以邻苯二酚和丙酮为原料,合成出四羟基化合物5,5',6,6'-四羟基-3,3,3',3'-四甲基-1,1'-螺旋双茚满,再与四氟对苯二腈发生聚合反应得到自具微孔聚合物PIM-1.然后,分别在300℃,350℃和400℃对PIM-1膜材料进行热处理得到热致刚性膜材料.利用核磁共振仪(NMR),凝胶渗透色谱仪(GPC),红外光谱仪(FTIR),热...
利用核磁共振仪( NMR )、凝胶渗透色谱仪( GPC )、红外光谱仪( FTIR )、热重分析仪( TGA )、示差扫描量热仪( DSC )、 X 射 线衍射仪( XRD )和扫描电镜( SEM )对所合成的四幾基化合物、 PIM -1聚合物及热致刚性膜材料的结构和性能进行表征,并对其气 体分离性能进行了测试。研究表明,所合成 PIM -...
The obtained compounds were characterized using 1H NMR, 13C NMR, HRMS, and FTIR. Through computer-assisted screening, antitumor activity testing, and Pim-1 inhibitory activity testing, most of the compounds exhibited significant inhibitory activity against liver cancer cell lines. Among them, compound...
3.3. FTIR, Raman and XPS The surface chemistry of the initial h-BN material and the exfoliated BNNS were compared by FT-IR, Raman spectroscopy and XPS. Both samples have similar FT-IR, Raman and XPS spectra. Fig. 3 a shows similar strong and broad peaks at ~ 1370 cm-1 and ~ 820 ...
Successfully surface-modified GOs were characterized by Fourier transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The effect of FGO loading on MMM morphology and performance was investigated by varying...
Various techniques including FTIR, SEM, EDS, NMR, GPC, contact angle goniometry, N-2 absorption/ desorption, pervaporation measurements and swelling tests were used to characterize and evaluate the properties of PIMs and membranes. Compared with the pristine PDMS membrane, the prepared PIM-1/PDMS ...
Different concentrations (1鈥 5 wt%) of MXene were incorporated into PIM-1, and the resulting materials were characterized to 1H NMR, FTIR, XRD, TGA, nitrogen adsorption, SEM and EDS to assess their physicochemical properties. The research focused on evaluating the gas separation performance, ...
Crosslinking with polyethylenimine has been realized with the use of two methods: by keeping PIM-1 films involving 4–20 wt % polyethylenimine in a poly(ethylene glycol glycidyl ether) solution or by heating. The obtained crosslinked samples have been examined using FTIR spectroscopy. It has been...
The obtained compounds were characterized using 1 H NMR, 13 C NMR, HRMS, and FTIR. Through computer-assisted screening, antitumor activity testing, and Pim-1 inhibitory activity testing, most of the compounds exhibited significant inhibitory activity against liver cancer cell lines. Among them, ...
Characterization techniques, including FTIR, 1 H NMR, UV鈥揤is spectroscopy, wide-angle X-ray diffraction (WAXD) and wide-angle X-ray scattering (WAXS), confirm the structural changes in the polymer and reveal contraction in interchain spacing due to hydrogen bonding. This study provides insights...