PubAg

Main content area

Monitoring electrochemical reactions in situ using steady-state free precession 13C NMR spectroscopy

Author:
Nunes, Luiza M.S., Moraes, Tiago B., Barbosa, Lucio L., Mazo, Luiz H., Colnago, Luiz A.
Source:
Analytica chimica acta 2014 v.850 pp. 1-5
ISSN:
0003-2670
Subject:
analytical chemistry, electrochemistry, monitoring, nuclear magnetic resonance spectroscopy
Abstract:
All attempts to use in situ13C NMR in spectroelectrochemical studies, using static cells and unlabeled substrates, have failed due to the very long average time (several hours). In this paper, we demonstrated that steady-state free precession (SSFP) pulse sequence can enhance signal to noise ratio and reduces the average time of 13C NMR signals by more than one order of magnitude. The results showed that each 13C NMR spectrum during the electrochemical reduction of 9-chloroanthracene, in a static cell, can be acquired in eleven minutes. This short averaging time allowed the analysis of the reaction every 30min during 3h. The phase and truncation anomalies present in SSFP spectra were minimized using Traff apodization function and Krylov basis diagonalization method (KBDM).
Agid:
5447218