To confirm the molecular structure of the prepared ILs, 1H-NMR spectroscopy (MR400 DD2 NMR, Agilent Technologies, Inc., Santa Clara, CA, USA) and Fourier transform infrared (FT-IR) spectroscopy (Nicolet iS20, Thermo Fisher Scientific Inc., Waltham, MA, USA) were used. A conductivity meter (Seven2CO pro, METTLER TOLEDO Inc., Columbus, OH, USA) was used to measure the conductivity. An osmometer (SEMI-MICRO OSMOMETER K-7400, KNAUER Wissenschaftliche Geräte GmbH Co., Berlin, Germany) was used to obtain the osmotic pressure of the IL aqueous solutions. An ultraviolet-visible (UV-Vis) spectrophotometer (EMC-11D-V, EMCLAB Instruments GmbH Co., Duisburg, Germany) fitted with a temperature controller (TC200P, Misung Scientific Co., Ltd., Yangju, Republic of Korea) was used to confirm the phase separation temperature of the ILs in water. The measurement of the contact angle was performed using a Krüss DSA10 (KRÜSS Scientific Instruments Inc., Hamburg, Germany) contact angle analyzer equipped with drop shape analysis software after deposing the water and aqueous solution of IL droplets on the FO membrane surface. The average volume of the droplets was 5 μL. The contact angles of each solution were determined four or more times.
Mr400 dd2 nmr
Manufactured by Agilent Technologies
Sourced in United States
The MR400 DD2 NMR is a nuclear magnetic resonance (NMR) spectrometer designed for analytical laboratory applications. It provides high-resolution NMR analysis capabilities for various sample types. The core function of the MR400 DD2 NMR is to analyze the chemical structure and properties of samples using NMR spectroscopy.
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2 protocols using mr400 dd2 nmr
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Characterization of Ionic Liquids
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Characterization of Ionic Liquids
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The structure analyses of the prepared ILs were performed by 1H NMR spectroscopy (MR400 DD2 NMR, Agilent Technologies, Inc.) and Fourier transform infrared (FT-IR) spectroscopy (Nicolet iS20, Thermo Fisher Scientific). The density of the IL was determined by calculating the ratio of its mass to its volume four or more times. To analyze the melting temperatures of the prepared ILs which are liquid at 25 ± 1 °C, a Q-10 (TA Instruments, Inc.) equipped with RCS40 (TA Instruments, Inc) was employed by differential scanning calorimetry (DSC) under a nitrogen atmosphere at the cooling rate and heating rate of 1 °C min−1 in the temperature range from −90 to 50 °C. The viscosity of the ILs was measured at 85 s−1 shear rate using a DV-III programmable rheometer (Brookfield) with rotating a metallic spindle. The conductivities of the IL aqueous solutions were measured using a conductivity meter (Seven2CO pro, METTLER TOLEDO). The osmolalities of the IL aqueous solutions were determined using an osmometer (SEMI-MICRO OSMOMETER K-7400, KNAUER). The phase transition temperatures of the IL aqueous solutions were determined using an ultraviolet-visible (UV-vis) spectrophotometer (EMC-11D-V, EMCLAB Instruments GmbH) and a temperature controller (TC200P, Misung Scientific Co., Ltd).
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