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Publikováno v:
The European Physical Journal B. 58:223-230
In this contribution we report on the plastic crystal 1-chloroadamantane dynamics via conventional frequency dependent ( 1 H and 13 C) and field cycling NMR measurements. A suitable microscopic dynamical model, worked out from from X-ray analysis is
Publikováno v:
Molecular Crystals and Liquid Crystals. 460:43-61
The polymorphism and molecular dynamics of the liquid crystal MBBA [N-(p-methoxybenzylidene)-p-n-butylaniline], confined in controlled pores glasses (CPG) porous glasses of 82, 156, and 337 A pore diameter, were investigated using 1H nuclear magnetic
Publikováno v:
Pharmaceutical Research. 23:798-805
This study was conducted to characterize the molecular mobility of supercooled fananserine and derive from this analysis the non-Arrhenius and nonexponential properties of the primary alpha-relaxation.The use of three investigation techniques of the
Publikováno v:
The Journal of Physical Chemistry B. 110:457-464
Crystallization processes in indomethacin can be observed below Tg leading to different forms depending on the thermal treatment: a rapid and deep quench below Tg leads to the metastable alpha-phase and a slow cooling close to Tg gives rise to the st
Publikováno v:
The Journal of Chemical Physics. 121:6470-6477
The dynamics in supercooled meta-toluidine was studied using dielectric relaxation, modulated differential scanning calorimetry, proton spin-lattice relaxation times, and viscosity measurements. The combination of these different techniques has clear
Publikováno v:
Phase Transitions. 76:807-813
Phase transitions and dynamics of the liquid crystal MBBA [N-( p-methoxybenzylidene)-p-n-butylaniline] microconfined within porous glasses of average pore diameters: 82 and 337 A were investigated by 1H Nuclear Magnetic Resonance (NMR). Confinement i
Publikováno v:
Molecular Crystals and Liquid Crystals. 382:97-111
The polymorphism of 4-cyano-4′-pentylbiphenyl (5CB) was investigated by means of differential scanning calorimetry (DSC), X-ray diffraction, and proton nuclear magnetic resonance (NMR) experiments. Three new phases has been identified and character
Publikováno v:
Journal of Physics and Chemistry of Solids. 61:887-897
The crystal structure of ( i -C 4 H 9 NH 3 ) 3 Bi 2 Br 9 at room temperature has been determined and refined to R =0.036. The crystal is orthorhombic, space group Ama 2. The structure is built up of the i -butylammonium cations and isolated Bi 2 Br 9
Publikováno v:
Le Journal de Physique IV. 10:Pr7-299
The temperature dependence of the proton relaxation rates has been studied in molecular glassy crystals cyano-adamantane (C 10 H 15 CN) confined in the porous space of a silica glass of 60A and 150A nominal pore sizes. In the temperature range corres