𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Neutron scattering study of amorphous tri-O-methyl-β-cyclodextrin

✍ Scribed by I Tsukushi; T Kanaya; O Yamamuro; T Matsuo; K Kaji

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
103 KB
Volume
60
Category
Article
ISSN
0022-3697

No coin nor oath required. For personal study only.

✦ Synopsis

Low energy excitations in crystalline and amorphous solids of Tri-O-methyl-b-cyclodextrin (TMCD) were studied by neutron scattering and calorimetric techniques. Amorphous solids of TMCD were prepared by two different ways: mechanical milling and liquid-quenching amorphization. Both the amorphous solids showed a boson peak at around 2 meV and there was no significant difference between them. It was noted that crystalline TMCD also showed a boson peak. This anomalous boson peak in the crystalline state was confirmed by low temperature heat capacity measurements.

📜 SIMILAR VOLUMES

NMR study of methyl 3,4,6-tri-O-acetyl-2
NMR study of methyl 3,4,6-tri-O-acetyl-2-deoxy-2-(alkylureido)-β-D-glucopyranosides
✍ Iwona Wawer; Małgorzata Weychert; Jan Klimkiewicz; Bogusława Piekarska-Bartoszew 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 117 KB 👁 1 views

Five derivatives of methyl 3,4,6-triacetyl-2-deoxy-(3@-dialkylureido)-b-D-glucopyranoside were studied by 1H and 13C, NMR spectroscopy in solutions and by 13C NMR spectroscopy in the solid state. Sterically CDCl 3 crowded substituents such as n-hexyl and cylcohexyl change the chemical shifts of H-1,

Crystal structure of the 1:1 complex of
Crystal structure of the 1:1 complex of heptakis(2,3,6-tri-O-methyl)cyclomaltoheptaose (permethylated β-cyclodextrin) with ethyl laurate
✍ Dimitri Mentzafos; Irene M. Mavridis; Henk Schenk 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 714 KB

The crystal of the 1: 1 complex of ethyl laurate with heptakis(2,3,6-tri-0-methyl)cyclomaltoheptaose (ThI-@CD, permethyIated &cyclodextrin) is orthorombic, P&2,2,, with a = 14.796(Z), b m 22.444(6), c = 27.720@) A; V = 9~5(4) k3; and Z = 4. The macrocycles have a distorted ~nfo~ation due to the abse