prepared by solvated metal atom impregnation (SMAI) were studied by magnetic measurements and X-ray photoelectron spectroscopy (XPS). The Ni particles on the catalysts are very highly dispersed and display superparamagnetic behaviour. Ni-Cu alloy clusters were found to be formed. The surface compositions are different from the bulk concentrations. In contrast with the surface enrichment in copper generally observed on conventional Ni-Cu catalysts, the surfaces of these catalysts are enriched in nickel. The nickel is in both zero and valent states, while copper is mainly in metallic state. Catalytic data show that the formation of Ni-Cu alloy clusters has a profound effect on the catalytic activities of the catalysts in the hydrogenation of furfural. The activity of the Ni:Cu ratio of one bimetallic catalysts is much higher than that of the Ni or Cu monometallic catalyst.

关键词： polymer support Ni-Cu catalyst solvated metal atom impregnation

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STRUCTURAL CHARACTERIZATION OF Pd-SnO2/D3520 CATALYSTS

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Chinese Journal of Reactive polymers 1996年第Z1期 64-70页

作者： Hu Weibing(Hubei institute for Nationalities, Enshi, 445000)Zhou Zhongxin Zhang Manzheng(Hubei Provincial Institute of Chemistry, Wuchang, 430074 )

ＳＴＲＵＣＴＵＲＡＬＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＰｄ－ＳｎＯ２／Ｄ３５２０ＣＡＴＡＬＹＳＴＳＨｕＷｅｉｂｉｎｇ（ＨｕｂｅｉｉｎｓｔｉｔｕｔｅｆｏｒＮａｔｉｏｎａｌｉｔｉｅｓ，Ｅｎｓｈｉ，４４５０００）Ｚｈｏｕ... 详细信息

ＳＴＲＵＣＴＵＲＡＬＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＰｄ－ＳｎＯ２／Ｄ３５２０ＣＡＴＡＬＹＳＴＳＨｕＷｅｉｂｉｎｇ（ＨｕｂｅｉｉｎｓｔｉｔｕｔｅｆｏｒＮａｔｉｏｎａｌｉｔｉｅｓ，Ｅｎｓｈｉ，４４５０００）ＺｈｏｕＺｈｏｎｇｘｉｎ；Ｚｈａｎｇ...

关键词： polymer support Bimetallic catalysts Structural characterization

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STRUCTURAL CHARACTERIZATION OF Pd-SnO2/D3520 CATALYSTS

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Chinese Journal of Reactive polymers 1995年第Z1期 107-112页

作者： Hu Weibing(Hubei Institute for Nationalities, Enshi, 445000)Zhou Zhongxin Zhang Manzheng (Hubei Provincial institute of Chemistry, Wuchang, 430074)

ＳＴＲＵＣＴＵＲＡＬＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＰｄ－ＳｎＯ２／Ｄ３５２０　ＣＡＴＡＬＹＳＴＳＨｕＷｅｉｂｉｎｇ（ＨｕｂｅｉＩｎｓｔｉｔｕｔｅｆｏｒＮａｔｉｏｎａｌｉｔｉｅｓ，Ｅｎｓｈｉ，４４５０００）Ｚｈｏ... 详细信息

ＳＴＲＵＣＴＵＲＡＬＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＰｄ－ＳｎＯ２／Ｄ３５２０　ＣＡＴＡＬＹＳＴＳＨｕＷｅｉｂｉｎｇ（ＨｕｂｅｉＩｎｓｔｉｔｕｔｅｆｏｒＮａｔｉｏｎａｌｉｔｉｅｓ，Ｅｎｓｈｉ，４４５０００）ＺｈｏｕＺｈｏｎｇｘｉｎ；ＺｈａｎｇＭ?..

关键词： polymer support Bimetallic catalysts Structural characterization

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STRUCTURAL CHARACTERIZATION OF Pd-SnO_2/D_(3520) CATALYSTS

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Chinese Journal of Reactive polymers 1996年第1期5卷 64-70页

作者： Hu Weibing Zhou Zhongxin Zhang Manzheng Hubei Institute for Nationalities Enshi445000 Hubei Provincial Institute of Chemistry Wuchang430074)

Distribution of metals on Pd - SnO_2/D_(3520) catalysts and state of the catalysts were studied with SEM, XRD. The interaction between metals and support or between Pd and Sn or Ph were studied by IR, XPS. In addition, the relationship of the activity for catalytic hydrogenation of the olefins and outer layer valence electron density Of Pd was discussed. The results showed that these catalysts had suitable surface state, the metals were uniformly dispersed on the surface layer of the support. There were not obvious lute7uction between the metals and the support. There was strong interaction between Pd and Sn (or Pb) in the catalysts. The catalytic activity for hydrogenation was related to outer layer silence electron density of Pd.

关键词： polymer support Bimetallic catalysts Structural characterization

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STRUCTURAL CHARACTERIZATION OF Pd-SnO_2/D3520 CATALYSTS

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Chinese Journal of Reactive polymers 1995年第1期4卷 107-112页

作者： Hu Weibing Zhou Zhongxin Zhang Manzheng Hubei Institute for Nationalities Enshi 445000 Hubei Provincial institute of Chemistry Wuchang 430074

Distribution of metals on Pd-SnO2/D3520 catalysts and state of the catalystswere studied with SEM, XRD. The interactlbn between metals and supped or between Pd and Sn or Ph were studied by IR, XPS. In addition, the relationship ofthe activity for catalytic hydrogenation of the olefins and outer layer valence electrondensity of Pd was discussed. The results showed that these catalysts had suitablesurface state, the metals were uniformly dispersed on the surface layer of the suppnd. There were not obvious interaction between the metals and the supal. Therewas strong interaction between Pd and Sn (or Ph) in the catalysts. The catalytic activity for hydrogenation was related to outer layer valence electron density of Pd.

关键词： polymer support Bimetallic catalysts Structural characterization

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