Liquid- and solid-state 1200 MHz spectrometer (ULille)

NMR

Description

NMR spectroscopy is a powerful method to probe the atomic-scale structure and dynamics of a wide range of soft matter samples, including polymer materials, nanocomposites, gels, colloids, surfactant self-assemblies, biomacromolecules and liquid crystals. Because NMR gives information on the local atomic scale, it can easily characterize the bonding environment of atoms in soft materials, which often lack long-range positional order. Furthermore, NMR is a sensitive probe of local dynamics at atomic scale over timescales spanning 15 orders of magnitude, from 10^-12 s to 10² s. It can thus be used to study motions, including bond vibrations, conformational changes, rotational and translational motions of the molecules. 

This Bruker-BioSpin spectrometer has been installed within the USTL-NMR infrastructure in 2022 and is available to the EUSMI transnational access. Thanks to its very high magnetic field (28 T), this spectrometer provides unparalleled resolution and sensitivity. Furthermore, this spectrometer is one of the first of its kind for the study of soft-matter materials. It is equipped with two probes for liquids (including a cryogenically cooled one to enhance the sensitivity for liquid-state samples) and at three MAS probes for the study of solids. This equipment opens new avenues for the NMR characterization of surfaces, defects, volume-limited samples, such as thin-films or isotopically labeled materials, as well as for the detection in solids of protons, quadrupolar isotopes (which represent almost 75% of NMR-active nuclei and include ²⁷Al, ¹¹B, ²³Na, ¹⁷O, etc), and insensitive isotopes because of low gyromagnetic ratio or low natural abundance. The high magnetic field also permits to probe faster molecular motions.

The specifications of the instrument are listed below:

Field: 28.2 T

Console: Bruker BioSpin Avance Neo 1200 MHz 4 channels

Sample changer: SampleCaseJet (24 positions)

Temperature: BCU II for variable temperature NMR experiments

Liquid-state NMR probes:

• 3 mm PA-TXI ¹H/¹³C/¹⁵N/²H cryogenic probe with z-gradient, ATMA, temperature range: [-40; 80°C];
• 5 mm BBI probe (tuning range: ¹⁰⁹Ag-³¹P) with z-gradient, ATMA, temperature range: [-40; +80°C].

 

Solid-state NMR probes:

• 0.7mm HCN (¹H/¹³C/¹⁵N) DVT MAS probe;
• 1.3mm HX (¹H/¹⁰³Rh-¹¹B) DVT MAS probe;
• 3.2mm HX (¹H/¹⁰³Rh-¹¹B) DVT MAS probe.

 

 

Local Contacts

• Prof. Olivier Lafon
• Dr. Julien TREBOSC
• Dr. Bertrand Doumert

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