A lyotrope gradient method for liquid crystal temperature-composition-mesomorph diagram construction using time-resolved x-ray diffraction

A lyotrope gradient method for liquid crystal temperature-composition-mesomorph diagram construction using time-resolved x-ray diffraction.

A new method for rapidly constructing isobaric temperature-composition-mesomorph (T-C) diagrams is described. The method involves establishing a lyotrope concentration gradient in a liquid crystal lengthwise in an x-ray capillary tube. At a fixed temperature such a sample corresponds to an isotherm in the corresponding isobaric T-C diagram. The concentration gradient is conveniently established...

A temperature gradient method for lipid phase diagram construction using time-resolved x-ray diffraction.

A method that enables temperature-composition phase diagram construction at unprecedented rates is described and evaluated. The method involves establishing a known temperature gradient along the length of a metal rod. Samples of different compositions contained in long, thin-walled capillaries are positioned lengthwise on the rod and "equilibrated" such that the temperature gradient is communi...

X-ray Diffraction and SEM Studies on the Effect of Temperature on the Formation of Main Phase Sr2MgSi2O7 Using a Wet and Dry Method for its Preparation

A pure Silicate host namely Sr2MgSi2O7 as a support for a long-lasting afterglow when dopped with rare-earth elements was sought after. To this end the process of obtaining firing temperatures of the above mentioned phase in normal condition was carried out using suggested wet and dry methods. The degree of purity obtained in these preparatory methods as wel...

Current Developments in Time-resolved X-ray Diffraction

Excited-state structure by time-resolved X-ray diffraction.

X-ray crystallography has traditionally been limited to the study of the ground-state structure of molecules and solids. Recent technical advances are removing this limitation as demonstrated here by a time-resolved stroboscopic study of the photo-induced 50 micros lifetime excited triplet state of the [Pt(2)(pop)(4)](4-)ion [pop = pyrophosphate, (H(2)P(2)O(5))(2-)], performed at helium tempera...