Change search
ReferencesLink to record
Permanent link

Direct link
Anisotropic Ion Mobility in an Ionic Liquid Crystal Complex of a Rodlike Mesogen Containing an Oxyethylene Moiety and Lithium Triflate
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry (closed 20110630). KTH, School of Chemical Science and Engineering (CHE), Centres, Industrial NMR Centre.
Show others and affiliations
(English)Manuscript (preprint) (Other academic)
Abstract [en]

A liquid-crystalline (LC) complex of a rodlike mesogen containing an oxyethylene moiety and lithium triflate has been synthesized and its mesophases have been characterized by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and polarized optical microscopy (POM). The ion conductive behaviour was investigated in isotropic and LC phases and related to the ionic mobility, as observed by 7Li and 19F NMR diffusometry. The observed two-dimensional ion mobilities show that planes conducting both lithium and triflate ions are formed in the smectic mesophases. The conductivity of the lithium ions is large in the smectic C phase where conductive planes rich in ethylene oxide chains exist.

URN: urn:nbn:se:kth:diva-30473OAI: diva2:400364

QC 20110225

Available from: 2011-02-25 Created: 2011-02-25 Last updated: 2014-09-24Bibliographically approved
In thesis
1. Nano-segregated soft materials observed by NMR spectroscopy
Open this publication in new window or tab >>Nano-segregated soft materials observed by NMR spectroscopy
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis is about using nuclear magnetic resonance (NMR) spectroscopy for studying soft materials. Soft materials may be encountered everyday by most readers of this thesis, for example when taking a shower or watching TV. The usefulness of these materials originates from them being soft yet, at the same time, having some kind of a structure. The characteristic length scale of those structures is often on the order of nanometers (10-9 m) and the structure can respond to various external stimuli such as temperature, electric and magnetic fields, or the presence of interfaces.

NMR spectroscopy excels when studying soft materials because it is a non-invasive technique with a large spectral resolution. Moreover, different NMR methods allow us to study local molecular dynamics or longer-range translational diffusion. Understanding those latter aspects is very important for the development of dynamic and responsive materials.

Papers I-III present our work on assessing molecular adsorption on interfaces in colloidal dispersions. Here, carbon nanotubes (CNTs) or silica particles were the colloidal substrates to which proteins, polymers or surfactants adsorbed. Papers IV-VI concern ionic mobility in liquid crystals (LCs). The influence of material structure on, for example, the anisotropy of diffusion or on the association/dissociation of ions was studied in several LC phases.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2011. 46 p.
Trita-CHE-Report, ISSN 1654-1081 ; 2011:12
nuclear magnetic resonance, soft matter, colloidal dispersion, carbon nanotubes, colloidal silica, adsorption, liquid crystals, ionic liquids, diffusion
National Category
Physical Chemistry
urn:nbn:se:kth:diva-30337 (URN)978-91-7415-876-2 (ISBN)
Public defence
2011-03-18, Sal F3, Lindstedtsvägen 26, KTH, Stockholm, 09:30 (English)
QC 20110225Available from: 2011-02-25 Created: 2011-02-23 Last updated: 2011-02-25Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Frise, AntonDvinskikh, Sergey V.Furó, István
By organisation
Physical Chemistry (closed 20110630)Industrial NMR Centre

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 52 hits
ReferencesLink to record
Permanent link

Direct link