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A High-Pressure NMR Probe for Aqueous Geochemistry
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2014 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 53, no 37, 9788-9791 p.Article in journal (Refereed) Published
Abstract [en]

A non-magnetic piston-cylinder pressure cell is presented for solution-state NMR spectroscopy at geochemical pressures. The probe has been calibrated up to 20kbar using insitu ruby fluorescence and allows for the measurement of pressure dependencies of a wide variety of NMR-active nuclei with as little as 10L of sample in a microcoil. Initial (BNMR)-B-11 spectroscopy of the H3BO3-catechol equilibria reveals a large pressure-driven exchange rate and a negative pressure-dependent activation volume, reflecting increased solvation and electrostriction upon boron-catecholate formation. The inexpensive probe design doubles the current pressure range available for solution NMR spectroscopy and is particularly important to advance the field of aqueous geochemistry.

Place, publisher, year, edition, pages
2014. Vol. 53, no 37, 9788-9791 p.
Keyword [en]
geochemistry; high-pressure NMR spectroscopy; NMR probe design; reaction kinetics
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-129113DOI: 10.1002/anie.201404994OAI: oai:DiVA.org:umu-129113DiVA: diva2:1058623
Available from: 2016-12-21 Created: 2016-12-21 Last updated: 2016-12-21

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Ohlin, C. Andre
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