Temperature‐Induced Micelle to Vesicle Transition in the Sodium Dodecylsulfate/Dodecyltriethylammonium Bromide System

Yin, Hongxi; Zhou, Zukang; Huang, Jianbin; Zheng, Rong; Zhang, Yongyi

doi:10.1002/ange.200350913

Cited by 32 publications

(20 citation statements)

References 29 publications

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“…In the case of particles in a solvent, the analysis of the time-dependent scattered intensity provides a measure of the diffusion coefficient, and consequently of the hydrodynamic size of the particles, and information about the formation of various types of aggregates. [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57] Nowadays, it is also a very common tool to determine particle size. [58,59] Most of the studies were, however, performed in aqueous media and only a few papers reported measurements performed in organic solvents.…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembly of ZnO Nanocrystals in Colloidal Solutions

et al. 2009

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The self-organization in solution of ZnO nanocrystals into superlattices is monitored by dynamic light scattering. When long-alkyl-chain amines or carboxylic acids are used as stabilizing ligands, no organization is observed. In contrast, when binary mixtures of long-alkyl-chain amines and carboxylic acids are used, the presence of a thermodynamic equilibrium between free and organized ZnO nanoparticles is detected in THF or toluene. The superlattices of organized ZnO nanoparticles are independently observed by TEM and SEM. The coordination mode of the ligands at the surface of the ZnO nanoparticles is evidenced by NMR studies. The presence of ion-paired ammonium carboxylate surrounding the surface of ZnO nanoparticles appears to be a necessary requirement to govern this reversible organization. This is substantiated by the absence of organization of ZnO nanoparticles when either a solvent of high dielectric constant, such as acetone, or a strong hydrogen-bond acceptor is used.

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Section: Resultsmentioning

confidence: 99%

Self‐Assembly of ZnO Nanocrystals in Colloidal Solutions

et al. 2009

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“…For conventional amphiphiles, [26] such as ionic surfactants, the temperature sensitive vesicle-to-micelle transitions are attributed to the increasing solubility of the counterion upon increasing the temperature. For nonionic surfactants, temperature-induced micelle-to-vesicle transitions are well known, which is attributed to a decrease in head-group hydration upon increasing the temperature.…”

mentioning

confidence: 99%

Temperature‐Controlled Supramolecular Vesicles Modulated by p‐Sulfonatocalix[5]arene with Pyrene

Wang

Guo

Liu

2010

Chemistry A European J

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Construction of vesicles is a significant topic of research in the fields of chemistry, biology, and materials science for their various applications.[1] Recently, more and more research has been focused on "supramolecular amphiphiles", which have emerged as a smart strategy due to their simplicity, versatility, and especially reversibility. Several kinds of noncovalent interactions have been used to tune the molecular amphiphilicity and self-assembled nanostructures, [2] including hydrogen-bonding, [3] charge-transfer, [4] and p···p interactions, [5] among others.[6] The noncovalent interactions often employed (e.g., hydrogen bonding, coordination, and p stacking) are not always effective for designing supramolecular architectures in aqueous medium, and hence, they lack the necessary biocompatibility for applications in the fields of biotechnology. Macrocyclic receptors, such as cyclodextrins, calixarenes, and cucurbiturils, exhibit particular advantages in building water-soluble supramolecular architectures, [7] more significantly, the three macrocyclic species are all friendly to organisms. [8] To the best of our knowledge, supramolecular vesicles formed by host-guest interactions between macrocyclic hosts and guests have been explored less frequently.[9] Kim et al. reported, for the first time, the spontaneous formation of vesicles triggered by the formation of a stable ternary inclusion complex that behaves as a large supramolecular amphiphile, in which cucurbituril was employed.[9a] Cyclodextrin is the macrocyclic host used most frequently in building organized amphiphiles, and the first noncovalent vesicle based on a cyclodextrin complex was reported by Chen and co-workers in 2007.[9b]Calixarenes, [10] composed of phenolic units linked by methylene groups, represent a particularly significant class of the host molecules in supramolecular chemistry. Their intrinsic cone shape is the prerequisite for high-curvature aggregations of amphiphiles. [11,12] Their relatively rigid framework can enhance the stability of amphiphilic aggregation.[13] Consequently, calixarenes have received certain attention in constructing micellar and vesicular aggregations. The vesicles reported are uniformly formed by a covalent approach that modifies calixarenes into amphiphiles by the linkage of lipophilic groups at one rim and hydrophilic groups at the other rim, [12][13][14][15] whereas no supramolecular vesicles based on host-guest complexation have been explored. Recently, García-Río and Basilio found that the complexation of water-soluble calix [6]arene can tune the amphiphilicity of a cationic surfactant.[16] Blanzat et al. reported the spontaneous formation of vesicles by combining an aminocalix[6]arene with sugar-based surfactants using an acid-base reaction to obtain a catanionic association while this manuscript was under preparation.[17] Our particular interest herein is to fabricate calixarene-based supramolecular vesicles through host-guest complexation. The most fascinating aspect of supramolecular chemistry is th...

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“…B. Temperatur, [45] Konzentration, [46] der Zusammensetzung des Lçsungsmittels, [47] der molekularen Struktur und Form der Bausteine, [14a, 30] sterischen Wechselwirkungen einzelner Molekülteile und der Anwesenheit bestimmter Additive, [48] sowie vom relativen Verhältnis von hydrophoben und hydrophilen Molekülteilen. Die Bildung unterschiedlicher Aggregatformen sowie deren Grçße hängt von zahlreichen Faktoren ab, wie z.…”

Section: Perylenbisimidverbände In Wasserunclassified

“…[43] Das mit Dendronen der ersten Generation versehene Bolaamphiphil zeigt dabei wiederum die typischen Merkmale aggregierter PBIs, ein breites Absorptionsspektrum mit hypsochrom verschobenem Absorptionsmaximum und schwache Fluoreszenz. Beim symmetrischen PBI mit den Dendronsubstituenten der zweiten Generation (13) [45] Konzentration, [46] der Zusammensetzung des Lçsungsmittels, [47] der molekularen Struktur und Form der Bausteine, [14a, 30] sterischen Wechselwirkungen einzelner Molekülteile und der Anwesenheit bestimmter Additive, [48] sowie vom relativen Verhältnis von hydrophoben und hydrophilen Molekülteilen. [9,49] [53] Des Weiteren fand dieses positiv geladene PBI durch elektrostatische Selbstorganisation mit negativ geladenen Polyelektrolyten in Dünnschichten Anwendung.…”

Section: Perylenbisimidverbände In Wasserunclassified

Molekülverbände von Perylenbisimid‐Farbstoffen in Wasser

2012

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Perylenbisimide zählen zu den bedeutendsten funktionellen Farbstoffen mit vielfältigen Anwendungsmöglichkeiten. Aufgrund ihrer chemischen Robustheit, Photostabilität und herausragenden optischen und elektronischen Eigenschaften wurden sie als Pigmentfarbstoffe, Fluoreszenzsonden sowie n‐Halbleiter in der organischen Elektronik und Photovoltaik eingesetzt. Das ausgedehnte quadrupolare π‐System dieser Farbstoffklasse ermöglichte außerdem die Herstellung zahlreicher supramolekularer Architekturen mit faszinierenden photophysikalischen Eigenschaften. Jedoch blieb der supramolekulare Ansatz zur Bildung von Perylenbisimid‐Molekülverbänden größtenteils organischen Medien vorbehalten. Erfreulicherweise gab es in den letzten Jahren beachtliche Bemühungen zur Entwicklung von wasserlöslichen Perylenbisimiden und deren Anwendungen in wässrigen Medien. Dieser Aufsatz gibt einen aktuellen Überblick über die Selbstorganisation von Perylenbisimiden durch π‐π‐Wechselwirkung im wässrigen Medium. Synthetische Strategien zur Herstellung von wasserlöslichen Perylenbisimiden und der Einfluss des Wassers auf die π‐π‐Stapelung von Perylenbisimiden, sowie daraus resultierende Anwendungen werden eingehend diskutiert.

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Temperature‐Induced Micelle to Vesicle Transition in the Sodium Dodecylsulfate/Dodecyltriethylammonium Bromide System

Cited by 32 publications

References 29 publications

Self‐Assembly of ZnO Nanocrystals in Colloidal Solutions

Self‐Assembly of ZnO Nanocrystals in Colloidal Solutions

Temperature‐Controlled Supramolecular Vesicles Modulated by p‐Sulfonatocalix[5]arene with Pyrene

Molekülverbände von Perylenbisimid‐Farbstoffen in Wasser

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