| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Godinho, Mh
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2023Study of the mesomorphic properties and conductivity of n-alkyl-2-picolinium ionic liquid crystalscitations
- 2022Synthesis and characterisation of ionic liquid crystals based on substituted pyridinium cationscitations
- 2017Hybrid polysaccharide-based systems for biomedical applicationscitations
- 2015Functional materials from liquid crystalline cellulose derivatives: Synthetic routes, characterization and applicationscitations
- 2014Cellulose‐Based Liquid Crystalline Composite Systemscitations
- 2014Nanocrystalline cellulose applied simultaneously as the gate dielectric and the substrate in flexible field effect transistorscitations
- 2013Cellulose Perversionscitations
- 2011All-Cellulosic Based Composites
- 2010Shear-induced lamellar ionic liquid-crystal foamcitations
- 2009Deformation of isotropic and anisotropic liquid droplets dispersed in a cellulose liquid crystalline derivativecitations
- 2002Anisotropic hydroxypropylcellulose films as alignment layers of a bistable ferroelectric devicecitations
- 2002Dielectric studies of the nematic mixture E7 on a hdroxypropylcellulose substratecitations
- 2001Cellulose-based composite filmscitations
Places of action
| Organizations | Location | People |
|---|
article
Synthesis and characterisation of ionic liquid crystals based on substituted pyridinium cations
Abstract
<p>Novel ionic liquid crystals based on pyridinium and methylpyridinium cations with a dodecyl chain and bromide as anion have been prepared and characterised. [C<sub>12</sub>Pyr][Br] and [C<sub>12</sub>-n-Pic][Br] (n = 2, 3 or 4) were studied in order to understand the influence of the methyl group position in the mesomorphic behaviour. Neat microwave-assisted reactions were carried out to synthesised [C<sub>12</sub>Pyr][Br], [C<sub>12</sub>-3-Pic][Br] and [C<sub>12</sub>-4-Pic][Br] as a sustainable approach, leading to significantly reduced reaction times (35 min vs. 48 h in conventional method). All prepared compounds were characterised by spectroscopic techniques (<sup>1</sup>H and <sup>13</sup>C-NMR; ATR-FTIR), Elemental Analysis, Differential Scanning Calorimetry (DSC), Polarised Optical Microscopy (POM) and X-Ray Powder Diffraction (XRD). It was observed that the presence of water highly influences the phase transformations. Nevertheless, thermotropic smectic phases were detected for all materials with a layer spacing between 20 and 35 Å, compatible with a bilayer interdigitated or tilted lamellar arrangement of the cation’s alkyl chain. This work also indicates new routes for preparing ionic liquid crystals with various functionalities ruled by the synthesis design.</p>