Reactive Polymers, Ion Exchangers, Sorbents最新文献

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Dimerisation of ethylene catalyzed by nickel catalyst supported on porous polymers 多孔聚合物负载镍催化剂催化乙烯二聚化
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90095-5
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引用次数: 0
Stereoselective synthesis using polymeric supports 聚合物载体立体选择性合成
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90102-X
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引用次数: 0
Polymer-supported 2,2′-dipyridylmethane and some derivatives thereof: Preparation, complexation with metal ions and catalytic activity of metal complexes in hydrogenations and oligomerisations 聚合物负载的2,2 ' -二吡啶甲烷及其衍生物:制备、与金属离子的络合以及金属配合物在氢化和寡聚反应中的催化活性
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90100-6
{"title":"Polymer-supported 2,2′-dipyridylmethane and some derivatives thereof: Preparation, complexation with metal ions and catalytic activity of metal complexes in hydrogenations and oligomerisations","authors":"","doi":"10.1016/0167-6989(88)90100-6","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90100-6","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":null,"pages":null},"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)90100-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138260680","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}
引用次数: 0
Polymer-supported bidentate phosphine ligands for metal complex catalysts 金属配合物催化剂用聚合物负载双齿膦配体
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90085-2
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引用次数: 0
Preparation of amino acid ester-selective cavities formed by non-covalent imprinting with a substrate in highly cross-linked polymers 高交联聚合物底物非共价印迹形成的氨基酸酯选择性空腔的制备
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90047-5
Lars Andersson
{"title":"Preparation of amino acid ester-selective cavities formed by non-covalent imprinting with a substrate in highly cross-linked polymers","authors":"Lars Andersson","doi":"10.1016/0167-6989(88)90047-5","DOIUrl":"10.1016/0167-6989(88)90047-5","url":null,"abstract":"<div><p>Methods explored in order to make molecular imprints with phenylalanine ethyl esters in styrene and acrylic polymers using a non-covalent imprinting technique are described. Amino acid ester-selective polymers were prepared after ion-pair association of substrate (print molecule) and carboxyl-containing monomers in the polymerization step. A high concentration of cross-linking agents (divinylbenzene or ethylene glycol dimethacrylate) was present in the polymerization mixtures in order to produce macroporous polymers of high rigidity. After polymerization, polymers were washed free from print molecules and the substrate-selective polymers formed were examined by incubation of the polymers with racemic mixtures of doubly radiolabelled phenylalanine ethyl ester. Binding experiments in batch and chromatographic procedures have been performed. It was found that separation factors determined for polymers prepared in the presence of <span>d</span>- or <span>l</span>-phenylalanine ethyl ester were different from one, indicating that the polymers formed were chiral. It was also found that the polymers interacted preferentially with the enantiomer of the print molecule present in the polymerization mixture. Finally, a synthetic procedure has been worked out for making new amino acid-based cross-linkers suitable for preparation of substrate-selective acrylic polymers. The method utilizes modification of aminoalcohols by acryloyl chloride substitution.</p></div>","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":null,"pages":null},"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)90047-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79001091","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}
引用次数: 5
Polymer-bound crown ethers. II. Catalysis of several condensation reactions by polymer-bound dibenzo-18-crown-6 聚合物结合的冠醚。2聚合物结合二苯并-18-冠-6对几种缩合反应的催化作用
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90051-7
A. Zitsmanis, A. Roska, M. Klyavinsh
{"title":"Polymer-bound crown ethers. II. Catalysis of several condensation reactions by polymer-bound dibenzo-18-crown-6","authors":"A. Zitsmanis,&nbsp;A. Roska,&nbsp;M. Klyavinsh","doi":"10.1016/0167-6989(88)90051-7","DOIUrl":"10.1016/0167-6989(88)90051-7","url":null,"abstract":"<div><p>Complexes of potassium and ammonium salts or hydroxides with poly(dibenzo-18-crown-6-co-formaldehyde) were used as catalysts in several condensation reactions of aromatic aldehydes with active methylene (methyl) compounds performed in two- and three-phase systems. Activities of uncomplexed and complexed catalysts were compared.</p></div>","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":null,"pages":null},"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)90051-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79184035","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}
引用次数: 2
Immobilization of macromolecular catalysts 大分子催化剂的固定化
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90059-1
{"title":"Immobilization of macromolecular catalysts","authors":"","doi":"10.1016/0167-6989(88)90059-1","DOIUrl":"10.1016/0167-6989(88)90059-1","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":null,"pages":null},"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)90059-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"95069268","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}
引用次数: 0
Characterization of methacrylate copolymers with strong-acid or base groups using 1H NMR spectra 具有强酸或强碱基团的甲基丙烯酸酯共聚物的1H NMR表征
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90049-9
J. Hradil, H. Pivcová, J. Spěváček, F. Švec
{"title":"Characterization of methacrylate copolymers with strong-acid or base groups using 1H NMR spectra","authors":"J. Hradil,&nbsp;H. Pivcová,&nbsp;J. Spěváček,&nbsp;F. Švec","doi":"10.1016/0167-6989(88)90049-9","DOIUrl":"10.1016/0167-6989(88)90049-9","url":null,"abstract":"<div><p>The chemical shift and intensity of <sup>1</sup>H NMR bands of the hydroxylic group of a solvent (ethylene glycol, methyl alcohol) were investigated in the presence of methacrylate copolymers containing strong-acid sulfonic acid groups or strong-base tributyl ammonium groups. In addition to the OH band of the so-called “external” solvent, another OH band was detected which was due to the solvent present in the polymer bulk and bound by coordination with the functional groups just mentioned. The difference between the chemical shifts of OH protons of the “external” and “internal” solvent and the relative intensity of the “internal” OH band increase linearly with the concentration of acid functional groups; they also depend on the grain size, and to some extent on the morphology of the polymer. By using NMR spectra, it is also possible to characterize the swelling of polymers containing acid or base groups.</p></div>","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":null,"pages":null},"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)90049-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85181222","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}
引用次数: 0
The use of modified acrylonitrile-divinylbenzene copolymers in phase transfer catalysis 改性丙烯腈-二乙烯基苯共聚物在相转移催化中的应用
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90098-0
{"title":"The use of modified acrylonitrile-divinylbenzene copolymers in phase transfer catalysis","authors":"","doi":"10.1016/0167-6989(88)90098-0","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90098-0","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":null,"pages":null},"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)90098-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138260647","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}
引用次数: 0
Polymer catalysts for oxyalkylenation reactions 氧烷基化反应用聚合物催化剂
Reactive Polymers, Ion Exchangers, Sorbents Pub Date : 1988-09-01 DOI: 10.1016/0167-6989(88)90101-8
{"title":"Polymer catalysts for oxyalkylenation reactions","authors":"","doi":"10.1016/0167-6989(88)90101-8","DOIUrl":"https://doi.org/10.1016/0167-6989(88)90101-8","url":null,"abstract":"","PeriodicalId":101060,"journal":{"name":"Reactive Polymers, Ion Exchangers, Sorbents","volume":null,"pages":null},"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)90101-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138260679","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}
引用次数: 0
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