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

Streun, K.H. van; Piet, P.; German, Anton L.

doi:10.1016/0014-3057(87)90037-1

Cited by 21 publications

(7 citation statements)

References 13 publications

(20 reference statements)

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“…This saturation effect is comparable with that of a latex system, prepared by emulsion copolymerisation of styrene and divinylbenzene in j 8 the presence of a block copolymer of styrene and 4-vinylpyridinium iodide [17]. For homogeneous 2,4-ionene [16], the 2,4-ionene/ XAD-2 resin [4] and homogeneous qP4VP [17] saturation effects have been observed at significantly lower substrate concentrations. After a discussion concerning mass transport, the differences between these catalyst systems are discussed more quantitatively.…”

Section: Performance Of the Catalyst Towards The Oxidative Coupling Osupporting

confidence: 54%

“…For higher pH values the rate remains almost constant within experimental error. The initial increase of the rate can be explained by realising that the thiolate anion is the reactive species in the CoPcTS catal- ysed oxidative coupling of thiols [16]. For pH values above about 10 the chemisorption of hydroxide ions will considerably compete with that of the thiolate anions.…”

Section: Performance Of the Catalyst Towards The Oxidative Coupling Omentioning

confidence: 99%

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Quaternised poly(4-vinylpyridine) anchored on a macroporous poly(trimethylolpropane trimethacrylate-methylmethacrylate) resin, as cocatalyst in the cobaltphthalocyanine catalysed oxidative coupling of 2-mercaptoethanol

Ratering¹,

Meuldijk²,

Piet³

et al. 1993

Reactive Polymers

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Quaternised poly(4-vinylpyridine) anchored on a macroporous poly(trimethylolpropane trimethacrylatemethylmethacrylate) resin, as cocatalyst in the cobaltphthalocyanine catalysed oxidative coupling of 2-mercaptoethanol Ratering, M.T.; Meuldijk, J.; Piet, P.; German, A.L. Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Ratering, M. T., Meuldijk, J., Piet, P., & German, A. L. (1993). Quaternised poly(4-vinylpyridine) anchored on a macroporous poly(trimethylolpropane trimethacrylate-methylmethacrylate) resin, as cocatalyst in the cobaltphthalocyanine catalysed oxidative coupling of 2-mercaptoethanol. Reactive Polymers, Ion Exchangers, Sorbents, 19(3), 233-246. DOI: 10.1016/0923-1137(93)90081-P General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Reactive Polymers, 19 (1993) (Received November 13, 1992; accepted January 5, 1993) AbstractImmobilisation of expensive homogeneous catalysts is important for their application in commercial processes. Quaternised poly(4-vinylpyridine), which is a good promotor of the cobalt(II)phthalocyanine-tetra(sodium sulphonate) catalysed oxidative coupling of 2-mercaptoethanol, has been anchored on a macroporous resin being prepared by copolymerisation of trimethylolpropane trimethacrylate and methyl methacrylate. The performance of the catalyst was only slightly lower than that of the homogeneous analogue. This remarkable result has been attributed to the large pores, which allow a post-copolymerisation of 4-vinylpyridine with the residual double bonds leading to a flexible and accessible polymeric cocatalyst.

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Section: Performance Of the Catalyst Towards The Oxidative Coupling Osupporting

confidence: 54%

Section: Performance Of the Catalyst Towards The Oxidative Coupling Omentioning

confidence: 99%

Quaternised poly(4-vinylpyridine) anchored on a macroporous poly(trimethylolpropane trimethacrylate-methylmethacrylate) resin, as cocatalyst in the cobaltphthalocyanine catalysed oxidative coupling of 2-mercaptoethanol

Ratering¹,

Meuldijk²,

Piet³

et al. 1993

Reactive Polymers

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“…The average particle size of the latex determined from TEM micrographs was 2,6-Ionene and 2,10-ionene were 66 Ϯ 16 nm. prepared using a modified German method [42]. The numbers of the average molecular weights (M n ) were 2700 for 2,6-ionene and 4900 for 2,10-ionene, respectively, and were determined by titration with sodium hydroxide after converting their amine-terminated end groups to quaternary ammonium groups with hydrochloric acid [42].…”

Section: Materials and Instrumentationmentioning

confidence: 99%

Structural stabilities of water‐soluble MnTDCSPP, MnTSPP, and supported analogues toward hydrogen peroxide and sodium hypochlorite

Türk

Berber

2000

Int. J. Chem. Kinet.

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This article describes the structural stabilities of 5,10,15,20-tetrakis(2,6-dichloro-3-sulfonatophenyl)porphinatomanganese(III) X (X: H 2 O) (MnTDCSPP), 5,10,15,20-Ϫ OH , tetra(4-sulfonatophenyl)porphinatomanganese(III) X (X: H 2 O) (MnTSPP) and their sup-Ϫ OH , ported analogues toward H 2 O 2 and NaOCl or HOCl depending on pH. The supports employed were hexadecyltrimethylammonium bromide (CTAB), 2,6-ionene, 2,10-ionene and a poly(vinylbenzyltrimethylammonium chloride) latex, which all contain quaternary ammonium groups. In the strong basic medium, both manganese porphyrins showed high stabilities toward NaOCl but relatively lower stabilities toward H 2 O 2 , and the resistance of MnTDCSPP to degradation was higher than that of MnTSPP. In the acidic solution, both porphyrins showed increasing stabilities toward H 2 O 2 as the pH went down. Toward HOCl, MnTSPP did not show any stability in the neutral and acidic solutions, whereas MnTDCSPP showed some. The supports made some influence on their stabilities. In general, the ionenes affected their stabilities adversely, and the latex and CTAB did positively. Especially when they were bound to CTAB, they were not degraded by H 2 O 2 atThe pseudo-first-order degradation rate constants pH Ͻ 2. of MnTDCSPP, MnTSPP, and their supported analogues at different pHs at 30ЊC were determined.

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“…It is essential that the resulting latex particles do not contain any extractable soap molecules because even very low concentrations of soluble poly(quaternary ammonium salts) are capable of enhancing the reaction rate considerably. 6 The latex was synthesized according to a conventional emulsion copolymerization of styrene and divinyl benzene, with PS-qPVP as surfactant. The resulting latex contained 2.4 x mol N + dm-, as inferred from elemental analysis; the solid content was 0.26 wt%.…”

Section: Immobilization Of Ionenes and Influence On The Catalytic Actmentioning

confidence: 99%

Effects of lonenes on structure and catalytic activity of cobaltphthalocyanine, part 4. Reaction mechanism and immobilization of the catalyst on latex particles

et al. 1989

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The catalytic oxidation of 2‐mercaptoethanol was investigated kinetically for the system cobalt(II)phthalocyanine‐tetra (sodium sulphonate) in the presence of poly(quaternary ammonium salts) at pH = 8.85. From a comparison with other kinetic data a reaction mechanism could be proposed in which the specific effects of the polyelectrolyte become manifest. The effect of ionic strength on the catalytic activity was also studied. The soluble catalytic system was immobilized on latex particles by using a polymeric soap containing quaternary ammonium groups. The latex particles with the ammonium groups at the surface were used to bond the cobalt catalyst by ionogenic interaction. Using this latex supported polymeric catalyst the activity of its homogeneous counterpart could be maintained while at the same time immobilization was accomplished.

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

Cited by 21 publications

References 13 publications

Quaternised poly(4-vinylpyridine) anchored on a macroporous poly(trimethylolpropane trimethacrylate-methylmethacrylate) resin, as cocatalyst in the cobaltphthalocyanine catalysed oxidative coupling of 2-mercaptoethanol

Quaternised poly(4-vinylpyridine) anchored on a macroporous poly(trimethylolpropane trimethacrylate-methylmethacrylate) resin, as cocatalyst in the cobaltphthalocyanine catalysed oxidative coupling of 2-mercaptoethanol

Structural stabilities of water‐soluble MnTDCSPP, MnTSPP, and supported analogues toward hydrogen peroxide and sodium hypochlorite

Effects of lonenes on structure and catalytic activity of cobaltphthalocyanine, part 4. Reaction mechanism and immobilization of the catalyst on latex particles

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