Zwitterionic pyridinium derivatives of [closo-1-CB_9H_10]− and [closo-1-CB_11H_12]− as high Δε additives to a nematic host

Pecyna, Jacek; Pociecha, Damian; Kaszynski, Piotr

dc.contributor.author	Pecyna, Jacek
dc.contributor.author	Pociecha, Damian
dc.contributor.author	Kaszynski, Piotr
dc.date.accessioned	2016-03-31T09:19:59Z
dc.date.available	2016-03-31T09:19:59Z
dc.date.issued	2013
dc.identifier.uri	http://hdl.handle.net/11089/17589
dc.description.abstract	Substituted closo-carbaborate–pyridinium zwitterions were prepared in 35–50% yield by reacting 1-amino-closo-1-carbaborates with 4-alkoxypyrylium triflates. Two of the new materials, 1[6]d and 2[10]b, exhibit a high temperature SmA phase, whose stability is driven by dipolar interactions. Solution studies in a nematic host, ClEster, demonstrated high positive dielectric anisotropy of these new compounds (Δε ≈ +50) resulting from a longitudinal molecular dipole moment of about 20 D.	pl_PL
dc.description.sponsorship	This work was supported by the NSF grant DMR-1207585. We are grateful to Professor Roman Dąbrowski of Military University of Technology (Warsaw, Poland) for the gift of ClEster. We thank Ms. Amanda Doody for help with chiral HPLC analysis of 1[6]c.	pl_PL
dc.language.iso	en	pl_PL
dc.publisher	Royal Society of Chemistry	pl_PL
dc.relation.ispartofseries	Journal of Materials Chemistry C;9
dc.rights	Uznanie autorstwa 3.0 Polska	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/pl/	*
dc.title	Zwitterionic pyridinium derivatives of [closo-1-CB_9H_10]− and [closo-1-CB_11H_12]− as high Δε additives to a nematic host	pl_PL
dc.type	Article	pl_PL
dc.page.number	1585-1591	pl_PL
dc.contributor.authorAffiliation	Vanderbilt University, Department of Chemistry	pl_PL
dc.contributor.authorAffiliation	University of Warsaw, Department of Chemistry	pl_PL
dc.contributor.authorAffiliation	University of Łódź, Faculty of Chemistry	pl_PL
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dc.contributor.authorEmail	piotr.kaszynski@vanderbilt.edu	pl_PL
dc.identifier.doi	10.1039/C3TC32351J
dc.date.defence	2014
dc.relation.volume	2	pl_PL

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