The NMR spectra of 8-Cl-daidzein (1a ) 6-Cl-chrysin (2a ), 8-Cl-chrysin (2b ) and 6,8-di-Cl-chrysin (2c ) were aquired on a Bruker Avance, UltraShield 500 MHz spectrometer (Bruker, BioSpin GmbH, Rheinstetten, Germany) equipped with a 5 mm BBO probe at 298 K. Chemical shifts (δ) are reported in parts per million (ppm) relative to TMS. Deuterated DMSO (DMSO-d6) (δH 2.50 ppm, δC 39.51 ppm) was used as the solvent. Edited-HSQC, HMBC and 1H-1H COSY spectra were recorded using the standard pulse programs from TOPSPIN v.3.6 software.
Ultrashield 500 mhz spectrometer
Manufactured by Bruker
Sourced in Germany
The UltraShield 500 MHz spectrometer is a high-performance nuclear magnetic resonance (NMR) instrument manufactured by Bruker. It is designed to provide precise and reliable measurements of molecular structures and compositions. The core function of the UltraShield 500 MHz spectrometer is to generate a strong, homogeneous magnetic field for the analysis of samples, enabling the observation and characterization of nuclear spins at a frequency of 500 MHz.
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Lab products found in correlation
2 protocols using ultrashield 500 mhz spectrometer
1
NMR Spectroscopic Analysis of Chlorinated Flavonoids
2
Comprehensive Spectroscopic Characterization of Catalysts
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1 H NMR spectra were recorded on a Bruker UltraShield 500 MHz spectrometer. Powder X-ray diffraction patterns were recorded with a Shimadzu XRD 7000 diffractometer using Cu K a radiation (l ¼ 1.5418 Å, 40 kV, 40 mA) at a scanning speed of 0.10 min À1 in the 5-80 2q range. The leaching of metals from the catalyst was monitored by induced coupled plasma analysis on an Agilent Technologies 715 ICP-OES apparatus. XPS analysis was carried out using Kratos AXIS Ultra DLD apparatus equipped with a monochromated Al K a X-ray source, a charge neutralizer and a hemispherical electron energy analyzer with a pass energy of 160 eV. Background subtraction was performed using a Shirley background, and CasaXPS soware was employed to treat the data. The XPS was referenced to the aliphatic C 1s feature at 284.8 eV.
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