Photoreaktionen von <i>N</i>‐(1‐Pyridinio)amidaten in Monoschichten und Liposomen

Haubs, Michael; Ringsdorf, Helmut

doi:10.1002/ange.19850971030

Cited by 18 publications

(20 citation statements)

References 11 publications

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“…The most common isomerizable photosurfactants contain azobenzene or stilbene groups; the chromophore can be in the hydrophobic chain [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] or in the head group. 3,[18][19][20] As first suggested by Shinkai, 3 incorporation of an azobenzene group into the hydrophobic chains is expected to affect the hydrophilic-lipophilic balance through light-driven isomerizations. A series of surfactants were synthesised and used to demonstrate proof-of-principle: 3 micelle formation was shown to be affected by light.…”

Section: Cis-trans Isomerizationsmentioning

confidence: 92%

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Self-assembly of light-sensitive surfactants

2005

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Section: Cis-trans Isomerizationsmentioning

confidence: 92%

“…Several triggers have been employed to induce changes in aggregation: pH, [43][44][45] electrochemical potential, [46][47][48] temperature, 49,50 addition of electrolytes 51,52 and light. 1,9,11,18,19,32,[53][54][55][56][57][58]…”

Section: Aggregation Propertiesmentioning

confidence: 99%

Self-assembly of light-sensitive surfactants

2005

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“…As such, the liposome formed by such amphiphiles was deformed significantly. [29,30] It should be pointed out that this line of research provides a series of photodegradative surfactants for application in soft lithography and separation technology. [31,32] In addition, some other photocleavable groups have also been well explored for photoresponsive surfactants.…”

Section: Photoirradiated Irreversible Methodsmentioning

confidence: 99%

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

2009

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Amphiphilicity is one of the molecular bases for self‐assembly. By tuning the amphiphilicity of building blocks, controllable self‐assembly can be realized. This article reviews different routes for tuning amphiphilicity and discusses different possibilities for self‐assembly and disassembly in a controlled manner. In general, this includes irreversible and reversible routes. The irreversible routes concern irreversible reactions taking place on the building blocks and changing their molecular amphiphilicity. The building blocks are then able to self‐assemble to form different supramolecular structures, but cannot remain stable upon loss of amphiphilicity. Compared to the irreversible routes, the reversible routes are more attractive due to the good control over the assembly and disassembly of the supramolecular structure formed via tuning of the amphiphilicity. These routes involve reversible chemical reactions and supramolecular approaches, and different external stimuli can be used to trigger reversible changes of amphiphilicity, including light, redox, pH, and enzymes. It is anticipated that this line of research can lead to the fabrication of new functional supramolecular assemblies and materials.

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“…Photochemical reaction of N-( I-pyridini0)amidate head groups forming diazepines in liposomal membranes: reduction of the head-group hydrophilicity[95].…”

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confidence: 99%

Molecular Architecture and Function of Polymeric Oriented Systems: Models for the Study of Organization, Surface Recognition, and Dynamics of Biomembranes

Ringsdorf

Schlarb

Venzmer

1988

Angew. Chem. Int. Ed. Engl.

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1,471

822

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Angew. Cliern. I n [ . Ed. Engl. 27(1988) 113-158 0 VCH Verlagsgesellschaft rnbH, 0-6940 Weinheim. 1988 The Part and the Whole. The principle of self-organization for the creation of functional units is not an invention of modern natural sciences. It was already a basic idea of the ancient philosophies in Asia and Europe: only the mutuality of the parts creates the whole and its ability to function. Translated into the language of chemistry this means: the selforganization of molecules leads to supramolecular systems and is responsible for their functions. Thermotropic and lyotropic liquid crystals are such functional units, formed by selforganization. As highly oriented systems, they exhibit new properties. The importance of lyotropic liquid crystals for the life sciences has been known for a long time. They are a prerequisite for the development of life and the ability of cells to function. In materials science this concept offunction through organization led to the development of new liquidcrystalline materials. From the point of view of macromolecular chemistry, this review tries to combine these two different fields and especially hopes to stimulate their interaction and joint treatment. To exemplify this, the molecular architecture of polymeric organized systems will be discussed. Polymeric liquid crystals combine the ability to undergo spontaneous self-organization-typical of liquid-crystalline phases-with the polymer-specific property of stabilizing these ordered states. As new materials, polymeric liquid crystals have already been investigated intensively. As model systems for biomembranes as well as for the simulation of biomembrane processes, they so far have been little discussed. The intention of this review article is to show that polymer science is able to contribute to the simulation of cellular processes such as the stabilization of biomembranes, specific surface recognition, or even the "uncorking" of cells. Polymer science, having an old tradition as an interdisciplinary field, can no longer restrict itself to common plastics. Attempts to reach new horizons have already begun. The borderland between liquid crystals and cells will certainly play an important role. Basic requirements to work in this frontier area between organic chemistry, membrane biology, life science, and materials science will be the delight in scientific adventures as well as the courage to go ahead. The most important prerequisite will be the willingness to cooperate with disciplines which so far have not really accepted each other. From this point of view, this review does not aim at giving defined answers. It wants instead to encourage the scientific venture: too often we cling to painfully acquired knowledge, fearing adventures.To the question of what he was up to at the moment, Mr. K . answered: "I'm hard at work preparing my next error" Bertolt Brecht"][*] Prof.

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Photoreaktionen von N‐(1‐Pyridinio)amidaten in Monoschichten und Liposomen

Cited by 18 publications

References 11 publications

Self-assembly of light-sensitive surfactants

Self-assembly of light-sensitive surfactants

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

Molecular Architecture and Function of Polymeric Oriented Systems: Models for the Study of Organization, Surface Recognition, and Dynamics of Biomembranes

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