Objectif
This is a joint research project of three groups sharing the common long-term scientific goal of studying the chemical and physical properties of ionic systems forming liquid crystals. It is well known that liquid crystals (mesophases) are usually formed by organic substances and systems of non-electrolytes. This project aims at developing the less-known area of mesophase-forming electrolytes.
The specific short-term aims of the project are: the determination of the temperatures concentration range of the mesophase existence in binary alkanoate systems with common anion or cation. The considered systems may have two, or one, or no mesogenic components. The anions will be propanoate, linear and isobutanoate, linear and isopentanoate, decanoate. The cations will be the alakali and alkali-earth metals, and thallium. Systems of one salt with corresponding acid, thermodynamic and mesogenic properties of homologous series of some alkanoates of divalent metals, such as those of Ba, Cu, Zn, and classification phase diagrams for ionic mesogenic systems according to their main types, will also be studied.
The research group in Kiev, which will include four full-time researchers per year, will carry out measurements of the binary systems of mono- and divalent metal alkanoates with linear and branched short aliphatic chains with the following techniques: differential thermal analysis, polarisation microscopy, small angle X-ray scattering analysis, X-ray diffraction, NMR spectroscopy, conductivity. The team in Pavia will collaborate in this work by collecting dielectric, microscopic and calorimetric data on some of the mixtures considered in these systems, and by studying the thermophysical and mesogenic properties of pure divalent metal alkanoates.
The group at the Complutense University in Madrid, composed of two full-time researchers, will study: the formation of liquid crystals in the phase diagram thallium n.decanoate - n.decanoic acid, and in similar systems with homologous alkanoates, and the thermal behaviour of some copper caboxylates which can form liquid crystal phases. The collaboration previously undertaken with the team in Pavia will continue and will involve, in particular, student exchanges and visits of post-doctoral fellows.
The group in Pavia, besides dealing with the co-ordination of the project, will study the thermophysical properties of some lithium carboxylates which are components of the phase diagrams studied in Kiev. They will also carry out dielectric and calorimetric measurements on the systems and substances prepared in Kiev and on the above-mentioned phase diagram and the copper alkanoates prepared and studied in Madrid.
Thème(s)
Appel à propositions
Data not availableRégime de financement
Data not availableCoordinateur
27100 Pavia
Italie