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Dendritic Ligands for Magnetic Suspensions in Liquid Crystals

Hähsler, Martin; Behrens, Silke

Abstract:
The synthesis of long-chain, aliphatic and space filling dendritic ligands containing (pro)mesogenic, aliphatic or nitrile biphenyl moieties for the stabilization of magnetic nanoparticles in liquid crystal hosts is described. A Negishi or Sonogashira cross-coupling is exploited as a key step in the synthetic sequence. These synthetic procedures enable the synthesis of various ligands which can be easily adapted to different types of liquid crystals [e.g. 4-pentyl-4′-cyanobiphenyl (5CB)]. For instance, a three-step sequence (i.e. etherfication, Sonogashira– Hagihara cross-coupling and Steglich-esterfication) yields a dendritic ligand in 77 % overall yield starting from literature known compounds. The length of the ligand is important to stabilize the magnetic nanoparticles, and, therefore, the length of the ligand may be easily modified by this approach. Indeed, the established synthesis can readily tackle this issue.

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Verlagsausgabe §
DOI: 10.5445/IR/1000104665
Veröffentlicht am 09.01.2020
Originalveröffentlichung
DOI: 10.1002/ejoc.201901450
Scopus
Zitationen: 2
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2019
Sprache Englisch
Identifikator ISSN: 1434-193X
KITopen-ID: 1000104665
HGF-Programm 43.22.02 (POF III, LK 01) Nanocatalysis
Erschienen in European journal of organic chemistry
Verlag John Wiley and Sons
Band 2019
Heft 48
Seiten 7820–7830
Vorab online veröffentlicht am 28.11.2019
Nachgewiesen in Dimensions
Web of Science
Scopus
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