Nuclear Magnetic Resonance Relaxometry
Nuclear Magnetic Resonance Relaxometry
Location: TVT, Egerlandstr. 3, 91058 Erlangen, Room T2.100
The benchtop time-domain 1H nuclear magnetic resonance (NMR) relaxometry device allow one to determine the spin-lattice (T1) relaxation time using the inversion recovery method and spin-spin (T2) relaxation time using the Car, Purcell, Meiboom, Gill (CPMG) method. This allows one to measure the relaxation times of liquids on contact to nonporous or porous materials. The reduction of the relaxation time of the liquid in contact to the material’s surface compared to the pure bulk-like fluid can give valuable information about textural properties (e.g. surface area) of the materials as well as about its wettability.
Dr.-Ing. Carola Vorndran
Nuclear Magnetic Resonance Relaxometry | Acorn Area | Xigo Nanotools
The Acorn Area is a Benchtop Timo-Domain 1H NMR device with a frequency of 13 MHz. It allows for the measurement of the spin-lattice (T1) using the inversion recovery method and spin-spin (T2) relaxation time using the Car, Purcell, Meiboom, Gill (CPMG) method. The temperature of the device can be stabilized between 10 and 30°C with an external thermostat. Samples are measured in 5 mm NMR tubes.
Nuclear Magnetic Resonance Relaxometry | Minispec mq20 | Bruker
The Minispec mq20 is a Benchtop Timo-Domain 1H NMR device with a frequency of 20 MHz (0.47 T magnetic field strength). The temperature of the device can be stabilized between 5 and 50°C with an external thermostat. Samples can be measured in 10 mm or 18 mm NMR tubes. It allows for the measurement of the spin-lattice (T1) using the inversion recovery method and spin-spin (T2) relaxation time using the Car, Purcell, Meiboom, Gill (CPMG) method. The magnetization decay can be fitted using a monoexponential decay function or a sum of up to four exponential functions, which allows one to identify up to four relaxation times per sample. The software CONTIN allows for the determination of relaxation time distributions.
The device allows one to measure the relaxation times T1 and T2 of liquids in contact to nonporous and porous materials. The reduction in relaxation time for liquid in contact to the material’s surface in comparison to the pure liquid can give valuable information about textural properties (e.g. surface area, pore size) and the wettability of the material.
- Schlumberger, C., Cuadrado Collados, C., Söllner, J., Huber, C., Wisser, D., Liu, H.F.,… Thommes, M. (2024). Characterization of Functionalized Chromatographic Nanoporous Silica Materials by Coupling Water Adsorption and Intrusion with Nuclear Magnetic Resonance Relaxometry. ACS Applied Nano Materials, 7(2), 1572-1585. https://doi.org/10.1021/acsanm.3c04330
- Schlumberger, C., Sandner, L., Michalowski, A., & Thommes, M. (2023). Reliable Surface Area Assessment of Wet and Dry Nonporous and Nanoporous Particles: Nuclear Magnetic Resonance Relaxometry and Gas Physisorption. Langmuir. https://doi.org/10.1021/acs.langmuir.2c03337
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