𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Phase transition of L-Ser monohydrate crystal studied by 13C solid-state NMR

✍ Scribed by Tsunenori Kameda; Hidetoshi Teramoto

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
351 KB
Volume
44
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

We used gravimetric analysis (GA) and ^13^C solid‐state nuclear magnetic resonance (NMR) to study solid‐phase transition from the transparent single crystal of L‐serine (L‐Ser) monohydrate to a turbid powder. We found that L‐Ser monohydrate loses water molecules and transforms into an anhydrate, thus experimentally demonstrating Frey's assumption (Acta Cryst., B29, 876, 1973). Application of a handmade cross‐polarization (CP) NMR probe with a saddle‐type coil to the oriented crystal of the L‐Ser monohydrate revealed the dehydration mechanism. Furthermore, the chemical shift tensor components of the carboxyl carbon in L‐Ser monohydrate were determined. The difference in the tensor component of δ~22~ between the monohydrate and anhydrate forms was more than 7 ppm, probably owing to differences in the hydrogen‐bonding structure of each form. Copyright © 2006 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

Conformation of drawn poly(trimethylene
Conformation of drawn poly(trimethylene terephthalate) studied by solid-state 13C NMR
✍ Tsunenori Kameda; Mitsuhiro Miyazawa; Shigemitsu Murase 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 142 KB

## Abstract The change in the conformation of the flexible OCH~2~CH~2~CH~2~O segment of poly(trimethylene terephthalate) (PTT) monofilament caused by drawing was investigated by means of the γ‐__gauche__ effect on the ^13^C solid‐state NMR chemical shift of the internal methylene carbon, combin

Hydrogen Bonding Structure and Stability
Hydrogen Bonding Structure and Stability of α-Chitin Studied by 13C Solid-State NMR
✍ Tsunenori Kameda; Mitsuhiro Miyazawa; Hiroshi Ono; Mitsuru Yoshida 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 94 KB

## Abstract **Summary:** The structure and stability of hydrogen bonds in __α__‐chitin were investigated by ^13^C solid‐state NMR measurements at different temperatures. Splitting of the carbonyl carbon signal for __α__‐chitin was interpreted as two types of hydrogen bonding; the peaks at 173.5 and

Variability of cork from Portuguese Quer
Variability of cork from Portuguese Quercus suber studied by solid-state 13C-NMR and FTIR spectroscopies
✍ M. H. Lopes; A. S. Barros; C. Pascoal Neto; D. Rutledge; I. Delgadillo; A. M. Gi 📂 Article 📅 2001 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 199 KB 👁 2 views

## Abstract A new approach is presented for the study of the variability of Portuguese reproduction cork using solid‐state ^13^C‐NMR spectroscopy and photoacoustic (PAS) FTIR (FTIR‐PAS) spectroscopy combined with chemometrics. Cork samples were collected from 12 different geographical sites, and th

Structure of GlyGly peptide in the cryst
Structure of GlyGly peptide in the crystalline state as studied by X-ray diffraction and solid state 13C-NMR methods
✍ T. Kameda; N. Takeda; S. Ando; I. Ando; D. Hashizume; Y. Ohashi 📂 Article 📅 1998 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 140 KB 👁 2 views

A new type of crystal of glycylglycine (GlyGly) hydrate was crystallized from an aqueous solution, and the structure of the crystal has been determined by x-ray diffraction. The crystal is monoclinic, and the space group is C2/c, with the cell constants of a Å 15.941(2) A ˚, b Å 4.774(2) A ˚, c Å 19