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Your search keyword '"organogels"' showing total 2 results
Start Over Descriptor "organogels" Language dutch; flemish
2 results on '"organogels"'

1. Remarkable polymorphism in gels of new azobenzene bis-urea gelators

Author

J. H van Esch, S. van der Laan, Bernard Feringa, Rm Kellogg, Synthetische Organische Chemie, Faculty of Science and Engineering, Stratingh Institute of Chemistry, and Moleculaire Anorganische Chemie

Subjects
ORGANIC-SOLVENTS, ORGANOGELS, DERIVATIVES, Surfaces and Interfaces, AGGREGATE, SWITCHES, Condensed Matter Physics, NANOSTRUCTURES, GELATION, Solvent, chemistry.chemical_compound, Azobenzene, chemistry, Polymorphism (materials science), Synthetic Receptors, LIQUIDS, Electrochemistry, Urea, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Organic chemistry, SYNTHETIC RECEPTORS, General Materials Science, STILBENE, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Spectroscopy
Abstract

Azobenzenes substituted with two urea groups, and especially the 2,2‘-disubstituted azobenzenes, form thermoreversible gels with a wide range of organic solvents at concentrations which are in some cases even as low as 0.2 mM. Most remarkably, the 2,2‘-disubstituted azobenzene gelator can form two different morphs, which is governed by the properties of the solvent and kinetic factors.

Published
2002

2. Efficient intermolecular charge transport in self-assembled fibers of mono- and bithiophene bisurea compounds

Author

Bas R. Wegewijs, Matthijs P. de Haas, Ben L. Feringa, Diederik B. A. Rep, Richard M. Kellogg, Franck S. Schoonbeek, Jan H. van Esch, Teun M. Klapwijk, Faculty of Science and Engineering, Synthetische Organische Chemie, Stratingh Institute of Chemistry, and Moleculaire Anorganische Chemie

Subjects
Materials science, GELATORS, Supramolecular chemistry, Photochemistry, conducting materials, Catalysis, supramolecular chemistry, Self assembled, Microwave conductivity, chemistry.chemical_compound, Polymer chemistry, ORGANIC TRANSISTORS, SOLVENTS, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), ORGANOGELS, Hydrogen bond, Intermolecular force, Charge (physics), General Chemistry, microwave conductivity, gels, LIGHT, chemistry, MOBILITY, Urea, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Charge carrier, COMPLEXES, UREA, CONJUGATED POLYMERS
Abstract

Hydrogen bonds between urea units allow self-organization of π systems in mono- and bithiophenes into fibers as shown schematically. In these fibers there is a surprisingly high mobility of charge carriers as determined by pulse-radiolysis time-resolved microwave conductivity measurements.

Published
1999

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