In this work, Ti2AlN porous ceramics was made by the organic foam impregnation. High-purity Ti2AlN powder was sintered at 1300 °C for 2 h of Ti/1.1Al/TiN in stoichiometric proportion. The slurry solids of organic foam impregnation method was 60 %, using 2 % polyacrylamide as dispersant, 0.5 % polyvinyl alcohol as a binder and 0.5 % ethanol as defoaming. The polyurethane sponge was pre-treatment for 6 h with 15 % NaOH solution and soak for 24 h with 4 % of carboxymethyl cellulose (CMC) solution. Through the pre-treatment, the polyurethane sponge hangs pulp quantity is higher, and the percentage of plugged hole is the lowest. The Ti2AlN porous ceramics is relatively uniform open holes with three-dimensional skeleton structure. This study can generate to the studies of the preparation of the mesh structure products and the preparation of ceramic matrix composites by pressureless infiltration process.
Based on an asymmetric 1,2,4‐benzenetricarboxylic acid (H3btc) and 2,2′‐bipyridine (bpy), a new CuII complex, Cu2(H2btc)4(bpy)2·8H2O (1), was synthesized and structurally characterized by single‐crystal X‐ray diffraction, hirshfeld surface (HS) analysis, IR spectroscopy, powder X‐ray analysis, thermal gravimetry analysis (TGA), magnetic susceptibility, EPR measurement, and UV/Vis spectrometry. Complex 1 shows a dinuclear copper structure. The CuII of each dinuclear moiety are in a slightly distorted square‐pyramidal environments. Magnetic susceptibility of 1 shows a ferromagnetic coupling between both metal atoms. The interaction of 1 with bovine serum albumin (BSA) is investigated using UV/Vis, fluorescence spectroscopic methods. The CuII complex shows strong binding propensity in albumin binding study.
The asymmetric unit of the title compound, (C15H25N2O2)[FeCl4], contains a tetrachloridoferrate(III) anion and a oxymatrinium cation [oxymatrine is (4R,7aS,13aR,13bR,13cS)-dodecahydro-1H,5H,10H-dipyrido[2,1-f:3′,2′,1′-ij][1,6]naphthyridin-10-one 4-oxide]. The conformation of oxymatrine is similar to that of matrine with one ring having a half-chair conformation, while the others have chair conformations. Chiral chains of cations along the c axis are formed by O—H⋯O hydrogen bonds.
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