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Avii 400 mhz nmr spectrometer

Manufactured by Bruker
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Sourced in Germany

The AVII 400 MHz NMR spectrometer is a nuclear magnetic resonance instrument designed for analytical applications. It operates at a magnetic field strength of 400 MHz and is capable of performing routine 1D and 2D NMR experiments to characterize the structure and properties of chemical samples.

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Lab products found in correlation

Dimension icon atomic force microscope, by Bruker (1 mentions) D8 focus powder x ray diffractometer, by Bruker (1 mentions)

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400 MHz spectrometer (382 citations) NMR spectrometer (293 citations) 400 MHz NMR spectrometer (161 citations) 400 spectrometer (95 citations) Bruker spectrometers (71 citations) 400 MHz NMR (25 citations) AVII 400 (12 citations) AVII spectrometer (5 citations) AVII-400 MHz (3 citations) 400 NMR spectrometers (2 citations)

3 protocols using avii 400 mhz nmr spectrometer

1

Optimized NMR Spectroscopy for Biological Samples

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All samples were detected by a Bruker AVII 400 MHz NMR spectrometer (Bruker Biospin, Germany) operating at a 1H frequency of 400.13 MHz. Magnetic field homogeneity was optimized by gradient or manual shimming prior to acquisition. The temperature was maintained at 298 K and lock performed on the D2O signal. 1H NMR spectra of urine samples were obtained using a 1D nuclear Overhauser enhancement spectroscopy pulse sequence [RD-90°-t1-90°-tm-90°- ACQ], with the following acquisition parameters: Recycle delay (RD) 1.5 s; t1 3 µs; mixing time, tm 100 ms; 90° pulse width 7.3 μs; number of scans (NS) 256; number of points, TD 32768; spectral width (SW) 8012.82 Hz; acquisition time (AQ) 2.04 s. Water suppression was achieved by irradiation of the water peak during RD and tm. Esophageal tissue 1H NMR spectra were recorded using a standard (1D) Carr–Purcell–Meiboom–Gill pulse sequence with the following acquisition parameters: number of dummy scans 4; RD 70 ms; 90° pulse width 10 μs; NS 64; TD 65536; SW 8012 Hz; AQ 4.09 s.
Liang J.H., Lin Y., Ouyang T., Tang W., Huang Y., Ye W., Zhao J.Y., Wang Z.N, & Ma C.C. (2019). Nuclear magnetic resonance-based metabolomics and metabolic pathway networks from patient-matched esophageal carcinoma, adjacent noncancerous tissues and urine. World Journal of Gastroenterology, 25(25), 3218-3230.
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2

Comprehensive Characterization of Ferroelectric Materials

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All chemicals were purchased from Sigma–Aldrich without further purification. 1H and 13C nuclear magnetic resonance (NMR) was taken by AVII 400 MHz NMR spectrometer of Bruker. Thermogravimetric analyses (TGA) were performed under a nitrogen atmosphere with a heating rate of 10 °C/min using a TA Instruments Trios V3.1 thermogravimetric analyzer. Differential scanning calorimetry (DSC) scans were performed under a nitrogen atmosphere with a heating rate of 10 °C/min using Mettler-Toledo DSC. The dielectric constant was measured by CVU unit in Keithley-SCS4200 with the pelleted sample. Powder X-ray diffraction (PXRD) patterns were recorded on a Bruker D8 Focus Powder X-ray diffractometer using Cu Kα radiation (40 kV, 40 mA) at room temperature. Ferroelectric P-E curve was measured with Precision Multiferroic II Ferroelectric Test System of the Radiant Technologies with high voltage amplifier. Piezoresponse force microscopy (PFM) tests were performed on Bruker Dimension Icon Atomic Force Microscope with grown crystals or spray-coated samples on ITO.
Choi H.S., Li S., Park I.H., Liew W.H., Zhu Z., Kwon K.C., Wang L., Oh I.H., Zheng S., Su C., Xu Q.H., Yao K., Pan F, & Loh K.P. (2022). Tailoring the coercive field in ferroelectric metal-free perovskites by hydrogen bonding. Nature Communications, 13, 794.
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3

Characterization of Molecular Interactions

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All samples were analyzed on a Bruker AVII 400 MHz NMR spectrometer (Bruker Biospin, Germany) operating at a 1H frequency of 400.13 MHz. Magnetic field homogeneity was optimized by gradient or manual shimming prior to acquisition. The temperature was maintained at 298 K and lock performed on the D2O signal.1H NMR spectra were obtained from a one-dimensional NOESY (nuclear overhauser enhancement spectroscopy) pulse sequence [RD-90°-t1-90°-tm-90°-ACQ], with the following acquisition parameters: Recycle Delay, RD = 1.5 s; t1= 3 μs; mixing time, tm=100 ms; 90° pulse width=7.3 μs; number of scans, NS=64; number of points, TD=16380; spectral width, SW=5000 Hz; acquisition time, AQ=1.47 s. Water suppression was achieved by irradiation of the water peak during RD and tm.
Lin Y., Ma C., Liu C., Wang Z., Yang J., Liu X., Shen Z, & Wu R. (2016). NMR-based fecal metabolomics fingerprinting as predictors of earlier diagnosis in patients with colorectal cancer. Oncotarget, 7(20), 29454-29464.
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