Autoxidation of mercaptans promoted by a bifunctional catalyst prepared by polymer attachment of cobalt- phthalocyanine

Schutten, J.H.; Zwart, J.

doi:10.1016/0304-5102(79)80071-1

Cited by 79 publications

(14 citation statements)

References 13 publications

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“…the oxidative coupling of thiols to disulphides in the presence of the catalyst, cobalt(II)phthalocyaninetetra-sodium sulphonate (CoTSPc, 1, Scheme 1) S09No activity [2,3]. Two major effects are believed to cause this phenomenon: (1) coulombic interaction between the negative charge of the sulphonate groups of CoTSPc and the positive charge on the polymer Scheme 2. Synthesis of 2,4-ionene.…”

Section: Introductionmentioning

confidence: 99%

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Effects of 2,4-ionenes of different molar masses on the oxidative coupling of thiol catalyzed by cobaltphthalocyanine

Streun

Piet

German

1987

European Polymer Journal

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Section: Introductionmentioning

confidence: 99%

“…Synthesis of 2,4-ionene. [1,2]. Especially poly(vinylamine) (PVAm) and 2,4-ionene, a poly(quaternary ammonium) salt (2, Scheme 2) were found to give a surprisingly high increase in reaction rate.…”

Section: Introductionmentioning

confidence: 99%

Effects of 2,4-ionenes of different molar masses on the oxidative coupling of thiol catalyzed by cobaltphthalocyanine

Streun

Piet

German

1987

European Polymer Journal

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“…Due to such advantages of rare-earth metal phthalocyanines as ease of synthesis, nontoxicity, and optimality of electrical characteristics, they (covalently bound with a polymer matrix) can be used as organic materials that ensure highly effective photoelectric transformation of energy and effective luminescence [47]. Conducting aromatic and heterocyclic polymers are used in creating such photoelectric cells: poly-p-phenylenevinylenes, polyanilines, polypyrroles, and polythiophenes.…”

Section: Use Of Phthalocyanine Polymers In Optics and Electronicsmentioning

confidence: 99%

Prospects for development of phthalocyanine-containing polymeric materials

Lbova

Vasil'ev

2008

Fibre Chem

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ev UDC 547.712.25Ways of manufacturing polymeric phthalocyanine-containing materials in the form of fibres, films, membranes, and nanostructures, used as photosensitizers, in medicine, in solving environmental problems, and as working electrochemical elements in highly sensitive sensors and gas analyzers, are proposed. Polymer composites with incorporated phthalocyanines have high thermo-and photostable properties and low combustibility. The possibility of synthesizing phthalocyanine nanocrystals in different polymer matrices is demonstrated. These composites, which have optical homogeneity, are new optical media made from organic substances with optical and semiconductor properties.Due to the perfect structure and unique properties, tetraarenoporphyrazines and their metal complexes have been investigated in different areas of science -from quantum chemistry to applied physics and medicine. The regularity of the molecular structure of these compounds, its similarity to the biologically important chlorophyll, heme, vitamin B 12 , and cytochrome make it possible to manufacture materials with uniquely effective and technically valuable properties.Systematic studies of subgroups of these compounds -phthalocyanines of their metal complexes, and closest structural analogs -have been reflected in monographs and handbooks [1][2][3][4][5][6][7][8]. Phthalocyanine (H 2 Pc) was initially identified as a substance with high dyeing power with respect to different materials. Its metal complexes are supramolecular compounds (Fig. 1). Their specific molecular structure is due to the planar configuration of the inner 16-member ring (macrocycle) and the presence of conjugation along the entire contour. For this reason, metal phthalocyanines have varied properties -catalytic, optical, adsorption.Phthalocyanines include a large number of compounds of different structure and the number is growing. The development of phthalocyanine chemistry is due to the comparatively uncomplicated methods of synthesizing them with good yields of the reactions. The elevated stability of phthalocyanines and the possibility of their purposeful synthesis from different compounds with previously assigned properties allows using them as convenient polymer modifiers. Modification can be conducted both in bulk and on the surface, by grafting, to impart the specific properties characteristic of this class of compounds.The evolution of polymer composite technology is opening up prospects for creating materials made from synthetic phthalocyanines supported on a polymer matrix by a method in which such compounds would exhibit the highest activity [9][10][11]. Attaching the phthalocyanines in a polymer support offers many advantages which do not exist when unattached phthalocyanines are used. They include cooperative reactions in polymer chains, separation of active sites, the possibility of specific binding of different substrates on active sites, increasing the stability of the tetrapyrrole component, and the decrease in its toxicity with respect to biological...

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“…[40][41][42][43][44], to cross-linked polyacrylamide (refs. [45][46], and to soluble and cross-linked poly(viny1amine) (refs.…”

Section: Cobalt-catalyzed Autoxidationsmentioning

confidence: 99%

Catalysts supported on polymer colloids

1988

Reactive Polymers, Ion Exchangers, Sorbents

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-Polymer colloids containing tetraakylphosphonium ions as phase transfer catalysts and cobalt ions as autoxidation catalysts have been prepared by emulsion polymerization and subsequent functional group transformations on the colloids. The 0.27 pm colloidal phase transfer catalysts are more active for reaction of cyanide ion with benzyl bromide than are the analogous 20 pm spherical bead catalysts, but the high electrolyte strengths used in phase transfer catalysis cause the colloids to coagulate. Cobalt phthalocyanine tetrasulfonate bound to ion exchange colloids catalyzes autoxidation of 2,6-di-t-butylphenol. Cobalt ions bound as carboxylic acid salts to poly(acrylic acid) and poly(methacrylic acid) copolymer latexes in the presence of amine ligands catalyze autoxidation of tetralin.

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Autoxidation of mercaptans promoted by a bifunctional catalyst prepared by polymer attachment of cobalt- phthalocyanine

Cited by 79 publications

References 13 publications

Effects of 2,4-ionenes of different molar masses on the oxidative coupling of thiol catalyzed by cobaltphthalocyanine

Effects of 2,4-ionenes of different molar masses on the oxidative coupling of thiol catalyzed by cobaltphthalocyanine

Prospects for development of phthalocyanine-containing polymeric materials

Catalysts supported on polymer colloids

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