Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90083-9
{"title":"Immobilization of 2,4-ionene on an XAD-2 resin, and its effect on the cobaltphthalocyanine-catalyzed oxidative coupling of thiol","authors":"","doi":"10.1016/0167-6989(88)90083-9","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90083-9","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Page 131"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90083-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138305311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90048-7
T.I. Davidenko, S.A. Andronati
Immobilization of microsomal fractions, proteolytic enzymes and urease on polyethylene-grafted poly(acrylic acid), poly(allyl alcohol) and poly(allylamine) was investigated. Immobilization of microsomal fractions on polyethylene-grafted poly(allyl alcohol) and poly(acrylic acid) preserved 108 and 31.5% of aniline hydroxylase activity and 125 and 109% of N,N-dimethylaniline demethylase activity, respectively. An increased pH, temperature, and storage stability of the immobilized microsomes was observed. Column operation was performed as well. Positive results were also obtained in the immobilization of urease and Bacillus mesentericus protease.
{"title":"Microsomes and enzymes immobilized on grafted polyethylenes","authors":"T.I. Davidenko, S.A. Andronati","doi":"10.1016/0167-6989(88)90048-7","DOIUrl":"10.1016/0167-6989(88)90048-7","url":null,"abstract":"<div><p>Immobilization of microsomal fractions, proteolytic enzymes and urease on polyethylene-grafted poly(acrylic acid), poly(allyl alcohol) and poly(allylamine) was investigated. Immobilization of microsomal fractions on polyethylene-grafted poly(allyl alcohol) and poly(acrylic acid) preserved 108 and 31.5% of aniline hydroxylase activity and 125 and 109% of <em>N,N</em>-dimethylaniline demethylase activity, respectively. An increased pH, temperature, and storage stability of the immobilized microsomes was observed. Column operation was performed as well. Positive results were also obtained in the immobilization of urease and <em>Bacillus mesentericus</em> protease.</p></div>","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Pages 43-50"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90048-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78022704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90046-3
André Deratani, Thierry Maraldo, Graham D Darling , Jean M.J Fréchet
In order to optimize the design of polymer-bound dialkylaminopyridine catalysts, several such heterogeneous catalysts have been evaluated in the acylation of a hindered tertiary alcohol. In particular, the microenvironment and local polarity near the catalytic sites and its influence on catalyst performance has been studied. Comparisons with literature data provide an explanation for some of the differences in reactivities observed by others and confirm that it is important to design the catalysts such that their reactive sites are surrounded by non-polar moieties. Novel approaches such as the grafting of reactive groups onto polyethylene or polytetrafluoroethylene have been tested.
{"title":"Towards the optimization of polymer-supported catalysts: Relationship between local reaction medium and catalyst efficiency","authors":"André Deratani, Thierry Maraldo, Graham D Darling , Jean M.J Fréchet","doi":"10.1016/0167-6989(88)90046-3","DOIUrl":"10.1016/0167-6989(88)90046-3","url":null,"abstract":"<div><p>In order to optimize the design of polymer-bound dialkylaminopyridine catalysts, several such heterogeneous catalysts have been evaluated in the acylation of a hindered tertiary alcohol. In particular, the microenvironment and local polarity near the catalytic sites and its influence on catalyst performance has been studied. Comparisons with literature data provide an explanation for some of the differences in reactivities observed by others and confirm that it is important to design the catalysts such that their reactive sites are surrounded by non-polar moieties. Novel approaches such as the grafting of reactive groups onto polyethylene or polytetrafluoroethylene have been tested.</p></div>","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Pages 19-28"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90046-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88266834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90054-2
R. Stamenova , P. Ivanova , R. Boeva , C. Tsvetanov
Polymer-immobilized metal complexes were prepared by sorption of FeCl3 and chromium compounds on latex particles of crosslinked 4-vinylpyridine-poly(ethylene oxide) copolymers. Catalytic activity and selectivity of these complexes in the esterification reaction of methacrylic acid and ethylene oxide were studied. They provide high degrees of conversion (96–100%) with minor formation of by-products. On repeated use the catalytic activity slightly decreases.
{"title":"FeCl3 immobilized on crosslinked 4-vinylpyridine-poly(ethylene oxide) copolymers as catalyst in the synthesis of 2-hydroxyethyl methacrylate","authors":"R. Stamenova , P. Ivanova , R. Boeva , C. Tsvetanov","doi":"10.1016/0167-6989(88)90054-2","DOIUrl":"10.1016/0167-6989(88)90054-2","url":null,"abstract":"<div><p>Polymer-immobilized metal complexes were prepared by sorption of FeCl<sub>3</sub> and chromium compounds on latex particles of crosslinked 4-vinylpyridine-poly(ethylene oxide) copolymers. Catalytic activity and selectivity of these complexes in the esterification reaction of methacrylic acid and ethylene oxide were studied. They provide high degrees of conversion (96–100%) with minor formation of by-products. On repeated use the catalytic activity slightly decreases.</p></div>","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Pages 91-98"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90054-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88659314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90055-4
A.M. Bochkin, A.D. Pomogailo, F.S. Dyachkovskii
A new method for synthesis of polymer-supported organometallic titanium-magnesium catalysts was developed. The catalysts contain up to 55% of total fixed Ti in the form of isolated Ti(III) ions. Ti(III) is formed in the alkylation of Ti(IV) by polymer-supported Mg species. Ti(III) is assumed to coordinate to the polymer support moieties at low Ti(III) content, and to form layers at high Ti(III) content in the catalysts. X-ray analysis indicated the presence of crystallites with dimensions of approximately 4–7.5 nm. The catalytic activity in ethylene polymerization depends on the amount of fixed magnesium. A correlation between catalyst activity and isolated Ti(III) ion content was found. Kinetic parameters of the polymerization in the presence of titanium-magnesium catalysts supported on organic and inorganic carriers were compared. Rate constants for chain transfer to monomer, organoaluminium cocatalysts and hydrogen were calculated.
{"title":"Polymer-supported titanium-magnesium catalysts for ethylene polymerization","authors":"A.M. Bochkin, A.D. Pomogailo, F.S. Dyachkovskii","doi":"10.1016/0167-6989(88)90055-4","DOIUrl":"10.1016/0167-6989(88)90055-4","url":null,"abstract":"<div><p>A new method for synthesis of polymer-supported organometallic titanium-magnesium catalysts was developed. The catalysts contain up to 55% of total fixed Ti in the form of isolated Ti(III) ions. Ti(III) is formed in the alkylation of Ti(IV) by polymer-supported Mg species. Ti(III) is assumed to coordinate to the polymer support moieties at low Ti(III) content, and to form layers at high Ti(III) content in the catalysts. X-ray analysis indicated the presence of crystallites with dimensions of approximately 4–7.5 nm. The catalytic activity in ethylene polymerization depends on the amount of fixed magnesium. A correlation between catalyst activity and isolated Ti(III) ion content was found. Kinetic parameters of the polymerization in the presence of titanium-magnesium catalysts supported on organic and inorganic carriers were compared. Rate constants for chain transfer to monomer, organoaluminium cocatalysts and hydrogen were calculated.</p></div>","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Pages 99-107"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90055-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90333399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90114-6
{"title":"Synthesis and structure investigation of immobilized heterometallic complexes","authors":"","doi":"10.1016/0167-6989(88)90114-6","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90114-6","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Page 142"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90114-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138241490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90115-8
{"title":"Immobilized mono- and binuclear chelates of nickel(II) and cobalt(II)","authors":"","doi":"10.1016/0167-6989(88)90115-8","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90115-8","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Page 142"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90115-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138241491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90106-7
{"title":"Polybenzimidazole resin based new chelating agents. Ferric ion selectivity of resins with immobilized polyamines","authors":"","doi":"10.1016/0167-6989(88)90106-7","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90106-7","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Page 139"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90106-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138260148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1988-09-01DOI: 10.1016/0167-6989(88)90109-2
{"title":"Preparation and photochemical properties of polymers containing 1-(4-benzylphenyl or 4-benzoylphenyl)-2-propen-1-one structural units","authors":"","doi":"10.1016/0167-6989(88)90109-2","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90109-2","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":"9 1","pages":"Page 140"},"PeriodicalIF":0.0,"publicationDate":"1988-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0167-6989(88)90109-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138260152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号