Equinox 55 fourier transform infrared spectrometer

¹H and ¹³C-NMR spectra were measured on a Bruker Avance DRX600 spectrometer (Bruker, Billerica, MA, USA). Spot absorption spectra were obtained by use of a DXRxi Raman Imaging Microscope (Thermo Fisher Scientific, Waltham, MA, USA) with an excitation wavelength of 532 nm and 50 μm confocal pinhole diaphragm. Fourier transform infrared spectroscopy (FT-IR) was measured on a Bruker Equinox 55 Fourier transform infrared spectrometer (Bruker, Billerica, MA, USA). Scanning electron microscope (SEM) images were carried out using a HITACHI S-4300 scanning electron microscope (Hitachi, Tokyo, Japan). Thermo gravimetric analysis (TGA) was carried out with a Pyris-Diamond TGA (PerkinElmer, Boston, MA, USA). Ultra high performance liquid chromatography (UHPLC) was carried out with an American Waters Acquity UHPLC Class (Waters, Milford, MA, USA).

A Shanghai Hualong WHY-300/10 microcomputer experimental press was used to test the compressive strengths of the test samples. The reference specification was GB/T 17671-1999, the “Test Method for Strength of Cement Glue Sand.” Qualitative analysis of the original sample and hydration products of the CNS was conducted using an X-ray diffractometer (XRD; D8 Advance AXS, Brooklyn, Germany) with a Cu target, a working voltage of 40 kV, a working current of 40 mA, a scanning range of 5–80° (2θ), a scanning step size of 0.02°, and a step time of 0.5 s. For quantitative analysis, the step time was adjusted to 1 s. The instrument used for the analysis of chemical bonds and functional groups was a Bruker EQUINOX55 Fourier-transform infrared spectrometer from Germany, which had a spectral range of 400–4000 cm⁻¹. A NOVA Nano SEM 450 from the FEI Company in the United States was used for the analysis of the micro-morphologies of the samples. The X-ray fluorescence spectrometer was an XRF-1840 model from Japan. The instrument used for the alkaline dissolution of the glass phase of CNS was a plasma emission spectrometer (Optima2000DV, Waltham, MA, USA).

All chemicals and solvents were obtained from Aladdin Bio-Chem Technology CO. Ltd (Shanghai, China) and used without further purification. 1,2,4-Oxadiazole-3-carboxyamidoxime (1) was supplied by Xi'an Modern chemistry Research Institute. ¹³C and ¹H NMR spectra were recorded at 298 K on an AV 500 NMR spectrometer (Bruker, Switzerland). Infrared spectra were measured by an EQUINOX 55 Fourier transform infrared spectrometer (Bruker, Germany). Elemental analyses were obtained on the vario EL cube elemental analyzer (Elmentar, Germany). The thermal analysis experiments were recorded on a model TG-DSC STA 499 F3 instrument (NETZSCH, Germany) with dynamic nitrogen atmosphere at a heating rate of 10°C min⁻¹. Single crystal X-ray experiment was carried out on a Bruker Apex II CCD diffractometer equipped with graphite monochromatized Mo Kα radiation (λ = 0.71073 Å) using ω and φ scan mode. Structures were solved by the direct method using SHELXTL and refined by means of full-matrix least-squares procedures on F2 with the programs SHELXL-97. Detonation velocity and detonation pressure data were calculated by program package EXPLO5 (version 6.02). The sensitivity data were determined according to BAM standards by BAM drophammer and BAM friction tester (NATO, 1999 , 2002 ).
CCDC number of compound 4 • H₂O and compound 6 is 1958390 and 1958391, respectively.