Catalytic Behavior Of An Alumina-Metal Acetate Nanohydrid

Abstract The surface of alumina nanoparticles, prepared by the sol-gel method, was chemically modified through a zinc acetate complex, to produce a nanohybrid material. Succinic acid was used as a coupling agent between the zinc acetate and the alumina particles, providing a significant increase in the mobility of the zinc complex. Bidentate bridging and unidentate bonding modes were identified between the succinic acid and the OH groups of the alumina sol, whereas the zinc acetate reacts with the modified alumina (i.e. with the unreacted OH of the succinic acid) via unidentate bonding. Evidence of direct interaction between the OH groups of alumina sol and the zinc acetate complex was also observed. The samples were characterized by SBET, XRD, FT-IR and thermal analysis. The increment in the mobility of the zinc complex and in its chemical activity was indirectly determined through the catalytic activity of the complex in the esterification reaction of dimethyl terephthalate (DMT) with ethylene glycol (EG).

[1]  R. Palomino-Merino.  Photoluminescence of TiO2: Eu3+ thin films obtained by sol-gel on Si and Corning glass substrates , 2001 .

[2]  J. Saniger,et al.  Simulation of the infrared spectra of transition aluminas from direct measurement of Al coordination and molecular dynamics , 2001 .

[3]  R. Frost,et al.  Thermal transformation of alumina hydrolysates and gels synthesized from secbutoxyaluminium(III) modified with short-chain aliphatic acids dissolved in butyl ether , 2001 .

[4]  P. Brown,et al.  Biodegradable hydroxyapatite - Polymer composites , 2001 .

[5]  T. Sastry,et al.  Preparation and characterization of a new bioinorganic composite: collagen and hydroxyapatite , 2000, Biotechnology and applied biochemistry.

[6]  R. Frost,et al.  Dehydration and dehydroxylation of alumina gels prepared from tri-sec-butoxyaluminium modified with short chain aliphatic acids , 2000 .

[7]  H. Mayer,et al.  Supported organometallic complexes. Part XX. Hydroformylation of olefins with rhodium(I) hybrid catalysts , 2000 .

[8]  J. Tanaka,et al.  Apatite formation on organic monolayers in simulated body environment. , 2000, Journal of biomedical materials research.

[9]  J. Flores-Estrada,et al.  Effect of Different Catalysts on the Synthesis of Bis(2-Hydroxyethyl) Terephthalate , 2000 .

[10]  A. Tomsia,et al.  Optical properties of sol–gel deposited Al2O3 films , 1999 .

[11]  S. El-Hakam.  Structure, texture and catalytic activity of ZnO/Al2O3 catalysts , 1999 .

[12]  S. Musić,et al.  Hydrothermal crystallization of boehmite from freshly precipitated aluminium hydroxide , 1999 .

[13]  Q. Fu,et al.  Preparation of alumina films from a new sol-gel route , 1999 .

[14]  Linshu Liu,et al.  An osteoconductive collagen/hyaluronate matrix for bone regeneration. , 1999, Biomaterials.

[15]  H. M. Kim,et al.  Bonelike apatite coating on organic polymers: novel nucleation process using sodium silicate solution. , 1999, Biomaterials.

[16]  M. Suvanto,et al.  Deposition of tungsten hexacarbonyl on alumina : a diffuse reflectance infrared Fourier transform spectroscopy study , 1999 .

[17]  A. Wan,et al.  Preparation of a chitin-apatite composite by in situ precipitation onto porous chitin scaffolds. , 1998, Journal of biomedical materials research.

[18]  E. I. Ko,et al.  A homogeneously dispersed silica dopant for control of the textural and structural evolution of an alumina aerogel , 1998 .

[19]  C. V. van Blitterswijk,et al.  Surface modification of nano-apatite by grafting organic polymer. , 1998, Biomaterials.

[20]  G. Martinez,et al.  Optical characterization of titania thin films produced by the solgel method and doped with co(2+) at different concentrations. , 1998, Applied optics.

[21]  R. Oréfice,et al.  Sol-Gel Transition and Structural Evolution on Multicomponent Gels Derived from the Alumina-Silica System , 1997 .

[22]  P. L'Argentiére,et al.  High active, selective and sulfur resistant supported palladium tetra-coordinated complex as catalyst in the selective hydrogenation of styrene , 1997 .

[23]  A. Wokaun,et al.  Structural characterization of intermediate species during synthesis of Al2O3-aerogels , 1997 .

[24]  R. Corriu,et al.  Organic-inorganic hybrid materials : hydrolysis and polycondensation of 1,1'-bis-silylated ferrocene derivatives , 1993 .

[25]  F. Bozon-Verduraz,et al.  Palladium-Alumina Catalysts: A Diffuse Reflectance Study. , 1993 .

[26]  J. Dewan,et al.  Preparation and reactivity of several alkylidene complexes of the type W(CHR')(N-2,6-C6H3-iso-Pr2)(OR)2 and related tungstacyclobutane complexes. Controlling metathesis activity through the choice of alkoxide ligand , 1988 .

[27]  G. Stegeman,et al.  Organic films in non-linear integrated optics structures , 1987 .

[28]  G. Nicolaon,et al.  Inorganic oxide aerogels , 1976 .

[29]  P. Robinson,et al.  Supported transition metal complexes : II. Silica as the support☆ , 1975 .

[30]  T. Rao,et al.  Thermochemical studies on the formation and constitution of the zinc oxide—aluminium oxide system , 1973 .

[31]  V. Castaño,et al.  Growth of calcium phosphate onto coagulated silica prepared by using modified simulated body fluids , 1998 .

[32]  E. Plies,et al.  Poly(Alumosiloxanes) as Matrixes for the Immobilization of Catalytically Active Ruthenium(II) Complexes1 , 1998 .

[33]  E. Kliger,et al.  Catalysts for hydrogenation of unsaturated hydrocarbons based on platinum tetraacetate complexes of aliphatic amines heterogenized on mineral supports , 1997 .

[34]  S. Katayama,et al.  Synthesis of inorganic-organic hybrids by incorporation of inorganic components into organic polymer using metal alkoxides , 1996 .

[35]  Y. Attia.  Sol-gel processing and applications , 1994 .

[36]  G. Keresztury,et al.  Raman and i.r. spectra and structure of boehmite (γ-AlOOH). Evidence for the recently discarded D172h space group , 1980 .