High-pressure stopped-flow nuclear magnetic resonance apparatus for the study of fast reactions in solution

Shigenobu Funahashi, Koji Ishihara, Sen Ichi Aizawa, Takashi Sugata, Masao Ishii, Yasuhiro Inada, Motoharu Tanaka

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A high-pressure proton nuclear magnetic resonance (NMR) probe for a stopped-flow method has been developed, which enables us to follow fast reactions at various pressures up to 200 MPa. The high-pressure stopped-flow NMR (HP-SF-NMR) method has been applied to the study of several reactions at high pressures: the reaction of tetramethyltin with iodine in chloroform and the solvent exchange reaction on aluminum(III) ion in N, N-dimethylformamide. The volumes of activation for the iodomerization of tin and the solvent exchange reaction on aluminum(III) were determined to be -24.9±3.8 cm3 mol-1 and -2.2±0.8 cm3 mol-1, respectively. The apparatus permits measurement of activation volumes for reactions with half lives longer than a few seconds if the nuclear relaxation time of the measured proton is short enough. Several requirements for the applicability of HP-SF-NMR are discussed.

Original languageEnglish
Pages (from-to)130-134
Number of pages5
JournalReview of Scientific Instruments
Volume64
Issue number1
DOIs
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Nuclear magnetic resonance
nuclear magnetic resonance
Chemical activation
Aluminum
activation
resonance probes
aluminum
Dimethylformamide
nuclear relaxation
Chlorine compounds
Iodine
proton magnetic resonance
Relaxation time
Tin
chloroform
Ion exchange
Protons
half life
iodine
tin

ASJC Scopus subject areas

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

Cite this

High-pressure stopped-flow nuclear magnetic resonance apparatus for the study of fast reactions in solution. / Funahashi, Shigenobu; Ishihara, Koji; Aizawa, Sen Ichi; Sugata, Takashi; Ishii, Masao; Inada, Yasuhiro; Tanaka, Motoharu.

In: Review of Scientific Instruments, Vol. 64, No. 1, 1993, p. 130-134.

Research output: Contribution to journalArticle

Funahashi, Shigenobu ; Ishihara, Koji ; Aizawa, Sen Ichi ; Sugata, Takashi ; Ishii, Masao ; Inada, Yasuhiro ; Tanaka, Motoharu. / High-pressure stopped-flow nuclear magnetic resonance apparatus for the study of fast reactions in solution. In: Review of Scientific Instruments. 1993 ; Vol. 64, No. 1. pp. 130-134.
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