Advance 500 mhz nmr spectrometer

Powder X-ray diffraction (PXRD) patterns were recorded using a D8 Advance diffractometer equipped with a LYNXEYE detector (Bragg–Brentano geometry, Cu Kα radiation λ = 1.54056 Å). Thermal gravimetric analysis (TGA) was performed using a TA Instruments Q-500 thermal gravimetric analyzer under airflow with a temperature ramp of 5 °C min⁻¹. Fourier transform infrared (FT-IR) spectra were measured on a Bruker E400 FT-IR spectrometer using potassium bromide pellets. Low-pressure N₂ and CO₂ adsorption measurements were carried out on a Quantachrome Autosorb iQ volumetric gas adsorption analyzer. A liquid N₂ bath was used for measurements at 77 K. Helium was used as an estimation of dead space. Ultrahigh-purity-grade N₂, and He (99.999% purity) were used throughout adsorption experiments. Solution NMR spectra were recorded on a Bruker Advance-500 MHz NMR spectrometer. Scanning Electron Microscopy (SEM) images were performed on a JEOL JSM-75FCT. Gas chromatography (GC) analyses were performed using Agilent 6890 Series equipped with a flame ionization detector (FID) and a DB-5 column (length = 30 m, inner diameter = 320 μm, film thickness = 0.25 μm). GC-MS analyses were performed on Agilent GC System 7890 Series, equipped with a mass selective detector Agilent 5973N and a capillary DB-5MS column (length = 30 m, inner diameter = 320 μm, film thickness = 0.25 μm).