Supramolecular Science最新文献_第9页

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

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

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

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, Shinsuke Yamashita, Katsuhiko Takagi","doi":"10.1016/S0968-5677(98)00023-6","DOIUrl":"10.1016/S0968-5677(98)00023-6","url":null,"abstract":"<div>Photopolymerizations of intercalated 4-vinylbenzoate (VBA) and p-(or m-) 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 10–103. 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 syn-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.</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

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

引用次数: 4

Biomineralization of magnetic iron minerals in bacteria 磁性铁矿物在细菌中的生物矿化

Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00036-4

Richard B. Frankel , Dennis A. Bazylinski , Dirk Schüler

引用次数: 55

Photoresponsive monolayers on water and solid surfaces 水和固体表面的光响应单层膜

Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00034-0

Takahiro Seki, Hidehiko Sekizawa, Keisuke Tanaka, Yoko Matsuzawa, Kunihiro Ichimura

{"title":"Photoresponsive monolayers on water and solid surfaces","authors":"Takahiro Seki, Hidehiko Sekizawa, Keisuke Tanaka, Yoko Matsuzawa, Kunihiro Ichimura","doi":"10.1016/S0968-5677(98)00034-0","DOIUrl":"10.1016/S0968-5677(98)00034-0","url":null,"abstract":"<div>Organic photochromic units and molecules can be regarded as light-driven nano molecular machines. Once such molecules are aligned at a surface, the supramolecular organization provides an efficient macroscopic mechanical response in a collective way. Amphiphilic polymers having an azobenzene (Az) side chain are the favorable materials for observation of such effects since they show marked photomechanical response with essentially full reversibility. An in situ Brewster angle microscopic observation showed marked morphological and rheological photoinduced changes in the molecular films. Moreover, we have newly found that the identical photosensitive molecular film transferred on to a solid mica surface shows large morphological changes under highly humid conditions as proven by atomic force microscopy (AFM). It is supposed that the molecular film is driven in the same mechanism both on water and water-adsorbed mica surfaces. These microscopic observations provide new insights of the photomechanical response in photochromic monolayers.</div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 373-377"},"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)00034-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74574177","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: 5

Molecular nanosheets of quasi-TiO2: preparation and spontaneous reassembling 准tio2分子纳米片的制备及其自发重组

Supramolecular Science Pub Date : 1998-07-01 DOI: 10.1016/S0968-5677(98)00033-9

Takayoshi Sasaki

{"title":"Molecular nanosheets of quasi-TiO2: preparation and spontaneous reassembling","authors":"Takayoshi Sasaki","doi":"10.1016/S0968-5677(98)00033-9","DOIUrl":"10.1016/S0968-5677(98)00033-9","url":null,"abstract":"<div>This paper reviews our recent progress in synthesis, optical properties and reassembling behaviour of nanosheet-crystallites of quasi-TiO2. Processing to thin anatase flakes from them is also presented. The colloidal nanosheets were synthesized by soft-chemically exfoliating a layered protonic titanate of <math><mtext>H</mtext><msub><mi></mi><mn>x</mn></msub><mtext>Ti</mtext><msub><mi></mi><mn>2-x/4</mn></msub><mtext>□</mtext><msub><mi></mi><mn><mtext>x</mtext><mtext>/4</mtext></mn></msub><mtext>O</mtext><msub><mi></mi><mn>4</mn></msub><mspace></mspace><mtext>·</mtext><mspace></mspace><mtext>H</mtext><msub><mi></mi><mn>2</mn></msub><mtext>O</mtext></math> (x∼0.7, □: vacancy). The action of bulky quarternary alkylammonium ion in large excess induced osmotic swelling involving Δd>3nm. Lowering the dose of the electrolyte promoted further interlayer expansion leading to delamination into elementary host layers. The resulting nanosheets exhibited a sharp UV-visible absorption band which is considerably blue-shifted compared to bulk TiO2. These distinct features and a well-structured photoluminescence may be interpreted as a reflection of their molecular nature. Slow drying of the colloids brought about spontaneous reassembling of the nanosheets, which was initiated by association of a limited number of the nanosheets with a very large intersheet spacing of >10nm and finally yielded a well-ordered lamellar structure. Freeze-drying of the suspension produced the lamellar phase in an open microstructure which can be converted into thin flaky particulates of anatase tens nanometers thick. The material, an assembly of the flakes, possessed a high specific surface area (40–110m2 <!-->g-1) associated with mesopores.</div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 367-371"},"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)00033-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76765332","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

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

引用次数: 95