Preparation and catalytic oxidizing potential of polymer supported chelating amine and Schiff base complexes

Drago, Russell S.; Gaul, John H.; Zombeck, Alan; Straub, Darel K.

doi:10.1021/ja00523a021

Cited by 124 publications

(37 citation statements)

References 5 publications

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“…The a,x-diamine-terminated oligo(butadiene-co-acrylonitrile) (ATBN) rubber (Hycarm ATBN) was obtained from BF Goodrich Specialty Polymers & Chemicals Division. An ATBN polymer (1 300616) with an acrylonitrile content of 18 mol-%, a Brookfield viscosity of 2610 5 mPa N s at 27 8C and a glass transition temperature of -51 8C. The molecular weight of ATBN was determined by Perkin Elmer GPC using UV detector.…”

Section: Methodsmentioning

confidence: 99%

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New catalytic systems based on intercalated polymer-montmorillonite supports

Akelah

El‐Borai

El-Aal

et al. 1999

Macromol. Chem. Phys.

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SUMMARY: A composite material was prepared by ion exchange between the ammonium salt of the a,xdiamine-terminated oligo(butadiene-co-acrylonitrile) (ATBN) and the interlamellar cation of the montmorillonite (Na-MMT). Grafted free radical polymerization of both oligo(oxyethylene)methacrylate and chloromethylstyrene supported onto the above composite was prepared. The chloromethyl groups were modified to produce onium salts which are suitable as phase transfer catalysts. The catalytic activities were investigated in nucleophilic reactions of thiocyanate, cyanate and nitrite with alkyl or aryl halides. The effects of the nature and structure of the support, amount of catalyst, solvent, and the temperature on the rate of reactions were studied.

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Section: Methodsmentioning

confidence: 99%

“…The utilization of functionalized polymers has found widespread applications in organic syntheses to catalyze various reactions [1][2][3][4][5] . The reactivity of catalysts strongly depends on the structure of the polymer backbone, the structure and the amount of the active groups introduced into the polymer backbone.…”

Section: Introductionmentioning

confidence: 99%

New catalytic systems based on intercalated polymer-montmorillonite supports

Akelah

El‐Borai

El-Aal

et al. 1999

Macromol. Chem. Phys.

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“…The supported catalysts are easily recovered without any substantial loss in their catalytic activity [1][2] but homogeneous catalysts are not recovered easily. The Schiff base complexes of transition metal ions shown high catalytic activities in various chemical reactions such as epoxidation of olefins, [3] oxidation, [4][5] and polymerization of ethylene, [6][7] but polymer-supported metal complexes showed high catalytic activity [4,5,[8][9][10], in comparison to homogeneous catalysts. The manganese(II) salen complexes anchored on tailor-made polymers were more enantioselective without any mass transfer limitation for alkenes on polymer supports.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Structural Studies of Nickel Complex Supported by-ONNO-Tetra Dentate Schiff-Base Ligand: Efficient Catalysts for Oxidation of Phenol

Sutar¹

2013

IJMSA

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Abstract:The free and polymer anchored complex of nickel [3-MHBdMBn-Ni and P-3-MHBdMBn-Ni], supported by -ONNO-tetradentate Schiff-base ligand are prepared by the reactions of nickel solution with one molar equivalent of unsupported 3-MHBdMBn (N, N'-bis (2-hydroxy-3-methylbenzaldehyde) 4-Methylbenzene-1,2-diamine) or polymer supported (P-3-MHBdMBn) Schiff-base ligands in methanol. The structural study reveal that nickel (II) complex of 3-MHBdMBn Schiff base is square planar in geometry. Complexation of nickel ion increased the thermal stability of 3-MHBdMBn Schiff base. The catalytic activity of nickel complex towards the oxidation of phenol is investigated in the presence of hydrogen peroxide. Experimental results indicate that the reactivity of P-3-MHBdMBn-Ni is dramatically affected by the polymer support over 3-MHBdMBn-Ni and the rate of oxidation (R p ) for unsupported one is 1.28 x 10 -6 mole dm -3 s -1 and for supported analogue is 1.99 x 10 -6 mole dm -3 s -1 .

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“…A number of ligands including polydentate amines, crown ethers, phosphines and bipyridines have been bound with mainly polystyrene divinylbenzene copolymers (2)(3)(4)(5)(6) . These studies are mostly concerned with ionbinding and catalytic (7) aspects.…”

Section: Introductionmentioning

confidence: 99%

http://jnus.org/pdf/1/2007/1/190.pdf

Yousif¹,

Hameed²,

Bakir³

2007

JNUS

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Poly(vinyl chloride) (PVC) has been reacted with 2-amino-5-(phenyl)-1,3,4-thiadiazole(L I ), 2-amino-5-(p-nitro phenyl)-1,3,4-thiadiazole(L II ), 2-mercapto-5-phenyl 1,3,4-oxadiazole(L III ) and 2-mercapto-5-(p-hydroxy phenyl) 1,3,4-oxadiazole(L IV ) in THF to form the modified PVC , which has been characterized by spectroscopic methods.The photostabilization of PVC-L films compounds was investigated, the photostabilization activity of these compounds were determined by monitoring the carbonyl and polyene indices with irradiation time.All results obtained show that the rate of photodegradation of PVC-L films, 30 micrometer in thickness following the trends:According to the experimental results obtained, mechanism were suggested depending on the structure of the PVC-L compounds.

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Preparation and catalytic oxidizing potential of polymer supported chelating amine and Schiff base complexes

Cited by 124 publications

References 5 publications

New catalytic systems based on intercalated polymer-montmorillonite supports

New catalytic systems based on intercalated polymer-montmorillonite supports

Synthesis and Structural Studies of Nickel Complex Supported by-ONNO-Tetra Dentate Schiff-Base Ligand: Efficient Catalysts for Oxidation of Phenol

http://jnus.org/pdf/1/2007/1/190.pdf

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