Adsorption studies of vaporous benzene and toluene on a novel microporous graphitized biocarbon material (MGBC) were investigated in this study. The MGBC has high surface area (>2080 m 2 /g) and uniform microporosity (6.8−8.8 Å). The adsorbed amounts of benzene and toluene on the MGBC are ∼3−5 times higher than those on zeolites and some metalorganic framework (MOF) adsorbents (i.e., MIL-101, HKUST-1, and UIO-66) at 80 Pa. Results of the desorption activation energy and isosteric heat indicate a strong affinity of the MGBCs for benzene/toluene molecules, because of its uniform micropores size and graphitic N/C in MGBC structure. Moreover, the MGBC possesses a hydrophobic character, and thus leads to a preferential adsorption for toluene over H 2 O. Therefore, the MGBC shows a much higher working capacity for toluene than MIL-101(Cr) and commercial activated carbons (ACs) in moderate humidity.

The Mills reaction and cyclizationo fr eadily available 2-aminobenzyla lcohols and nitrosobenzenes using thionyl bromidep rovided 2H-indazoles in up to 88 %y ields. In the metal-free process, acetic acid played a crucial role for the both Mills reactiona nd cyclization. A brominated 2H-indazole could also be obtained through the one-pot sequence.Indazoles are au seful class of N-heteroaromatic compounds because they are crucial structural motifs of various biologically active compounds, [1] particularly,b ioisosteres for indoles and benzimidazoles. [1e] Al arge number of 2H-indazole derivatives have been demonstratedf or use as important biologically active compounds, [1c-h] such as niraparib (PARP inhibitor) [2] and liver Xr eceptor agonist, [3] in addition to fluorescent agents for cellular imaging in the field of chemical biology (Figure 1). [4] Because of the high utility of N-substituted indazoles, much attention has been devoted to establish novel and efficient strategies for their preparation. However,N -functionalization of indazoles often results in am ixture of 1H-a nd 2H-indazoles because the latter is thermodynamically disfavored in comparison with the former (energy difference between them is 2.3 kcal mol À1 ). [1e, 5, 6] Therefore, regioselective construction of the 2H-indazole skeleton remains ac hallenging task in organic synthesis. [4a, 7] Recently,t here have been af ew remarkable reports on the one-pot syntheses of 2H-indazoles. The synthesis involves a copper-catalyzedt hree-component reaction (Scheme 1a), [7a,b] Chem. Eur.

Based on the phenomenon of serious tensile-shear failure of bolts and cables, domestic and foreign scholars’ research on the mechanical properties of bolts and cables has gradually changed from pure tensile to tensile-shear performance. To reduce the long-term bolt and cable breakage accidents in deep soft rock tunnels in coal mines, we independently developed a new type of support material—anchor cable with C-shaped tube and a corresponding tensile-shear test system. The system parameters are set through theoretical derivation, and the three main structures of the test system are designed with ANSYS: shear box, vertical loading reaction frame, and horizontal loading reaction frame. The numerical simulation results show that when the thickness of the shear box steel plate is 20 mm, the maximum strain is about 2.7‰. When the diameters of the vertical column and the horizontal bar are 220 mm and 80 mm, respectively, the maximum strains of the column and the horizontal bar are about 0.17‰ and 0.04‰, respectively. The strength and deformation of the three main structures meet the design requirements. The developed test system was tested on-site. The test results show that the system can perform tensile test and two different modes of the double shear test. The main structure has no obvious deformation during the test, meeting the design requirements. In addition, the rational design of the shear box eliminates the error caused by the shear block. The results show that the shear resistance of anchor cable with C-shaped tube is better than that of pure anchor cables. The research results can provide a reference for developing other similar test systems.