Presence of two freezing-in processes concerning alpha-glass transition in the new liquid phase of triphenyl phosphite and its consistency with "cluster structure" and "intracluster rearrangement for alpha process" models

Article Abstract:

A study was conducted to investigate two amorphous or liquid phases of triphenyl phosphite. High precision x-ray diffraction patterns were derived for these two phases designated as Ln, for the normally condensed liquid phase and Lc, for the highly correlated liquid phase. An Lc-phase sample was prepared by annealing the Ln-phase sample at 210 K and other Lc-phase samples were formed by annealing the obtained Lc-phase sample at 215 and 220 K. The most remarkable finding is that there exists two relaxation processes in the phase.

Research, Case studies, Supercooled liquids, Amorphous substances, Amorphous materials, Diffraction patterns

---

Molecular structure of a D-homoandrostanyl steroid derivative: Single crystal and powder diffraction analysis

Article Abstract:

The crystallographic structure of a steroid derivative molecule, 17,17-di-n-propyl-17a-aza-D-homo-5alpha-androstan-3beta-ol is obtained from a single crystal by laboratory X-ray and from a polycrystalline powder by high-resolution synchrotron powder diffraction. The molecule crystallizes in the orthorhombic space group P[2.sub.1][2.sub.1][2.sub.1] (a = 6.5346, b = 17.6006 and C = 19.6978 Angstrom) and the hydrogen bonds from infinite chains of molecules parallel to the c axis.

Analysis, Crystallography, X-rays, X-ray diffraction, Structure, Chemical properties, Steroids (Organic compounds), Steroids

---

Similar abstracts:

• Abstracts: Molecular dynamics in binary organic glass formers. Molecular motion in the two amorphous phases of triphenyl phosphite
• Abstracts: High-resolution solid-state NMR studies of poly(vinyl phosphonic acid) proton-conducting polymer: molecular structure and proton dynamics
• Abstracts: Prediction of partition coefficients of fluorous and nonfluorous solutes in fluorous biphasic solvent systems by mobile order and disorder theory
• Abstracts: Charge transport and recombination in a nanoscale interpenetrating network of n-type and p-type semiconductors: Transient photocurrent and photovoltage studies of TiO2/Dye/CuSCN photovoltaic cells
• Abstracts: Dynamics in the presence of attractive patchy interactions. On the possibility of extending the Noro-Frenkel generalized law of correspondent states to nonisotropic patchy interactions

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.