Tensor 2 fourier transform infrared ftir spectrometer

We used a JEM-2100F microscope (JEOL, Japan) to record transmission electron microscopy (TEM) images of ZIM and the ZIMH NPs. The dynamic light scattering (DLS) experiments of ZIMH were carried out with a Nano-Zetasizer (Malvern Instruments Ltd.). A UV-Vis-NIR spectrometer (UV-6100, MAPADA) was used to obtain the absorption spectra of ZIF-8, MnPc, IR820 and ZIM. Thermogravimetric analysis (Setsys Evolution TGA 16/18) was performed at a heating rate of 5 °C min⁻¹ under a N₂ atmosphere. Infrared spectroscopy was recorded on a TENSOR II Fourier-transform infrared (FTIR) spectrometer (Bruker, Germany).

The low angle X-ray diffraction (XRD) patterns were recorded on a LabX-6000 X-ray diffract meter (Shimadzu, Japan) with Cu/Kα radiation (λ = 0.154056 nm) operating at 40 kV and 50 mA. N₂ adsorption/desorption isotherms were obtained by a SA 3100 surface area and pore size analyzer (Beckman Coulter, U.S.A) at 77 K. Before the measurements, each sample was pretreated under vacuum at 120 °C for 10 h. The specific surface area was calculated by using Brunauer–Emmett–Teller (BET) method at a relative pressure (P_S/P₀) range of 0.05–0.2. The pore size distribution was obtained from the desorption branch of isotherm through the Barrett–Joyner–Halenda (BJH) model. And the total pore volume was determined on the basis of the volume of liquid nitrogen adsorbed at P_S/P₀ = 0.98. The morphology was determined by a Tecnai G² F30 transmission electron microscope (TEM, FEI, U.S.A). The surface functionalities were performed on a Tensor II Fourier transform infrared (FTIR) spectrometer (Bruker Optics, German) at a resolution of 4 cm⁻¹ over the wave number range of 400–4000 cm⁻¹. The surface chemical species was examined on a ESCALAB 250Xi X-ray photoelectron spectroscope (XPS, Thermo Fisher Scientific, U.S.A) with Al/Kα radiation (hν = 1486.6 eV).