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  • Polymer and Materials Science  (32)
  • 1
    Electronic Resource
    Electronic Resource
    Hydrogenation of aldehydes and ketones catalyzed by a polysulfosiloxane-platinum complex (1994)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 5 (1994), S. 606-608 
    Details
    ISSN: 1042-7147
    Keywords: Hydrogenation ; Aldehydes ; Ketones ; Polysulfosiloxane-supported ; Platinum complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: An acidic inorganic polymer, polysulfosiloxane, has been prepared and used as ligand for preparing a polysulfosiloxane-platinum complex. It has been found that such a complex could catalyze the hydrogenation of aldehydes and ketones to alcohols, giving as much as 100% yield at room temperature and under atmospheric pressure. Temperature, S/Pt molar ratio in the complex and solvents greatly influenced the reaction. This complex was very stable and could be used several times without any change in catalytic activity.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pat.1994.220050925
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Catalytic hydrogenation of aromatic nitro compounds by non-noble metal complexes of chitosan (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 704-706 
    Details
    ISSN: 1042-7147
    Keywords: hydrogenation ; non-noble metal complexes ; chitosan ; aromatic nitro compounds ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Silica-supported mono-metal (such as Ni, Cu) complexes and mixed metal (such as Cu/Zn, Cu/Cr) complexes of chitosan have been prepared. It is found that these non-noble metal complexes could be used as efficient catalysts for the hydrogenation of aromatic nitro compounds. The effects of type of metal, reaction temperature and pressure, solvent, nitrogen/metal molar ratio in the complex catalysts on the yields from nitrobenzene to aniline have been examined. It was also found that catalysts are active for the catalytic hydrogenation of other aromatic nitro compounds such as 2-nitroanisole, 2-nitroaniline, 2-nitrotoluene and 1-chloro-4-nitrobenzene.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    Hydrogenation of m-xylene catalyzed by a silica-supported polysilazane-platinum complex (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 79-83 
    Details
    ISSN: 1042-7147
    Keywords: hydrogenation ; m-xylene ; polysilazane ; stereochemistry ; platinum complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new kind of inorganic polymer, silica-supported polysilazane (Si-N), and its platinum complex (Si-N-Pt) were prepared and characterized by X-ray photoelectron spectroscopy. It was found that Si-N-Pt can catalyze hydrogenation of m-xylene under mild conditions (30-50°C, 1 atm). The products of the reaction were cis- and trans-1,3-dimethylcyclohexane. The formation of trans-1,3-dimethylcyclohexane may be adequately explained according to the “roll-over” model. The stereoselectivity was influenced by temperature and catalyst concentration, the proportion of the cis isomer decreasing with an increase in each of the two factors. The effects of other reaction parameters, such as the N/Pt mole ratio in the complex, solvents and reaction time, etc., on the hydrogenation of m-xylene were also studied. The Si-N-Pt catalyst is very stable in reaction and turnover numbers amount to 520 in 70 hr.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Epoxidation of styrene catalyzed by metal complexes of poly(vinylbenzyl)acetylacetonate (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 729-731 
    Details
    ISSN: 1042-7147
    Keywords: epoxidation ; poly(vinylbenzyl)acetylacetonate ; cobalt complex ; molecular oxygen ; styrene ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The epoxidation of styrene to styrene oxide at higher than 96% yield has been achieved by the catalysis by poly-(vinylbenzyl)acetylacetonate complexes of cobalt(II) or manganese(II) in the presence of isobutyraldehyde under an atmospheric pressure of molecular oxygen at room temperature. The kind of aldehyde and aldehyde/styrene molar ratio greatly influenced the reaction. The catalyst could be recycled, but after recycling for five times, the yield of styrene oxide decreased from 96.0% to 84.6%.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 5
    Electronic Resource
    Electronic Resource
    Epoxidation of α-pinene with molecular oxygen catalyzed by poly(vinylbenzyl)acetylacetonate complexes of some metal ions (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 609-612 
    Details
    ISSN: 1042-7147
    Keywords: catalytic epoxidation ; α-pinene ; molecular oxygen ; poly(vinylbenzyl)acetylacetonate cobalt complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Poly(vinylbenzyl)acetylacetonate complex of cobalt is a very effective catalyst for the epoxidation of α-pinene under an atmospheric pressure of molecular oxygen at 25°C. With isobutyraldehyde as a reductant, the yield of the epoxidation of α-pinene amounts to 94.3% within 6 hr. The catalyst can be recycled at least eight times without apparent loss of activity.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 6
    Electronic Resource
    Electronic Resource
    Preparation of silica-supported polysulfoalumoxane-platinum complexes and their catalytic activity in the hydrogenation of aromatics (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 707-710 
    Details
    ISSN: 1042-7147
    Keywords: polysulfoalumoxane ; platinum complex ; hydrogenation ; aromatics ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A novel inorganic polymer, silica-supported polysulfoalumoxane, has been prepared and used as a support for preparing a silica-supported polysulfoalumoxane-platinum complex. It has been used as a catalyst for the hydrogenation of aromatics under mild conditions. The effects of several reaction parameters such as metal loading, temperature and solvents on the hydrogenation of methyl benzoate have been studied. The catalyst showed high activity and selectivity.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 7
    Electronic Resource
    Electronic Resource
    Oxidation of methanol catalyzed by silica-supported polystannazane-copper complex (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 73-75 
    Details
    ISSN: 1042-7147
    Keywords: oxidation ; methanol ; polymer-copper complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Silica-supported polystannazane-copper complex has been prepared and used as a catalyst for the oxidation of methanol. The results showed that the catalyst could catalyze the oxidation of methanol to formaldehyde at a high yield and selectivity at 30°C and under 1 atm mild conditions. The N/Cu mole ratio in the complex, temperature and the amount of NaOH additive had much influence on the catalytic activity. The complex was stable during the reaction and could be used repeatedly.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 8
    Electronic Resource
    Electronic Resource
    Oxidation of benzyl alcohol with dioxygen catalyzed by an inorganic polymer-platinum complex (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 47-49 
    Details
    ISSN: 1042-7147
    Keywords: oxygenation ; benzyl alcohol ; polytitanzane-platinum complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: An inorganic polymer-platinum complex, magnesiasupported polytitanzane-platinum complex (MgO—Ti—N—Pt), was prepared and used to catalyze the oxygenation of benzyl alcohol. It was found that this kind of catalyst has great activity and stability in the reaction. The objective product (benzaldehyde) was obtained in 100% yield in 6 hr under a moderate reaction temperature and atmospheric oxygen pressure. This inorganic polymer complex was also very stable during the reaction.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 9
    Electronic Resource
    Electronic Resource
    Oxygenation of 3-pentanol to 3-pentanone catalyzed by polymer-platinum complex (1994)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 5 (1994), S. 609-611 
    Details
    ISSN: 1042-7147
    Keywords: Oxygenation ; 3-Pentanol ; 3-Pentanone ; Polysilazane-platinum complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new inorganic polymer-platinum complex, silicasupported polysilazane-platinum complex, has been prepared and found to be capable of catalyzing the oxygenation of 3-pentanol to 3-pentanone in 100% yield at moderate temperature and under atmospheric oxygen pressure. Water is the best solvent for this reaction. This inorganic polymer complex is very stable in the reaction and can be reused several times without any appreciable change in catalytic activity.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pat.1994.220050926
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Hydrogenation of norbornene catalyzed by magnesium oxide-supported polyalumazane-platinum complexes (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 84-87 
    Details
    ISSN: 1042-7147
    Keywords: magnesium oxide-supported polyalumazane ; zero-valent platinum ; support effect ; hydrogenation of norbornene ; high performance ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A magnesium oxide-supported polyalumazane-platinum complex was synthesized and characterized by X-ray photoelectron spectroscopy (XPS) and its performance toward the hydrogenation of norbornene. XPS data indicated that a large amount of platinum existed in a zero-valent state. The catalyst showed high performance for the hydrogenation of norbornene. Its performance depended on the type of the support, the platinum loading and the reaction temperature. With 0.1544 mmol/g platinum loading at 25°C, the hydrogenation of norbornene to norbornane was completed within 2 min. Also, the turnover number of the catalyst reached 11,000 within 280 min.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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