Optical rotations were measured at 25 °C with a JASCO Dip-370 digital polarimeter using MeOH as solvent. UV spectra were recorded in MeOH using a Shimadzu UV-1601 UV–Vis spectrometer. ECD spectra were recorded in MeOH on a Jasco 810 spectrometer at 25 °C, using a quartz cell with 1.0 mm optical path length. The 1D and 2D NMR spectra were recorded on a Bruker Avance III 400 NMR instrument at 400 MHz for 1H NMR and 100 MHz for 13C NMR. Chemical shift values (δ) are given in parts per million (ppm), and the coupling constants are in Hz. Low-resolution and high-resolution MS were recorded on Shimadzu LCMS-QP8000α and Agilent G6224A TOF mass spectrometers, respectively. Normal phase column chromatography was performed using Baker silica gel 40 μm flash chromatography packing (J.T. Baker) and reversed phase chromatography was carried out using BAKERBOND C18 40 μm preparative LC packing (J.T. Baker). Analytical and preparative thin-layer chromatography (TLC) were performed on pre-coated plates (0.20 mm thickness) of silica gel 60 F254 (Merck) and RP-18 F254S (Merck). The HPLC purifications were carried out on a Phenomenex Luna 5 μm C18 column (10 × 250 mm) with a Waters Delta Prep system consisting of a PDA 996 detector. The MM2 energy minimizations of possible conformations of compounds were performed using Chem3D 15.0 from PerkinElmer Inc.
Avance 3 400 nmr instrument
Manufactured by Bruker
Sourced in United States
The AVANCE III 400 NMR instrument is a nuclear magnetic resonance spectrometer produced by Bruker. It operates at a frequency of 400 MHz and is designed to perform various NMR experiments for analytical and research purposes.
Automatically generated - may contain errors
Lab products found in correlation
810 spectrometer, by Jasco (1 mentions)
Uv 1601 uv vis spectrometer, by Shimadzu (1 mentions)
Chem3d 15, by PerkinElmer (1 mentions)
Dip 370 digital, by Jasco (1 mentions)
Delta prep system, by Waters Corporation (1 mentions)
Rp 18 f254, by Merck Group (1 mentions)
Spectrum two ft ir spectrometer, by PerkinElmer (1 mentions)
3 protocols using avance 3 400 nmr instrument
1
Spectroscopic Characterization of Natural Compounds
2
NMR Spectroscopy of Ionic Liquid-Based Catalyst
Check if the same lab product or an alternative is used in the 5 most similar protocols
1H NMR spectra were recorded using a Bruker AVANCE III 400 NMR instrument. Chemical shifts (δ) are given in ppm and referred as the internal standard to the residual solvent (CDCl3: 7.26 ppm). The data are listed as follows for [Bmim][Cl]–AlCl3, 1H NMR (CDCl3-d, d, ppm): δ 8.59 (s, 2H), 8.35 (s, 1H), 8.18 (s, 1H), 7.28 (s, 11H), 7.18 (s, 2H), 4.23 (t, J = 7.5 Hz, 5H), 4.04 (d, J = 15.6 Hz, 10H), 3.79 (s, 3H), 1.90 (q, J = 7.5 Hz, 5H), 1.42 (q, J = 7.5 Hz, 5H), 1.25 (s, 3H), 1.21 (s, 2H), 1.00 (t, J = 7.3 Hz, 7H), 0.78–0.73 (m, 5H), 0.44 (s, 4H).
+ Expand
1H NMR spectra were recorded using a Bruker AVANCE III 400 NMR instrument. Chemical shifts (δ) are given in ppm and referred as the internal standard to the residual solvent (CDCl3: 7.26 ppm). The data are listed as follows for [Bmim][Cl]–AlCl3, 1H NMR (CDCl3-d, d, ppm): δ 8.59 (s, 2H), 8.35 (s, 1H), 8.18 (s, 1H), 7.28 (s, 11H), 7.18 (s, 2H), 4.23 (t, J = 7.5 Hz, 5H), 4.04 (d, J = 15.6 Hz, 10H), 3.79 (s, 3H), 1.90 (q, J = 7.5 Hz, 5H), 1.42 (q, J = 7.5 Hz, 5H), 1.25 (s, 3H), 1.21 (s, 2H), 1.00 (t, J = 7.3 Hz, 7H), 0.78–0.73 (m, 5H), 0.44 (s, 4H).
3
Synthesis and Characterization of PHEI-PU Series
Check if the same lab product or an alternative is used in the 5 most similar protocols
+ Expand
To confirm the synthesis of the PHEI-PU series, measurements were made using gel permeation chromatography on a FUTECS NP4000 instrument (Futec, Seoul, Republic of Korea). Tetrahydrofuran (HPLC grade, Duksan, Ansan, Republic of Korea) was used as the eluent, with a flow rate of 1.0 mL/min, temperature of 40 °C, and concentration of 0.5 wt%. Polystyrene (17,500, 50,000, 128,900, 370,000, and 510,000 Mp) was used as the standard.
The viscosity of the PHEI-PU series was measured using the small sample adapter SSA18/13R of the BROOK FIELD DVE model (BROOK FIELD Co., Ltd., Toronto, ON, Canada) with a viscosity range of 3–10,000 cP (MPa·s) and measuring volume of 6.67 mL. The PHEI-PU series was dissolved in ECA at 30 wt%, and the viscosity was measured at 25 °C.
Fourier transform infrared spectroscopy (FTIR; Spectrum two FTIR spectrometer, PerkinElmer, Waltham, MA, USA) was used to confirm the synthesis of PU and the presence of unreacted materials. The transmittance was measured in the wavelength range of 4000–650 cm−1 using the attenuated total reflection method.
Hydrogen nuclear magnetic resonance (1H-NMR) spectroscopy was performed using an AVANCE III 400 NMR instrument (Bruker, MA, USA) with CDCl3 as the solvent at a frequency range and sensitivity of 400 MHz and 220:1, respectively.
The viscosity of the PHEI-PU series was measured using the small sample adapter SSA18/13R of the BROOK FIELD DVE model (BROOK FIELD Co., Ltd., Toronto, ON, Canada) with a viscosity range of 3–10,000 cP (MPa·s) and measuring volume of 6.67 mL. The PHEI-PU series was dissolved in ECA at 30 wt%, and the viscosity was measured at 25 °C.
Fourier transform infrared spectroscopy (FTIR; Spectrum two FTIR spectrometer, PerkinElmer, Waltham, MA, USA) was used to confirm the synthesis of PU and the presence of unreacted materials. The transmittance was measured in the wavelength range of 4000–650 cm−1 using the attenuated total reflection method.
Hydrogen nuclear magnetic resonance (1H-NMR) spectroscopy was performed using an AVANCE III 400 NMR instrument (Bruker, MA, USA) with CDCl3 as the solvent at a frequency range and sensitivity of 400 MHz and 220:1, respectively.
About PubCompare
Our mission is to provide scientists with the largest repository of trustworthy protocols and intelligent analytical tools, thereby offering them extensive information to design robust protocols aimed at minimizing the risk of failures.
We believe that the most crucial aspect is to grant scientists access to a wide range of reliable sources and new useful tools that surpass human capabilities.
However, we trust in allowing scientists to determine how to construct their own protocols based on this information, as they are the experts in their field.
Ready to get started?
Sign up for free.
Registration takes 20 seconds.
Available from any computer
No download required
Revolutionizing how scientists
search and build protocols!