12 research outputs found
8-Hydroxy-8-phenyl-2,3,7,8-tetrahydro-6H-1,4-dioxino[2,3-f]isoindol-6-one
In the title compound, C16H13NO4, the indole system is essentially planar, whereas the dioxane ring adopts a twist conformation. The molecules are linked into chains by —O— H⋯O=C— hydrogen bonds and these chains are linked into rods by means of N—H⋯O hydrogen bonds. Exept for weak C—H⋯O interactions between the rods, no other intermolecular contacts of interest are present
rac-12,14-Dicyclopropyl-5,8,13,18,21-pentaoxapentacyclo[13.8.0.02,11.04,9.017,22]tricosa-1(15),2(11),3,9(10),16,22(23)-hexaene
The molecule of the title compound, C24H24O5, has crystallographic twofold symmetry, with the central O atom lying on the rotation axis. The dihedral angle between the best planes of the benzene rings fused to the oxepine fragment is 38.5 (1)°. The dioxine ring adopts a twist form with the ethylene group C atoms deviating by 0.472 (5) and −0.248 (6) Å from the plane defined by the remaining ring atoms
A variational problem of the optimization of measurements in identification and control algorithms
Purification of tellurium through thermal decomposition of plasma prepared tellurium hydride
Structural and optical properties of arsenic sulfide films synthesized by a novel PECVD-based approach
Corrigendum to “A novel plasma-based method for synthesis of As–Se–Te films: Impact of plasma parameters on the structure, composition, and optical properties” [Superlattice Microstruct. 128 (2019) 334–341]
Morphology Effect of Zinc Oxide Nanoparticles on the Gas Separation Performance of Polyurethane Mixed Matrix Membranes for CO2 Recovery from CH4, O2, and N2
The effect of the morphology and content of zinc oxide nanoparticles (ZnO-NPs) on the physicochemical, mechanical, and gas transport properties of the polyurethane (PU) mixed matrix membranes (MMMs) with respect to CO2 recovery from CH4, O2, and N2 was studied. The MMMs based on PU with spherical and rod-shaped ZnO-NPs at various loadings, namely, 0.05, 0.1, 0.5, 1, and 2 wt. %, were prepared with membrane density control and studied using AFM, wettability measurements, surface free energy calculation, gas separation and mechanical testing. To evaluate the resistance of the ZnO-NPs to agglomeration in the polymer solutions, zeta potential was determined. The ZnO-NPs with average cross sectional size of 30 nm were obtained by plasma-enhanced chemical vapor deposition (PECVD) from elemental high-purity zinc in a zinc-oxygen-hydrogen plasma-forming gas mixture. It was established that the spherical ZnO-NPs are promising to improve the gas performance of PU-based MMMs for CO2 recovery from natural gas, while the rod-shaped NPs better demonstrate their potential in capturing CO2 in flue gases