Smart apex ccd

Using the UV–Vis spectrophotometer model Shimadzu UV-1800, Germany absorption spectra were recorded. By using Fourier transform infrared spectroscopy (FTIR, MX 300, Mohrsville, PA, USA), the functional groups were studied over wavenumber range of 4000–500 cm⁻¹. Furthermore, FTIR also detects C=C groups of carbon and vibrations of CeO₂, which are related to bulk material rather than to functional groups. The surface morphology and size of the nanocomposite were examined by using a scanning electron microscope (SEM, JSM-IT 100 Jeol, Tokyo, Japan), and by using EDX (equipped with the SEM) the elemental analysis was performed. The accelerated voltage of 20 kV was applied to take images at different magnifications. The crystal structure of the Co/CeO₂/C/IL was studied by using powder X-ray diffraction (XRD) and a Bruker Smart Apex CCD (Billerica, MA, USA) over the 2θ range of 20–80°. The Raman spectrum at room temperature was recorded by using the portable Raman instrument attached to a microscope (i-Raman B&W TEK Inc, Plainsboro, NJ, USA, 20× objectives).

All the chemicals and reagents were purchased from a commercial source and used as received without further purification. ¹H and ¹³C NMR spectra were measured on a Bruker AV 500 (500 MHz) spectrometer in CD₂Cl₂ with tetramethylsilane (TMS, δ = 0). High-resolution mass spectra (HRMS) were recorded on a GCT premier CAB048 mass spectrometer operating in MALDI-TOF mode. Single-crystal X-ray diffraction intensity data were collected on a Bruker–Nonices Smart Apex CCD diffractometer with graphite monochromated MoKα radiation. Processing of the intensity data was carried out using the SAINT and SADABS routines, and the structure and refinement were conducted using the SHELTL suite of X-ray programs (version 6.10). UV–vis absorption spectrum was measured on a Shimadzu UV-2600 spectrophotometer. PL spectra were recorded on a Horiba Fluoromax-4 spectrofluorometer. Solution fluorescence quantum yields were measured using a Hamamatsu absolute PL quantum yield spectrometer C11347 Quantaurus_QY. High-performance liquid chromatography spectra were measured using Waters alliance e2695 separation module.

High-quality single crystal of Ba₂NaOsO₆ with a truncated octahedral morphology were grown from a molten hydroxide flux, as described elsewhere12 (link)17 . Crystal quality was checked by X-ray diffraction, using a Bruker Smart Apex CCD (charge-coupled device) diffractometer, which indicated that the room temperature structure belongs to the Fm m space group12 (link). NMR measurements were performed for a single crystal with a volume of ∼1 mm³. The quality of the sample was confirmed by the sharpness of ²³Na NMR spectra both in the high-temperature PM state and low-temperature quadrupolar split spectra.
The sample was both zero-field and field-cooled. We did not detect any influence of the samples cooling history on the NMR spectra. Nevertheless for consistency, all results presented in the paper were obtain in field-cooled conditions. The sample was mounted to one of the crystal faces and rotated with respect to the applied field about an axis using a single axis goniometer. The rotation angle, for applied fields below 9 T, was inferred from the signal of two perpendicularly positioned Hall sensors. In addition, to ensure that data was taken with no external pressure applied, the mounted sample was placed in a solenoid coil with cross sectional area significantly larger than that of the sample. In this way, no pressure is exerted on the sample as coil contracts on cooling.

Single-crystal X-ray structural analysis of 1 in α/α′ coexisting state was performed at 298 K on a Bruker Smart APEX CCD (charge-coupled device) area diffractometer (Bruker AXS K.K.) with a nitrogen-flow temperature controller using graphite-monochromated Mo Kα radiation (λ=0.71073 Å). Empirical absorption corrections were applied using the SADABS programme. The structure was solved by direct methods (SHELXS-97) and refined by full-matrix least-squares calculations on F² (SHELXL-97) using the SHELX TL programme package. Non-hydrogen atoms were refined anisotropically; hydrogen atoms were fixed at calculated positions by riding model approximation.