Showing papers on "Inorganic compound published in 2021"
TL;DR: In this article, an inorganic compound [{Co(H2O)6}2+{Na4V10O28}2-] (1) was reported, in which the polyanionic sheets of decavanadate play the role of a diamagnetic matrix that reduces the dipolar-dipolar and spin-spin interactions between [Co[H 2O]6]-2 units to suppress the fast tunnelling of magnetization.
Abstract: In this work, we report an inorganic compound [{Co(H2O)6}2+{Na4V10O28}2-] (1) in which the polyanionic sheets of decavanadate play the role of a diamagnetic matrix that reduces the dipolar-dipolar and spin-spin interactions between [Co(H2O)6]+2 units to suppress the fast tunnelling of magnetization. Structural analysis reveals that each [Co(H2O)6]+2 complex is surrounded by four decavanadates and separated by a large internuclear distance (9 A). It was also found that the adjacent decavanadates are connected via sodium ions and form a 2D sheet of the inorganic layer in which the [Co(H2O)6]2+ ions are present in between two layers. Detailed dc (direct current) and ac (alternating current) magnetic measurements disclose the presence of large easy-axis anisotropy (D = -102 cm-1) and field induced slow magnetic relaxation behaviour with a spin reversal barrier of Ueff = 50 K. Additionally, the temperature dependence of the relaxation time reveals that the Raman and QTM processes mainly play an important role rather than the thermally activated Orbach process in the overall relaxation dynamics of the studied compound. To analyse the electronic structure and magnetic properties of compound 1, ab initio calculations were performed which further support the experimental observations. Notably, the Ueff value of 1 represents the highest energy barrier reported for POM based SMMs with transition metal ions to date.
12 citations
Patent•
23 Feb 2021TL;DR: In this paper, a light-blocking pigment, a resin, a polymerizable compound which is a low-molecular-weight compound containing an ethylenically unsaturated group, and a polymerization initiator are provided.
Abstract: Provided is a light-blocking composition having excellent long-term temporal stability. Also provided are a cured film, a color filter, a light-blocking film, a solid-state imaging element, and an image display device. This light-blocking composition contains a light-blocking pigment, a resin, a polymerizable compound which is a low-molecular-weight compound containing an ethylenically unsaturated group, and a polymerization initiator. The light-blocking pigment includes inorganic particles, and an inorganic compound covering the inorganic particles. The inorganic particles contain at least one nitrogen-containing metal compound selected from the group consisting of zirconium nitride, zirconium oxynitride, vanadium nitride, vanadium oxynitride, niobium nitride, and niobium oxynitride. The inorganic compound contains a silicon atom. The atomicity ratio of the total contained amount of metal atoms selected from the group consisting of a zirconium atom, a vanadium atom, and a niobium atom with respect to the contained amount of silicon atoms, in the surface of the light-blocking pigment, is more than 1.0 as measured by X-ray photoelectron spectroscopic analysis.
Patent•
22 Apr 2021
TL;DR: In this article, the problem of improving wear resistance and seizure resistance in a copper-alloy sliding material was addressed, where the authors proposed a method to improve wear resistance in sliding materials.
Abstract: The present invention addresses the problem of improving wear resistance and seizure resistance in a copper-alloy sliding material. Provided is a copper-alloy sliding material containing 0.5-12.0 mass% of Sn, 2.0-8.0 mass% of Bi, and 1.0-5.0 vol% of an inorganic compound, with the remainder comprising Cu and inevitable impurities, wherein the inorganic compound comprises a first inorganic compound having an average particle size of 0.5-3.0 μm and a second inorganic compound having an average particle size of 4.0-20.0 μm, and the value obtained by dividing the volume fraction of the first inorganic compound by the volume fraction of the second inorganic compound is 0.1-1.0.
Patent•
23 Mar 2021
TL;DR: In this paper, a process for manufacturing 2D inorganic compound platelets is described, where the process consists of preparing a first stock containing a 3D layered compound material dispersed in a liquid medium, injecting the first stock into a continuous reactor having a vortex flow, and operating the continuous reactor to form a reaction product suspension containing 2D compound platelet dispersed in the liquid medium.
Abstract: Provided is a process for manufacturing 2D inorganic compound platelets, the process comprising (a) preparing a first stock containing a 3D layered inorganic compound material dispersed in a liquid medium, (h) injecting the first stock into a continuous reactor having a vortex flow, (c) operating the continuous reactor to form a reaction product suspension containing 2D inorganic compound platelets dispersed in the liquid medium, and (d) separating and recovering said 2D inorganic compound platelets from said product suspension. The product suspension may be directed to flow back to the continuous director for further processing for at least another pass through the reactor, prior to step (d). The continuous reactor is preferably a Couette-Taylor reactor.