Drx 250 spectrometer

Manufactured by Bruker

Sourced in Germany

The DRX-250 spectrometer is a nuclear magnetic resonance (NMR) instrument designed for chemical analysis. It provides high-resolution NMR spectroscopy capabilities for structural elucidation and quantitative analysis of organic and inorganic compounds.

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Lab products found in correlation

Allopurinol, by Merck Group (1 mentions) Chloranil, by Merck Group (1 mentions) Ftir spectrophotometer, by Shimadzu (1 mentions) 2 3 dichloro 5 6 dicyano 1 4 benzoquinone, by Merck Group (1 mentions) Picric acid, by Merck Group (1 mentions)

Close spelling variants of this product

DRX-250 AVANCE spectrometer (6 citations) DRX-250 (5 citations) DRX spectrometer (37 citations) Bruker spectrometers (71 citations)

4 protocols using drx 250 spectrometer

Synthesis and Antimicrobial Evaluation of UV Absorber

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The UV absorption
spectra of the synthetic UV absorber were recorded on a Lambda 900
UV–vis spectrometer and using dimethyl formamide (DMF) as solvent.
Infrared spectra were recorded on a Bruker IFS-113 spectrometer (KBr
pellets). ¹³C and ¹H NMR spectroscopies were
performed on a Bruker DRX-250 spectrometer in dimethyl sulfoxide solution.
ESI mass spectra were recorded on a TQ-8030 mass spectrometer. Elemental
analysis was recorded on a 3V-EDX8600 Elementar. The bacteriostatic
properties were investigated with the MIC and MBC of E. coli and S. aureus.

, & Shan M. (2022). Strategy of Integrating Ultraviolet Absorption and Antimicrobial Activity in a Single Molecule: DFT Calculation and Experiment. ACS Omega, 7(45), 41575-41580.

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NMR Spectroscopy with Bruker DRX-250

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¹H-, ¹³C{¹H}-, and ²⁹Si-INEPT-NMR measurements were done with a Bruker DRX-250 spectrometer (Bruker, Karlsruhe, Germany). All values are given in ppm against the external standard SiMe₄.

Binder M., Schrenk C., Block T., Pöttgen R, & Schnepf A. (2018). LiGe(SiMe3)3: A New Substituent for the Synthesis of Metalloid Tin Clusters from Metastable Sn(I) Halide Solutions. Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry, 23(5), 1022.

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Determination of Diastereomer Ratio in NMR Spectra

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The NMR spectra were recorded on a Bruker DRX250 spectrometer in solvent DMSO-d 6 using TMS as ) : δ (ppm) 9.12 (1H, d, J = 7.0 Hz, NH major ), 9.06 (1H, d, J = 7.0 Hz, NH minor ), 7.4-7.2 (10H, m, Ph), 5.46 (1H, J = 7.0 Hz, H-3 major ), 5.37 (1H, J = 7.0, H-3 minor ), 4.35 (2H, d, J = 9.0 Hz, H-6 major , H-6 minor ), 3.64 (3H, s, OCH 3 -10 major ), 3.62 (3H, s, OCH 3 -10 minor ), 2.01 (2H, m, H-11 major , H-11 minor ), 1.06 (3H, d, J = 6.5 Hz, CH 3major ), 1.01 (3H, d, J = 7.0 Hz, CH 3minor ), 0.98 (3H, d, J = 7.0 Hz, CH 3minor ), 0.84 (3H, d, J = 6.5 Hz, CH 3major ). Mixture of two diastereomers 2:1 as determined from the integrated intensity of the signals. 13 (link) ,d, J = 6.5 Hz, CH 3 ), 0.90 (3H, d, J = 7.0 Hz, CH 3 ), 0.85 (3H, d, J = 6.5 Hz, CH 3 ), 0.67 (3H, d, J = 7.0 Hz, CH 3 ). Mixture of two diastereomers 1:1 as determined from the integrated intensity of the signals. 13 (link)

Yancheva D., Cherneva E., Quick M., Mikhova B., Shivachev B., Nikolova R., Djordjevic A., Untergehrer M., Jürgenliemk G., Kraus B, & Smelcerovic A. (2015). Synthesis, Crystal Structure and Biological Activity Screening of Novel N-(α-Bromoacyl)-α-amino Esters Containing Valyl Moiety. Acta chimica Slovenica, 62(3).

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Characterization of Allopurinol Charge-Transfer Complexes

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All the chemicals used were of analytical grade and were used as purchased without further purification. Allopurinol (purity > 99 %) and the organic acceptors, picric acid (purity ³ 98 %), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (purity > 98 %) or chloranil (purity ³ 99 %) (Fig. 1) were purchased from Sigma-Aldrich Chemical Co. (USA).
C, H and N were analyzed using a Perkin-Elmer 2400 series CHN micro analyzer (USA) in order to obtain the stoichiometry of the interaction. The IR spectra of the products (KBr discs) were measured at room temperature using a Shimadzu FT-IR spectrophotometer (Japan) over the range of 4000-400 cm -1 with 30 scans at 2 cm -1 resolution. The Raman laser spectra of the products were acquired on a Bruker FT-Raman spectrophotometer equipped with a 50-mW laser (Bruker, Germany). 1 H and 13 C NMR spectra were collected on a Bruker DRX-250 spectrometer operating at 600 MHz (Bruker). Measurements were performed at ambient temperature using dimethylsulfoxide (DMSO-d 6 ) as the solvent and tetramethylsilane (TMS) as the internal reference.

Refat M.S., Saad H.A., Adam A.M., Al-Omar M.A, & Naglah A.M. (2016). Charge transfer interaction of organic p-acceptors with the anti-hyperuricemic drug allopurinol: Insights from IR, Raman, 1H NMR and 13C NMR spectroscopies. Acta pharmaceutica (Zagreb, Croatia), 66(4).

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