Journal of Japan Oil Chemists Society最新文献_第10页

Photoinduced Electrochemical Properties of Organized Assembly of Amphiphilic Redox Polymers by Langmuir-Blodgett Technique Langmuir-Blodgett技术研究两亲性氧化还原聚合物有序组装的光致电化学性质

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1217

A. Aoki, T. Miyashita

{"title":"Photoinduced Electrochemical Properties of Organized Assembly of Amphiphilic Redox Polymers by Langmuir-Blodgett Technique","authors":"A. Aoki, T. Miyashita","doi":"10.5650/JOS1996.49.1217","DOIUrl":"https://doi.org/10.5650/JOS1996.49.1217","url":null,"abstract":"Spatial arrangement of the ruthenium dipyridyl complex and ferrocene derivative in hetero-deposited redox polymer Langmuir-Blodgett (LB) films was carried out for direction control of photocurrent flow produced by photoinduced electron transfer reaction and for high quantum efficiency. Two hetero-deposited structures were obtained by varying the deposition order of the redox polymer monolayers by the LB technique. Cyclic voltammograms of hetero-deposited redox polymer LB films exhibited current rectifying and charge storage properties. Light irradiation led to anodic photocurrent of hetero-deposited redox polymer LB films consisting of Ru copolymer LB film as an inner layer and Fc copolymer LB film as an outer layer on the ITO (Fc/Ru/ITO) electrodes. On the other hand, cathodic current was observed at the reverse layered structure (Ru/Fc/ITO) electrodes. The direction of photocurrent flow depended on the deposition order of redox polymer LB films on the ITO electrode. Photocurrent quantum efficiency of 5.9% of the hetero-deposited redox polymer LB film was achieved. High photocurrent conversion efficiency is explained by inhibition of recombination of photoinduced charge separation due to hetero-deposited LB film structures.","PeriodicalId":16191,"journal":{"name":"Journal of Japan Oil Chemists Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74610870","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

Surface Force Measurement and Characterization of Functionalized Molecular Assemblies 功能化分子组装的表面力测量和表征

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1191

K. Kurihara, Y. Nakai

{"title":"Surface Force Measurement and Characterization of Functionalized Molecular Assemblies","authors":"K. Kurihara, Y. Nakai","doi":"10.5650/JOS1996.49.1191","DOIUrl":"https://doi.org/10.5650/JOS1996.49.1191","url":null,"abstract":"This article reviews applications of surface forces measurement for characterizing interactions of molecular assemblies with overview given in Table 1. Measurement techniques using a surface force apparatus and a colloidal probe atomic force microscope described in a concise manner, and the results of detailed researches on functionalized surfactant assemblies are presented. 1) Surface forces measurement provided evidence for spontaneous vesicle formation of an ammonium surfactant with an acetate counterion. 2) The mechanism of fusion and aggregation of surfactant vesicles in the presence of salt (NaCl) was clarified. 3) Interactions between bilayers of various biological phospholipids were found to be attractive van der Waals and repulsive steric hydration forces in pure water and monovalent salt solutions. 4) Hydrogen-bonding interactions between glycine head groups were directly demonstrated. 5) Interactions between LB films of metal-chelating lipids ; pH dependence reflected different protonation states of iminodiacetic acid groups, and Cu2+ complexation with them. 6) The effects of surfactant on the particle bubble interactions between hydrophilic and hydrophobic silica particles and an air bubble were examined .","PeriodicalId":16191,"journal":{"name":"Journal of Japan Oil Chemists Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80206561","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

Novel Optical Functions of Compounds Derived from Cholesterol 胆固醇衍生化合物的新光学功能

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1041

N. Tamaoki

引用次数: 0

Correlation of HLB with Self-Organized Structure HLB与自组织结构的相关性

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1123

H. Kunieda, K. Aramaki

引用次数: 0

Supramolecular Structures of Functionality Vesicles 功能性囊泡的超分子结构

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1107

T. Horiuchi, K. Tajima

引用次数: 3

Novel Fluorinated Oligo-Surfactants Imparted by the Aggregation of Fluoroalkyl Segments 新型氟化低聚表面活性剂由氟烷基段聚集而成

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1021

H. Sawada, T. Kawase

{"title":"Novel Fluorinated Oligo-Surfactants Imparted by the Aggregation of Fluoroalkyl Segments","authors":"H. Sawada, T. Kawase","doi":"10.5650/JOS1996.49.1021","DOIUrl":"https://doi.org/10.5650/JOS1996.49.1021","url":null,"abstract":"Fluoroalkanoyl peroxide was found useful for the synthesis of fluoroalkyl end-capped oligomers having COOH, SO3H, O=C-NR1R2, OH, betaine segments, phosphorous segments and blocked-isocyanato segments. The fluoroalkyl end-capped oligomers were generally soluble not only in water but common organic solvents as well. These oligomers were highly surface active, showing very low surface tensions and clear break points, as in the case of low molecular weight fluorinated surfactants. Self-organization thus occurs to form molecular aggregates. Based on light scattering studies, fluoroalkyl end-capped oligomers having COOH formed ellipsoidal micelles. Fluoroalkyl end-capped oligomers with hydroxy or betaine segments gave rise to gelation owing to hydrophobic interaction of end-capped fluoroalkyl segments in addition to the hydrogen bonding and/or the ionic interaction of betaine segments. Moreover, as some examples of interesting properties of fluoroalkyl end-capped acrylamide type oligomers, the unique binding power of Ca2+ or Cr3+, selective recognition of organic color material having -NH2 or -NMe2 groups such as methylene blue and/or luminol, and the immobilization of cytochrome c are discussed. These features may be due to molecular aggregates produced by the interaction between end-capped fluoroalkyls.","PeriodicalId":16191,"journal":{"name":"Journal of Japan Oil Chemists Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87102296","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

Two-Dimensional Highly Ordered Molecular Layers Prepared by Adsorption-Induced Self-Organization 吸附诱导自组织制备二维高有序分子层

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1225

M. Kunitake

引用次数: 0

Sugar-based Surfactants 糖基表面活性剂

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1035

K. Fukada

引用次数: 27

Interaction of Liposomes with Detergents 脂质体与洗涤剂的相互作用

Journal of Japan Oil Chemists Society Pub Date : 2000-10-20 DOI: 10.5650/JOS1996.49.1131

M. Ueno, H. Kashiwagi

引用次数: 3

Binary Mixed Systems of Anionic/Nonionic Surfactants 阴离子/非离子表面活性剂二元混合体系

Journal of Japan Oil Chemists Society Pub Date : 2000-09-20 DOI: 10.5650/JOS1996.49.915

T. Okano, Y. Abe, Daisuke Hotta, T. Nakano, G. Sugihara, Seong-Geun Oh

{"title":"Binary Mixed Systems of Anionic/Nonionic Surfactants","authors":"T. Okano, Y. Abe, Daisuke Hotta, T. Nakano, G. Sugihara, Seong-Geun Oh","doi":"10.5650/JOS1996.49.915","DOIUrl":"https://doi.org/10.5650/JOS1996.49.915","url":null,"abstract":"Micelle formation in water and adsorbed film formation at air/water interface were studied by surface tension measurement for two mixed surfactant systems : combinations of sodium salts of α-sulfonatomyristic acid methyl ester (α-SMy·Me) and the propyl ester (α-SMy·Pr) with n-decanoyl-N-methyl glucamide (MEGA-10). The α-SMy·Pr/MEGA-10 and the α-SMy·Me/MEGA-10 mixed systems were found to synergistically enhance surface activity and form well-mixed micelles with the aid of strong interaction between head groups. Critical micellization concentration (CMC) as a function of mole fraction of MEGA-10 in the surfactant mixture (XMEGA-10) for both mixed systems was noted to deviate negatively from ideal mixing. Micellar phase (CMC vs YMEGA-10 relation) curves were simulated through use of the interaction parameter, ωR=-2.1 for α-SMy·Me/MEGA-10 and ωR=-2.0 for α-SMy·Pr/MEGA-10 and indicated the presence of azeotropes. Based on equations for estimating composition (Zi) and the interaction parameter (ωA) in adsorbed film equilibrated with monomers in bulk solution, phase diagrams were constructed that included the two relations of CMC vs XMEGA-10 and CMC vs ZMEGA-10. Adsorbed film of the respective mixed systems was formed through stronger interactions between anionic and nonionic surfactants compared to those of mixed micelles (-ωA>-ωR). The diagrams demonstrated that composition in micelles (Yi) differs from that in the adsorbed film (Zi). From the slope of surface tension (γ) vs logarithmic molality (ln mt) curve, just below CMC, surface excess (Γ) was determined and mean molecular area (Am) was computed as a function of XMEGA-10 or ZMEGA-10. From Am data, partial molecular area (PMA) of each component was determined as a function of ZMEGA-10; a large deviation from ideal mixing (the additivity rule) was observed for the respective mixed systems. Effects of differences in head group moiety, i.e., either methyl or propyl, were clearly evident with respect to hydrophobicity difference, but physicochemical behavior appeared essentially the same.","PeriodicalId":16191,"journal":{"name":"Journal of Japan Oil Chemists Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2000-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84877635","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: 11