All melting points were measured on a hot stage apparatus (Electro thermal, Essex, UK) and are uncorrected. 1H NMR (300 MHz) and 13C NMR (75 MHz) spectra were recorded on a Bruker 300 Fourier transform spectrometer, tetramethylsilane was used as an internal standard. Chemical shifts (δ) and coupling constants (J) are reported in ppm and Hz, respectively. Mass spectra were recorded on an Agilent spectrometer (7000-3Q mass spectrometer at an electron impact mode with an ionization voltage of 70 eV). Infrared spectra were obtained using Bruker Tensor 27 spectrometer as KBR disks. Melting points were determined with a MEL-TEMP model 1202.
300 fourier transform spectrometer
Manufactured by Bruker
The Bruker 300 Fourier transform spectrometer is a laboratory instrument that utilizes Fourier transform infrared (FTIR) technology to analyze and identify the molecular composition of samples. The device measures the absorption or emission of infrared radiation by the sample, providing detailed information about its chemical structure and functional groups.
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3 protocols using 300 fourier transform spectrometer
1
Spectroscopic Analysis of Organic Compounds
2
Comprehensive Polymer Characterization
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The FT‐IR spectra of the polymers were recorded on a Nicolet 5700 spectrometer within 500–4000 cm−1 with a resolution of 4 cm−1 using KBr plates. The 1H‐NMR spectra were recorded on a Bruker 300 Fourier transform spectrometer at 300.13 and 100.62 MHz in CDCl3 and by using tetramethylsilane (TMS) as the internal standard. The average molecular weight (Mw) and distribution (Mw/Mn) of the polymers were determined using a Viscotek TDA 302 GPC instrument with THF as the mobile phase with a flow rate of 1.0 ml/min at 30 °C, after calibration with polystyrene standards. Differential scanning calorimetry (DSC) measurements were performed with a Mettler Toledo (Greifensee, Switzerland) DSC instrument under a nitrogen atmosphere at a heating rate of 10 °C/min from −100 to 100 °C. The thermo‐gravimetric analysis (TGA) was carried out in a nitrogen atmosphere on a TA Q500 TGA analyzer. The samples were heated from 30 to 600 °C at a rate of 10 °C/min.
3
Characterization of Organic Compounds
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Melting points were determined with a Thermo Scientific Electrothermal digital apparatus (Thermo Fisher Scientific Inc.). 1H NMR (300 MHz) and 13C NMR (100 MHz) spectra were recorded on a Bruker 300 Fourier transform spectrometer; the chemical shifts are expressed in d (ppm) downfield from tetramethylsilane. Infrared (IR) spectra were recorded on the Perkin Elmer Spectrum RXI FTIR spectrophotometer in the KBr phase. Mass spectra were carried out using Agilent 7000 triple quadrupole mass spectrometer at an electron impact mode with an ionization voltage of 70 eV.Chemicals used were supplied from Sigma-Aldrich, Fluka, and Merck chemical companies. TLC was performed on the glass-backed silica gel sheets (Silica Gel 60 GF254) and visualized under UV light (254 nm).
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