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Effect of NMR magnetic field in chemical reactions monitored NMR in situ

Abstract

In 2014 we have demonstrated, for the first time, that an electrochemical reaction (Cu2+ electrodeposition) monitored in situ by low field NMR spectroscopy is much faster than the respective reaction performed ex situ. Therefore, this demostrate that NMR is not a passive technique, as previously considered, but has a strong influence on the kinetics of the electrochemical reaction. This effect was also observed when the copper electrodeposition reaction was performed using a unilateral NMR spectrometer.The explanation for the NMR effect on the electrochemical reactions rate comes from the Lorentz force. This force is observed when the sample is submitted to an electric and magnetic fields. The effect of a magnetic field on electrochemical studies is known for a long time and the first observation was registered in Faraday diaries. The magnetic field also acts when in reactions is performed wihtout electric field. This force is observed in the presence of strong magnetic field gradient and in the presence of a gradient of concentration of paramagnetic specie . Despite being known for long time in electrochemistry, only in the last decades the qualitative and quantity explanation of the phenomena were determined. This area of study is known as magnetoelectrochemistry or magnetoelectrolysis.Although the effect of NMR magnetic field in electrochemical reaction monitored in situ has been demonstrated with a paramagnetic ion (Cu2+), the effect of the magnetic field can also occur with diamagnetic substances and in the absence of electric field applied.Therefore, the objective of this research is to evaluate the effect of the magnetic field of low field NMR spectrometers (up to about 0.5 T) and high field NMR (above 9 T) in electrochemical reactions (with and without the application of Eelectric field) and in non-electrochemical reactions (AU)

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Scientific publications (13)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MONTRAZI, ELTON TADEU; MONARETTO, TATIANA; BONAGAMBA, TITO JOSE; COLNAGO, LUIZ ALBERTO. New and rapid pulse sequences for two-dimensional D-T-1 correlation measurements. JOURNAL OF MAGNETIC RESONANCE, v. 315, JUN 2020. Web of Science Citations: 0.
BENDERS, STEFAN; GOMES, BRUNA FERREIRA; CARMO, MARCELO; COLNAGO, LUIZ ALBERTO; BLUEMICH, BERNHARD. In-situ MRI velocimetry of the magnetohydrodynamic effect in electrochemical cells. JOURNAL OF MAGNETIC RESONANCE, v. 312, MAR 2020. Web of Science Citations: 0.
MONARETTO, TATIANA; MONTRAZI, ELTON TADEU; MORAES, TIAGO BUENO; SOUZA, ANDRE ALVES; RONDEAU-MOURO, CORINNE; COLNAGO, LUIZ ALBERTO. Using T-1 as a direct detection dimension in two-dimensional time-domain NMR experiments using CWFP regime. JOURNAL OF MAGNETIC RESONANCE, v. 311, FEB 2020. Web of Science Citations: 0.
MONARETTO, TATIANA; SOUZA, ANDRE; MORAES, TIAGO BUENO; BERTUCCI-NETO, VICTOR; RONDEAU-MOURO, CORINNE; COLNAGO, LUIZ ALBERTO. Enhancing signal-to-noise ratio and resolution in low-field NMR relaxation measurements using post-acquisition digital filters. Magnetic Resonance in Chemistry, v. 57, n. 9, p. 616-625, SEP 2019. Web of Science Citations: 1.
DA SILVA, POLLYANA FERREIRA; GOMES, BRUNA FERREIRA; SILVA LOBO, CARLOS MANUEL; KENG QUEIROZ JUNIOR, LUIZ HENRIQUE; DANIELI, ERNESTO; CARMO, MARCELO; BLUEMICH, BERNHARD; COLNAGO, LUIZ ALBERTO. Electrochemical NMR spectroscopy: Electrode construction and magnetic sample stirring. Microchemical Journal, v. 146, p. 658-663, MAY 2019. Web of Science Citations: 1.
MORAES, TIAGO BUENO; MONARETTO, TATIANA; COLNAGO, LUIZ ALBERTO. Applications of Continuous Wave Free Precession Sequences in Low-Field, Time-Domain NMR. APPLIED SCIENCES-BASEL, v. 9, n. 7 APR 1 2019. Web of Science Citations: 0.
LOBO, CARLOS M. S.; GOMES, BRUNA F.; BOUZOUMA, HAJAR; DANIELI, ERNESTO; BLUEMICH, BERNHARD; COLNAGO, LUIZ A. Improving in operando low field NMR copper electrodeposition analyses using inductively coupled coils. Electrochimica Acta, v. 298, p. 844-851, MAR 1 2019. Web of Science Citations: 2.
GOMES, BRUNA FERREIRA; SILVA LOBO, CARLOS MANUEL; COLNAGO, LUIZ ALBERTO. Monitoring Electrochemical Reactions in Situ with Low Field NMR: A Mini-Review. APPLIED SCIENCES-BASEL, v. 9, n. 3 FEB 1 2019. Web of Science Citations: 0.
FERREIRA, JOSILEI DA SILVA; MORAES, TIAGO BUENO; COLNAGO, LUIZ ALBERTO; VERBI PEREIRA, FABIOLA MANHAS. Enzymatic Activity Prediction Using Time-Domain Nuclear Magnetic Resonance (TD-NMR) and Multivariate Analysis: A Case Study Using Cassava Roots. APPLIED MAGNETIC RESONANCE, v. 49, n. 7, p. 653-664, JUL 2018. Web of Science Citations: 0.
SANTOS, POLIANA M.; COLNAGO, LUIZ ALBERTO. Comparison Among MIR, NIR, and LF-NMR Techniques for Quality Control of Jam Using Chemometrics. FOOD ANALYTICAL METHODS, v. 11, n. 7, SI, p. 2029-2034, JUL 2018. Web of Science Citations: 2.
KOCK, FLAVIO V. C.; MACHADO, MAIARA P.; ATHAYDE, GEISAMANDA P. B.; COLNAGO, LUIZ A.; BARBOSA, LUCIO L. Quantification of paramagnetic ions in solution using time domain NMR. PROS and CONS to optical emission spectrometry method. Microchemical Journal, v. 137, p. 204-207, MAR 2018. Web of Science Citations: 2.
KILLNER, MARIO HENRIQUE M.; TOSIN, GIANCARLO; CARVALHO, ANDRE S.; BERNARDES, DIEGO FIRME; COLNAGO, LUIZ ALBERTO. Increasing the detection distance of remote NMR using wireless inductive coupling coil. SCIENTIFIC REPORTS, v. 7, OCT 4 2017. Web of Science Citations: 3.
LOBO, CARLOS M. S.; TOSIN, GIANCARLO; BAADER, JOHANN E.; COLNAGO, LUIZ A. Complementary analyses of hollow cylindrical unioriented permanent magnet (HCM) with high permeability external layer. JOURNAL OF MAGNETIC RESONANCE, v. 283, p. 79-88, OCT 2017. Web of Science Citations: 0.

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