D max 2000 pc x ray diffractometer

The morphologies and structures of IrO₂ and Ir metal nanotubes were characterized by field-emission scanning electron microscopy (FE-SEM, JEOL JSM-6700F, Tokyo, Japan), high-resolution transmission electron microscopy (HRTEM; JEOL JEM-2100F, Tokyo, Japan), and high-resolution X-ray diffraction (XRD; Rigaku D/Max-2000/PC X-ray diffractometer using Cu Kα radiation, Tokyo, Japan). A thermal analysis of as-spun nanofibers was performed by thermogravimetric analysis and differential scanning calorimetry (TGA-DSC, Q600, TA Instruments, New Castle, DE, United States) to observe the combustion process of PVP. For this measurement, as-spun nanofibers were heated in air from room temperature to 700 °C, at a rate of 5 °C min⁻¹.

The single‐crystal X‐ray diffraction data of Cl‐OA, Br‐OA, mono‐I‐OA and orth‐I‐OA were collected at 298 K on the Rigaku Oxford diffractometer (Cu Kα, λ = 1.54184 Å). The structures were determined and refined by the direct methods with the full‐matrix least‐squares method based on F2 in the SHELXTL program package. All the non‐H atoms were anisotropically refined using all reflections with I > 2σ(I). The asymmetric unit and packing images were drawn by the DIAMOND. Variable‐temperature PXRD measurements were performed on a Rigaku D/MAX 2000 PC X‐ray diffractometer in the 2θ range of 5 to 50° with a step size of 0.02°. The infrared spectra were obtained on a Fourier Transform Infrared spectrometer (EQUINOX 55, Bruker, Germany). The samples were prepared by grinding the dried powder of mono‐ and orth‐I‐OA with KBr together, and then compressed into thin pellets. The ¹H nuclear magnetic resonance spectroscopy measurement was performed on the Bruker AVANCE NEO 300 MHz NMR spectrometer with 2 mg of the samples dissolved in 0.75 mL deuterated chloroform solvent.