8 research outputs found
2-(2,3,5,6-Tetramethylbenzylsulfanyl)pyridine N-oxide
In the title compound, C16H19NOS, the durene ring and the oxopyridyl ring form a dihedral angle of 82.26 (7)°. The crystal structure is stabilized by intermolecular C—H⋯O hydrogen bonds, weak C—H⋯π interactions and π–π interactions [centroid–centroid distance of 3.4432 (19) Å], together with intramolecular S⋯O [2.657 (2) Å] short contacts
catena-Poly[[aquasodium(I)]-μ-[2,2′-(disulfanediyl)bis(pyridine N-oxide)]-μ-(pyridine-2-thiolato 1-oxide)]
There are two monomeric units in the asymmetric unit of the polymeric title compound, [Na(C5H4NOS)(C10H8N2O2S2)(H2O)]n. The NaI ions are six coordinated by four O atoms, one S atom and one water molecule, forming a slightly distorted octahedral geometry. An intramolecular O—H⋯O hydrogen bond stabilizes the conformation of the molecule. The crystal packing is consolidated by intermolecular O—H⋯O, O—H⋯N and O—H⋯S hydrogen bonds, π–π interactions [with centroid–centroid distances of 3.587 (2) Å] together with weak C—H⋯π interactions. The molecules are linked into polymeric chains along the b-axis direction
2-(Mesitylmethylsulfanyl)pyridine N-oxide–18-crown-6 (2/1)
In the title compound, 2C15H17NOS·C12H24O6, the asymmetric unit consists of one N-oxide derivative and one-half of the 18-crown-6 ether, which lies on an inversion centre. In the crown ether, the O—C—C—O torsion angles indicate a gauche conformation of the ethyleneoxy units, while the C—O—C—C torsion angles indicate planarity of these segments. In the N-oxide unit, the dihedral angle between the pyridine and benzene rings is 85.88 (12)°. The crystal packing is stabilized by weak C—H⋯O hydrogen bonds and C—H⋯π interactions
Synthesis and Tribological Properties of WSe<sub>2</sub>Nanorods
<p>Abstract</p> <p>The WSe<sub>2</sub>nanorods were synthesized via solid-state reaction method and characterized by X-ray diffractometer, TEM, and HRTEM. The results indicated the WSe<sub>2</sub>compounds had rod-like structures with diameters of 10–50 nm and lengths of 100–400 nm, and the growth process of WSe<sub>2</sub>nanorods was discussed on the basis of the experimental facts. The tribological properties of WSe<sub>2</sub>nanorods as additives in HVI500 base oil were investigated by UMT-2 multispecimen tribotester. Under the determinate conditions, the friction coefficient of the base oil containing WSe<sub>2</sub>nanorods was lower than that of the base oil, and decreased with increasing mass fraction of WSe<sub>2</sub>nanorods when it was <7 wt.%. Moreover, the base oil with the additives was rather suited to high load and high rotating speed. A combination of rolling friction, sliding friction, and stable tribofilm on the rubbing surface could explain the good friction and wear properties of WSe<sub>2</sub>nanorods as additives.</p