Lyotropic mesomorphism of rare-earth trisalkylsulphates in the water-ethylene glycol system

Galyametdinov, Yu. G.; Jervis, Helen B.; Bruce, Duncan W.; Binnemans, Koen

doi:10.1080/02678290110093219

Cited by 15 publications

(11 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite increased interest in lyotropic metallomesogens, there is rather limited number of studies dedicated to lanthanidecontaining lyotropic phases. [24][25][26][27][28] The present study continues our research on the synthesis and characterization of lanthanidecontaining lyotropic liquid crystals based on oxyethylated surfactants. This work is aimed at finding a correlation between the molecular structure of amphiphilic molecules and supramolecular organization in the mesophases containing a lanthanide ion.…”

Section: Introductionmentioning

confidence: 58%

Lyotropic La-containing lamellar liquid crystals: phase behaviour, thermal and structural properties

et al. 2015

View full text Add to dashboard Cite

This paper provides the results of POM, DSC and XRPD methods characterizing the liquid crystalline behaviour, thermal properties and structural parameters of lyotropic systems based on a nonionic surfactant and lanthanum nitrate (La(3+)). The systems based on tetraethylene glycol monododecyl ether (C12EO4) and lanthanum nitrate have been demonstrated to form a lamellar phase. The concentration and temperature ranges of the existence of mesophases as well as thermodynamic parameters of phase transitions have been estimated. The structural parameters of the lamellar phase of the C12EO4/La(3+)/water systems have been determined using X-ray diffraction. The model of molecular packing in lamellar lanthanide-containing lyotropic mesophases was proposed for the observed patterns of structural parameters obtained at various water contents. NMR (1)H with a pulsed magnetic field gradient has been used to characterize molecular motions in the C12EO4/La(3+)/H2O systems with different water contents.

show abstract

Section: Introductionmentioning

confidence: 58%

Lyotropic La-containing lamellar liquid crystals: phase behaviour, thermal and structural properties

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Lyotropic mesophases were observed for lanthanide trisdodecyl sulfates, Ln(C 12 H 25 SO 4 ) 3 (Ln ) Y, La, Ce-Lu, except Pm) in the presence of ethylene glycol or water (or mixtures thereof) as the solvent. 186 In ethylene glycol, a normal hexagonal phase and a cubic phase could be detected, whereas in water a normal hexagonal phase and a lamellar phase were found. By changing the solvent, it is thus possible to obtain different supramolecular organizations within a series of lanthanide-containing metallomesogens.The catalytic properties of these compounds are discussed in section V.D.…”

Section: A Surfactants As Counter Anions For Lanthanide-(iii) Cationsmentioning

confidence: 96%

Lanthanide-Containing Liquid Crystals and Surfactants

2002

Self Cite

View full text Add to dashboard Cite

Christiane Görller-Walrand was born in Brussels, Belgium, in 1943. She is a Professor of Chemistry at the Catholic University of Leuven. She obtained her M.S. (1965) and Ph.D. (1969) in Chemistry at the Catholic University of Leuven. She was chairperson of the First International Conference on f-Elements (ICFE-1, Leuven, 1990). Her research interests include coordination chemistry, the spectroscopy of lanthanides and actinides, and MCD spectroscopy. Koen Binnemans was born in Geel, Belgium, in 1970. He obtained his M.S. (1992) and Ph.D. (1996) in Chemistry at the Catholic University of Leuven, under the supervision of Prof. C. Görller-Walrand. Since 1996, he has been a Postdoctoral Fellow of the Fund for Scientific Research Flanders (Belgium). He did postoctoral work with Prof. J. Lucas (Rennes, F) and Prof. D. W. Bruce (Exeter, UK). In 2000, he received the first ERES Junior Award (ERES: European Rare-Earth and Actinide Society).His current research interests are metal-containing liquid crystals (metallomesogens), MRI contrast reagents, lanthanide-doped sol−gel glasses, and lanthanide spectroscopy. Other interests include reading, collecting minerals, Egyptology, and the history of articifial lighting.

show abstract

“…[43] Most examples of lanthanidomesogens are thermotropic liquid crystals, although some examples of lyotropic lanthanidomesogens have also been reported. [43][44][45][46] The rationale for the research interest in lanthanidomesogens is that, by incorporation of rare-earth ions in liquid crystals, it is possible to obtain magnetic [13,47,48] or luminescent liquid crystals. [49,50] Although in some classes of lanthanidomesogens (like phthalocyanines [29] and imidazo [4,5-f] [1,10]phenanthrolines [36] ) the size of the lanthanide(III) ion has only limited or no effect on the transition temperatures, in many cases the lanthanide contraction has a very strong influence on the mesophase behavior.…”

Section: Introductionmentioning

confidence: 99%

Liquid‐Crystalline Ternary Rare‐Earth Complexes

et al. 2008

Self Cite

View full text Add to dashboard Cite

The thermal behavior of the metallomesogens [Ln-(C 12 C 16 dbm) 3 (phen)] (Ln = La, Nd, Eu, Gd, Tb, Dy, Er, Yb; C 12 C 16 dbm = 1-(4-dodecyloxyphenyl)-3-(4-hexadecyloxyphenyl)propane-1,3-dionate; phen = 1,10-phenanthroline) was investigated. The complexes of the light lanthanides (Ln = La, Nd) are not mesomorphic, whereas the complexes of the heavy lanthanides (Ln = Eu, Gd, Tb, Dy, Er, Yb) exhibit

show abstract

Lyotropic mesomorphism of rare-earth trisalkylsulphates in the water-ethylene glycol system

Cited by 15 publications

References 7 publications

Lyotropic La-containing lamellar liquid crystals: phase behaviour, thermal and structural properties

Lyotropic La-containing lamellar liquid crystals: phase behaviour, thermal and structural properties

Lanthanide-Containing Liquid Crystals and Surfactants

Liquid‐Crystalline Ternary Rare‐Earth Complexes

Contact Info

Product

Resources

About