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  The chemical desymmetrisation of two- and three-dimensional polyphenylenes as a key step to functional nanoparticles

Grimsdale, A. C., Bauer, R., Weil, T., Tchebotareva, N., Wu, J. S., Watson, M., et al. (2002). The chemical desymmetrisation of two- and three-dimensional polyphenylenes as a key step to functional nanoparticles. Synthesis-Stuttgart, (9 ), 1229-1238.

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 Creators:
Grimsdale, Andrew C.1, Author              
Bauer, R.1, Author              
Weil, T.1, Author              
Tchebotareva, N.1, Author              
Wu, J. S.1, Author              
Watson, Mark1, Author              
Müllen, Klaus1, Author              
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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Free keywords: dendrimers; polycycles; desymmetrisation; Diels-Alder reactions; cycloadditions; dehydrogenations
 Abstract: Desymmetrisation of macromolecules is an important process in the preparation of functional nanoparticles for a variety of potential applications. Efficient routes for the directed stepwise synthesis of desymmetrised functional two- and three- dimensional polyphenylenes are here presented. Building blocks substituted with different functional groups have been prepared and combined to make functionalised hexaphenylbenzenes. Cyclodehydrogenation of these gives unique hexa-peri- hexabenzocoronenes with different types of substituents in various substitution patterns. These show remarkable phase- forming properties, which can be controlled through their substitution patterns, making them attractive candidates for use in electronic aplications. Selective silylation of a tetrahedrally symmetric core molecule followed by stepwise addition of substituted dendrons leads to dendrimers selectively functionalised on the periphery by different functional groups in well-defined spatial relationships to each other. By this method dendrimers have been made with two different chromophores permitting study of energy transfer processes, and dendrimers with functional groups permitting their attachment to electrodes or biological systems with posssible applications as biosensors.

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: eDoc: 28676
ISI: 000176746300015
 Degree: -

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Title: Synthesis-Stuttgart
  Alternative Title : Synthesis
Source Genre: Journal
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Pages: - Volume / Issue: (9 ) Sequence Number: - Start / End Page: 1229 - 1238 Identifier: ISSN: 0039-7881