A Bruker (DRX-400 Avance) NMR spectrometer was used to obtain the NMR spectra. FTIR spectra were obtained using the Bruker, Equinox 55 spectrometer. Melting points were determined by the Buchi melting point B-540 B.V.CHI apparatus. Field emission scanning electron microscopy (FE-SEM) was carried out via Mira 3-XMU, and transmission electron microscopy (TEM) was conducted using Philips CM120 with the LaB6 cathode and the accelerating voltage of 120 kV. The X-ray diffraction (XRD) pattern was obtained by the Philips X'pert MPD diffractometer equipped with a Cu Kα anode (k = 1.54 Å) in the 2θ range from 10° to 80°. The VSM measurements were performed using a vibrating sample magnetometer (Meghnatis Daghigh Kavir Co. Kashan, Iran). The thermogravimetric analysis (TGA) was conducted by NETZSCH TG 209 F1 Iris. Energy-dispersive X-ray spectroscopy (EDS) of the catalyst was conducted by the EDS instrument Phenom pro X.
Avance drx 400 nmr spectrometer
Manufactured by Bruker
Sourced in United Kingdom, Germany
The Avance DRX-400 NMR spectrometer is a laboratory instrument designed for nuclear magnetic resonance (NMR) spectroscopy. It operates at a frequency of 400 MHz and is capable of performing high-resolution analysis of chemical and biological samples.
Automatically generated - may contain errors
Lab products found in correlation
X pert mpd diffractometer, by Philips (1 mentions)
Equinox 55 spectrometer, by Bruker (1 mentions)
Cm120, by Philips (1 mentions)
Tg 209 f1 iris, by Netzsch (1 mentions)
Ir 470 spectrometer, by Shimadzu (1 mentions)
Unity inova 500 mhz, by Bruker (1 mentions)
X series 2, by Thermo Fisher Scientific (1 mentions)
Zetasizer nano z, by Malvern Panalytical (1 mentions)
Uv vis nir spectrophotometer, by Shimadzu (1 mentions)
Rp 18, by Merck Group (1 mentions)
Sephadex lh 20, by GE Healthcare (1 mentions)
6 protocols using avance drx 400 nmr spectrometer
1
Comprehensive Characterization of Catalytic Materials
2
Synthesis of Phosphonated Cyclopentenone Derivatives
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All solvents and chemicals were purchased from commercial sources and used without further purification. The utilized ethyl arylmethylidincyanoacetates were prepared by the Knovenagel condensation of aldehydes with ethyl cyanoacetate on the basis of the reported procedure [19] (link). Melting points were determined on a Melt-Tem II melting point apparatus and are uncorrected. IR spectra were recorded on a Shimadzu IR-470 spectrometer. All the NMR spectra were recorded on a Varian model UNITY Inova 500 MHz or Bruker DRX-400 Avance NMR spectrometer. Chemical shifts of 1 H, 13 C and 31 P NMR are reported in parts per million (ppm) from tetramethylsilane (TMS) as an internal standard or 85% H 3 PO 4 as external standard in DMSO-d 6 as solvent.
General procedure for synthesis of phosphonated cyclopentenone derivatives 4a-o.
DAAD (1.0 mmol) was added dropwise to the mixture of trialkyl phosphite (1.0 mmol), ethyl arylmethylidincyanoacetate (1.0 mmol) and NaN 3 (0.1 mmol) in acetone at room temperature. The reaction mixture was then stirred at room temperature for 12 hours. The solvent was removed under reduced pressure, and the solid residue was washed with water (15 mL) and diethyl ether (15 mL) to afford the pure phosphonated cyclopentenone derivative.
General procedure for synthesis of phosphonated cyclopentenone derivatives 4a-o.
DAAD (1.0 mmol) was added dropwise to the mixture of trialkyl phosphite (1.0 mmol), ethyl arylmethylidincyanoacetate (1.0 mmol) and NaN 3 (0.1 mmol) in acetone at room temperature. The reaction mixture was then stirred at room temperature for 12 hours. The solvent was removed under reduced pressure, and the solid residue was washed with water (15 mL) and diethyl ether (15 mL) to afford the pure phosphonated cyclopentenone derivative.
3
Tetracaine NMR Spectroscopy at pH Extremes
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Tetracaine solutions at pH 4, 6, 7.6, 9 and 10 were prepared in deuterium oxide at the same concentrations used for molecular aggregate size analysis. The spectra of each solution were obtained with a Bruker Avance DRX400 NMR spectrometer (Bruker, Coventry, UK). A 600 μL aliquot of each sample was used for the measurements which were conducted at 400 MHz with 5000 scans. The peak assignments in the spectra were made and supported using the predicted spectra (ChemNMR software, Perkin Elmer, Beaconsfield, UK).
4
Characterization of Polymeric Colloidal Assemblies
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Concentrations of Gd3+ solutions were measured by inductively coupled plasma mass spectrometry (ICP-MS, XSeries II, Thermo Scientific, MA, USA).
The sizes (hydrodynamic diameters) of the PCAs were measured using a dynamic light scattering instrument (Zetasizer Nano ZS, Malvern Instruments, UK).
Gel permeation chromatography was performed on a Wyatt GPC/SEC-MALS (Wyatt Technology Corporation, Santa Barbara, USA) system equipped with a DAWN® HELEOS® II 18-angle static light scattering detector and an Optilab® T-rEXTM refractive index detector, and three columns in series (a MZ GPC-PRECOLUMN 50 × 8.0 mm MZ-Gel SDplus 100Å 10 μm, a 300 × 8.0 mm MZ-Gel SDplus 10E4Å 10 μm and a 300 × 8.0 mm MZ-Gel SDplus 100Å 10 μm) at 50 °C using DMF containing 50 mM LiBr as eluent at a flow rate of 0.80 mL min−1. Data were recorded and processed with ASTRA v6.0 (Wyatt Technology Corporation, Santa Barbara, USA) software.
The 1H-NMR spectra were recorded on a Bruker Avance DRX-400 NMR spectrometer at room temperature.
The sizes (hydrodynamic diameters) of the PCAs were measured using a dynamic light scattering instrument (Zetasizer Nano ZS, Malvern Instruments, UK).
Gel permeation chromatography was performed on a Wyatt GPC/SEC-MALS (Wyatt Technology Corporation, Santa Barbara, USA) system equipped with a DAWN® HELEOS® II 18-angle static light scattering detector and an Optilab® T-rEXTM refractive index detector, and three columns in series (a MZ GPC-PRECOLUMN 50 × 8.0 mm MZ-Gel SDplus 100Å 10 μm, a 300 × 8.0 mm MZ-Gel SDplus 10E4Å 10 μm and a 300 × 8.0 mm MZ-Gel SDplus 100Å 10 μm) at 50 °C using DMF containing 50 mM LiBr as eluent at a flow rate of 0.80 mL min−1. Data were recorded and processed with ASTRA v6.0 (Wyatt Technology Corporation, Santa Barbara, USA) software.
The 1H-NMR spectra were recorded on a Bruker Avance DRX-400 NMR spectrometer at room temperature.
5
Multimodal Characterization of Aggregates
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Fluorescence spectra were recorded on a Hitachi High-Technologies Corporation Tokyo Japan 5J2-0004 model F-7000 FL spectrofluorometer. UV-vis absorption was characterized by a UV-vis/NIR spectrophotometer (Shimadzu, Japan). The NMR spectra were recorded with a AVANCEDRX400 NMR spectrometer (Bruker, Germany) operated at 400/600 MHz. Electrospray ionization mass spectra were obtained with a High Performance 1100 Liquid Chromatography-Mass Spectrometer (Agilent Technologies, USA). The morphology and size of aggregates were characterized with Scanning Electron Microscopy (SEM) (Quanta, FEI) and a JEM 2100 high resolution transmission electron microscope (HRTEM, JEOL, Japan).
6
NMR and HRESIMS Analysis of Compounds
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The NMR spectra were obtained on a Bruker Avance DRX-400 NMR spectrometer operating at 400 MHz for 1 H and 100 MHz for 13 C in CD 3 OD using tetramethylsilane (TMS) as an internal standard. HRESIMS were carried out on an LTQ-Orbitrap XL. Column chromatography (CC) was carried out on medium preparative liquid chromatography (MPLC) (RP-18, 40~63 μm; Merck KGaA, Germany), Sephadex LH-20 (25-100 μm; GE Healthcare, Sweden) and normal silica gel (200-300 mesh; Qingdao Haiyang Chemical Co. Ltd., China).
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