CATIONIC MOTIONS INVOLVING SELF-DIFFUSION AND STRUCTURAL PHASE TRANSITIONS IN SOLID DIMETHYL- AND TRIMETHYLAMMONIUM NITRATES AS STUDIED BY DIFFERENTIAL THERMAL ANALYSIS AND 1H NMR TECHNIQUES.

Hiroyuki Ishida, Ryuichi Ikeda, Daiyu Nakamura

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Differential thermal analysis and the temperature dependence of broad-line **1H NMR absorptions and of **1H spin-lattice relaxation times in both laboratory and rotating frames were observed for (CH//3)//2NH//2NO//3, (CH//3)//2ND//2NO//3, and (CH//3)//3NHNO//3. A solid-solid phase transition was located at 297 K for (CH//3)//2NH//2NO//3, while two phase transitions at 359 and 407 K were found for (CH//3)//3NHNO//3. The **1H spin-lattice relaxation times in the laboratory frame at different Larmor frequencies and those in the rotating frame at the rf field of 8 G observed for the above salts were analyzed by referring to the **1H NMR second moments determined. The motional parameters of the cations in each solid phase of the salts were evaluated by a fitting calculation to the relaxation times observed.

Original languageEnglish
Pages (from-to)598-605
Number of pages8
JournalBerichte der Bunsengesellschaft/Physical Chemistry Chemical Physics
Volume90
Issue number7
DOIs
Publication statusPublished - Jan 1 1986
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)

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