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Self-assembly and immobilization of liposomes in fused-silica capillary by avidin–biotin binding 亲和素-生物素结合在熔融二氧化硅毛细管中脂质体的自组装和固定化
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00122-9
Qing Yang , Xue-Ying Liu , Jun Miyake , Hideki Toyotama
{"title":"Self-assembly and immobilization of liposomes in fused-silica capillary by avidin–biotin binding","authors":"Qing Yang ,&nbsp;Xue-Ying Liu ,&nbsp;Jun Miyake ,&nbsp;Hideki Toyotama","doi":"10.1016/S0968-5677(98)00122-9","DOIUrl":"10.1016/S0968-5677(98)00122-9","url":null,"abstract":"<div><p>Small and large unilamellar biotinylated liposomes (SUVs and LUVs) composed of egg phosphatidylcholine and 2<!--> <!-->mol% of biotinylated phosphatidylethanolamine were assembled in the presence of avidin at a low concentration (0.05–0.1<!--> <!-->mg<!--> <!-->ml<sup>-1</sup>) and simultaneously immobilized in fused-silica capillary tubing. LUV assemblies were immobilized to 21<!--> <!-->nmol phospholipid in one capillary, about twice as high as found for the SUV assemblies. Estimated values showed that the capillary inner surface was coated by 4–15 liposome layers. The liposome-coated capillary can be used in capillary electrophoresis for microanalysis of drug-membrane interactions. This avidin–biotin-assembly method may also be applied to immobilize liposomes or proteoliposomes in a high order on a planar solid surface for construction of biomaterials.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 769-772"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00122-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80295758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Langmuir–Blodgett film formation and photocurrent generation of a C60 pyrrolidine derivative C60(C8H15NO2) C60吡啶衍生物C60(C8H15NO2)的Langmuir-Blodgett膜形成和光电流的产生
Supramolecular Science Pub Date : 1998-10-01 DOI: 10.1016/S0968-5677(98)00050-9
Yanyi Huang, Liangbing Gan, Chun-Hui Huang, Fanyu Meng
{"title":"Langmuir–Blodgett film formation and photocurrent generation of a C60 pyrrolidine derivative C60(C8H15NO2)","authors":"Yanyi Huang,&nbsp;Liangbing Gan,&nbsp;Chun-Hui Huang,&nbsp;Fanyu Meng","doi":"10.1016/S0968-5677(98)00050-9","DOIUrl":"10.1016/S0968-5677(98)00050-9","url":null,"abstract":"<div><p>A novel C<sub>60</sub> pyrrolidine derivative, C<sub>60</sub>(C<sub>8</sub>H<sub>15</sub>NO<sub>2</sub>) (1), has been synthesized and its Langmuir and LB films were investigated. The monolayer of 1 can be transferred on to hydrophilic substrates. Photocurrent generation of the LB film modified ITO electrode has been measured. The anodic photocurrent can be suppressed by oxygen and enhanced by the electron donor Vc (ascorbic acid). The quantum yield is 1.9% with the concentration of Vc at 0.5<!--> <!-->mg<!--> <!-->ml<sup>-1</sup> in the KCl solution.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 457-460"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00050-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89474723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Effects of macromolecules on the crystallization of CaCO3 the Formation of Organic/Inorganic Composites 大分子对CaCO3结晶及有机/无机复合材料形成的影响
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00041-8
Takashi Kato , Takuo Suzuki , Takahiro Amamiya , Taku Irie , Makoto Komiyama , Hiroshi Yui
{"title":"Effects of macromolecules on the crystallization of CaCO3 the Formation of Organic/Inorganic Composites","authors":"Takashi Kato ,&nbsp;Takuo Suzuki ,&nbsp;Takahiro Amamiya ,&nbsp;Taku Irie ,&nbsp;Makoto Komiyama ,&nbsp;Hiroshi Yui","doi":"10.1016/S0968-5677(98)00041-8","DOIUrl":"10.1016/S0968-5677(98)00041-8","url":null,"abstract":"<div><p>The effects of macromolecules as soluble additives and solid matrices have been examined for the crystallization of CaCO<sub>3</sub>. A vaterite form grows on a glass substrate in the presence of poly(glutamic acid) (PGA) containing a carboxylic acid group as a soluble additive. In contrast, no crystal growth has been observed when poly(acrylic acid) (PAA) exists as an additive though it has the same functional group. The conformation or the backbone structure of the polymers may have an influence on the crystal polymorph of CaCO<sub>3</sub>. Thin film states of CaCO<sub>3</sub> crystals have been obtained as organic/inorganic composites with chitosan that acts as a solid matrix in the presence of PAA or PGA as a soluble additive.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 411-415"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00041-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88323405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 131
Photopolymerization of 4-vinylbenzoate and m- and p-phenylenediacrylates in hydrotalcite interlayers 4-乙烯基苯甲酸酯和间、对苯基二丙烯酸酯在水滑石夹层中的光聚合
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00023-6
Tetsuya Shichi, Shinsuke Yamashita, Katsuhiko Takagi
{"title":"Photopolymerization of 4-vinylbenzoate and m- and p-phenylenediacrylates in hydrotalcite interlayers","authors":"Tetsuya Shichi,&nbsp;Shinsuke Yamashita,&nbsp;Katsuhiko Takagi","doi":"10.1016/S0968-5677(98)00023-6","DOIUrl":"10.1016/S0968-5677(98)00023-6","url":null,"abstract":"<div><p>Photopolymerizations of intercalated 4-vinylbenzoate (VBA) and <em>p</em>-(or <em>m</em>-) phenylenediacrylates (PDA) were investigated in the presence of an anion exchange clay, hydrotalcite. UV irradiation of clay powder adsorbing VBA and 4-benzoylbenzoate (BBA) ions gave rise to the cyclodimerization of the olefin and a radical polymerization to form polyvinylbenzoate. The degree of the polymerization was 10–10<sup>3</sup>. The stereoregularity was investigated by NMR analysis and is discussed in relation to the state of molecular aggregation in the clay interlayers. In contrast to VBA, photoreaction of the intercalated PDAs resulted in the formation of oligomers in [2+2] cycloaddition manner, of which the polymerization degrees were rather low (up to ten at most). The stereochemistry of the oligomer was revealed to be of a <em>syn</em>-head-to-head structure by NMR analysis. Dianionic molecules such as PDAs showed an interesting intercalation behavior in contrast to monoanions, i.e. just one double-negatively charged molecule was estimated to occupy three anion exchange sites of the hydrotalcite layer. Also, the relatively low polymerization degrees of the PDAs were found to be due to the above intercalation characteristics. Powder X-ray diffraction analysis showed that the molecular aggregation state was remarkably changed by desiccating the clay composite in vacuum, thus suppressing the efficiency of the photoreaction.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 303-308"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00023-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87331559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Synthesis of molecularly imprinted polymer of βcyclodextrin for the efficient recognition of cholesterol β环糊精分子印迹聚合物的合成及其对胆固醇的有效识别
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00042-X
Hiroyuki Asanuma, Masaya Kakazu, Masahiko Shibata, Takayuki Hishiya, Makoto Komiyama
{"title":"Synthesis of molecularly imprinted polymer of βcyclodextrin for the efficient recognition of cholesterol","authors":"Hiroyuki Asanuma,&nbsp;Masaya Kakazu,&nbsp;Masahiko Shibata,&nbsp;Takayuki Hishiya,&nbsp;Makoto Komiyama","doi":"10.1016/S0968-5677(98)00042-X","DOIUrl":"10.1016/S0968-5677(98)00042-X","url":null,"abstract":"<div><p>Polymeric receptors for cholesterol were synthesized by crosslinking <em>β</em>-cyclodextrin (<em>β</em>-CyD) with hexamethylene diisocyanate or toluene 2,4-diisocyanate in dimethyl sulfoxide (DMSO) in the presence of cholesterol as the template. Non-imprinted <em>β</em>-CyD polymers were much poorer in the cholesterol adsorption. When <em>β</em>-CyD was cross-linked by epichlorohydrin in aqueous alkaline solutions (even in the presence of cholesterol), the cholesterol adsorbing activity was nil. Use of DMSO as the cross-linking solvent is necessary for the imprinting, since <em>β</em>-CyD molecules form inclusion complexes with cholesterol in this solvent and thus their mutual conformation in the polymer is regulated appropriately for cholesterol binding. The adsorbed cholesterol was completely removed from the polymers by treating the adducts with ethanol, indicating a strong potential for practical applications.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 417-421"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00042-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84738122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 52
Molecular patterning with a two-dimensional network polymer LB film 2: Drawing patterns by an electron beam 二维网状聚合物LB膜的分子图谱2:电子束绘制图谱
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00032-7
Tokuji Miyashita, Masakazu Nakaya, Atsushi Aoki
{"title":"Molecular patterning with a two-dimensional network polymer LB film 2: Drawing patterns by an electron beam","authors":"Tokuji Miyashita,&nbsp;Masakazu Nakaya,&nbsp;Atsushi Aoki","doi":"10.1016/S0968-5677(98)00032-7","DOIUrl":"10.1016/S0968-5677(98)00032-7","url":null,"abstract":"<div><p>Electron beam lithography was investigated using a cross-linkable polymer Langmuir–Blodgett (LB) film. Cross-linking reaction occurs in the LB film with electron beam irradiation as well as UV light irradiation and the irradiated LB film becomes insoluble in the organic solvents to form a two-dimensional network in the LB film. The sensitivity and contrast of the cross-linkable polymer LB film are 3<!--> <!-->μC<!--> <!-->cm<sup>-2</sup> and 0.64, respectively. The limiting resolution of patterning is 0.2<!--> <!-->μm line-and-space. The electron beam lithography using the cross-linkable polymer LB film is applicable to the future nanotechnology.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 363-365"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00032-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77769295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Tailored syntheses of nanostructured silicas: Control of particle morphology, particle size and pore size 纳米结构二氧化硅的定制合成:颗粒形态、粒径和孔径的控制
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00016-9
Gunter Büchel , Michael Grün , Klaus K. Unger , Akihiko Matsumoto , Kazuo Tsutsumi
{"title":"Tailored syntheses of nanostructured silicas: Control of particle morphology, particle size and pore size","authors":"Gunter Büchel ,&nbsp;Michael Grün ,&nbsp;Klaus K. Unger ,&nbsp;Akihiko Matsumoto ,&nbsp;Kazuo Tsutsumi","doi":"10.1016/S0968-5677(98)00016-9","DOIUrl":"10.1016/S0968-5677(98)00016-9","url":null,"abstract":"<div><p>Ordered mesoporous silicas with spherical morphology and average particle size in the range between 100<!--> <!-->nm and 2<!--> <!-->μm were synthesised according to two novel routes. Both synthesis routes used tetraethoxysilane, water, alcohol and aqueous ammonia for producing spherical silica beads. The porosity was created by adding two different kinds of pore structure directing agents to the starting solution: one was an <em>n</em>-alkyltrialkoxysilane which was covalently bonded to the silica framework, the other was an <em>n</em>-alkylamine which acted as a nonionic template. After calcination and post treatment the resulting particles showed a specific surface area up to 1000<!--> <!-->m<sup>2</sup> <!-->g<sup>-1</sup>, a specific pore volume of up to 0.8<!--> <!-->cm<sup>3</sup>g<sup>-1</sup> and an average pore diameter between 2 and 6<!--> <!-->nm.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 253-259"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00016-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88035657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 95
Structural characterisation of micro- and mesoporous materials by electron microscopy 微孔和介孔材料的电子显微镜结构表征
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00006-6
O. Terasaki , Y. Sakamoto , J. Yu , Y. Nozue , T. Ohsuna , N. Ohnishi , Y. Horikawa , K. Hiraga , G. Zhu , S. Qiu , R. Xu , M. Anderson
{"title":"Structural characterisation of micro- and mesoporous materials by electron microscopy","authors":"O. Terasaki ,&nbsp;Y. Sakamoto ,&nbsp;J. Yu ,&nbsp;Y. Nozue ,&nbsp;T. Ohsuna ,&nbsp;N. Ohnishi ,&nbsp;Y. Horikawa ,&nbsp;K. Hiraga ,&nbsp;G. Zhu ,&nbsp;S. Qiu ,&nbsp;R. Xu ,&nbsp;M. Anderson","doi":"10.1016/S0968-5677(98)00006-6","DOIUrl":"10.1016/S0968-5677(98)00006-6","url":null,"abstract":"<div><p>Zeolites are one of the most important materials currently used in the petroleum industry for a wide variety of catalytic transformations. However, they are increasingly being considered for other applications such as for designing quantum-confined materials in their spaces. With such applications in mind, precise characterisation of zeolites and related porous materials has never been more necessary. Here we show how electron diffraction coupled with high-resolution imaging can reveal the detailed fine structure in both the bulk and at the surface of these materials. A variety of case studies are considered which include ETS-10, FAU, LTL and FSM-16.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 189-195"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00006-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91453420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Photochemical responses of asymmetrically self-organized molecular films prepared on a water surface 在水面制备的非对称自组织分子膜的光化学反应
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00035-2
Sunao Yamada, Yu-ki Tanaka, Mitsuhiro Kawazu, Taku Matsuo
{"title":"Photochemical responses of asymmetrically self-organized molecular films prepared on a water surface","authors":"Sunao Yamada,&nbsp;Yu-ki Tanaka,&nbsp;Mitsuhiro Kawazu,&nbsp;Taku Matsuo","doi":"10.1016/S0968-5677(98)00035-2","DOIUrl":"10.1016/S0968-5677(98)00035-2","url":null,"abstract":"<div><p>Ultrathin polymer films incorporating amphiphilic ruthenium (II) polypyridine complex (Ru2C16B) or viologen (LPV) were prepared by casting a mixed solution on a water surface. Interfacial photoinduced energy-transfer from coumarin dye (CoD) on the glass plate to Ru2C16B in the polymer film indicated asymmetric population of Ru2C16B at a single surface of the film. Phoinduced electron-transfer from Ru2C16B to LPV across the films also verified asymmetric enrichment of these amphiphilic dyes. The results establish a novel and simple method of asymmetric self-organization of amphiphilic dyes in the thin polymer film.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 379-382"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00035-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80719498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Cr cluster deposition by plasma—gas-condensation method 等离子体-气体凝聚法沉积铬团簇
Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00014-5
Saeki Yamamuro, Kenji Sumiyama, Masaki Sakurai, Kenji Suzuki
{"title":"Cr cluster deposition by plasma—gas-condensation method","authors":"Saeki Yamamuro,&nbsp;Kenji Sumiyama,&nbsp;Masaki Sakurai,&nbsp;Kenji Suzuki","doi":"10.1016/S0968-5677(98)00014-5","DOIUrl":"10.1016/S0968-5677(98)00014-5","url":null,"abstract":"<div><p>Transmission electron microscopy observation was carried out for nanometric Cr clusters deposited on microgrids at room temperature using plasma–gas-condensation (PGC) method. In order to obtain optimum conditions for monodisperse cluster formation we have studied effects of an Ar gas pressure, an Ar gas flow rate, and a mixing rate of He gas with Ar gas on the size distribution of formed clusters. It has been found that monodisperse clusters with the size rage of 9–13<!--> <!-->nm in diameter are producible at a low Ar gas pressure (≤1.3<!--> <!-->Torr) and a low Ar gas flow rate (≤600<!--> <!-->sccm). The mean cluster size decreases with decreasing Ar gas pressure, while it is not sensitive to the Ar gas flow rate. When He gas is mixed with Ar gas, the mean cluster size further decreases to 6<!--> <!-->nm and the cluster beam intensity becomes stronger probably because He gas with the high thermal conductivity enhances supersaturation for cluster nucleation.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 239-245"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00014-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78450913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 41
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