Nuclear magnetic resonance (NMR) spectra [48 (link)] H and 13C) were recorded in dimethyl sulfoxide-d6 (DMSO-d6) at ambient temperature using a Varian AS 400+ Mercury FT NMR spectrometer (400 MHz). Attenuated total reflectance-Fourier-transform infrared (ATR – FTIR) spectroscopy (Perkin Elmer 100 FTIR with PIKE Gladi ATR accessory) was performed at room temperature. The test wavenumber range of FTIR spectra was 400–4000 cm−1. Column chromatography and thin-layer chromatography were performed on silica gel G-60 (Merck 7734) and precoated aluminium plates (Merck 5554), respectively.
Thermogravimetric analysis (TGA) and derivative TG (DTG) analysis were performed on a Perkin Elmer Diamond TA/TGA with heating rates of 5°C/min, 10°C/min, 15°C/min and 20°C/min under N2 atmosphere. The temperature ranged from 30°C and 600°C. The weight loss (TG curve) and its first derivative (DTG curve) were recorded simultaneously as a function of temperature.
Molecular weights were determined using a gel permeation chromatography (GPC) instrument equipped with a Waters Styragel column (HR series 2, 3, 5E) using tetrahydrofuran as the eluent at a flow rate of 1 mL/min and a Waters 410 differential refractometer detector.
Thermogravimetric analysis (TGA) and derivative TG (DTG) analysis were performed on a Perkin Elmer Diamond TA/TGA with heating rates of 5°C/min, 10°C/min, 15°C/min and 20°C/min under N2 atmosphere. The temperature ranged from 30°C and 600°C. The weight loss (TG curve) and its first derivative (DTG curve) were recorded simultaneously as a function of temperature.
Molecular weights were determined using a gel permeation chromatography (GPC) instrument equipped with a Waters Styragel column (HR series 2, 3, 5E) using tetrahydrofuran as the eluent at a flow rate of 1 mL/min and a Waters 410 differential refractometer detector.