The only magnetic grade CrCl3 vdW crystals in the commercial market. Our customers knows that slim amount of defects and magnetic impurities are sufficient to mask the observation of exotic magnetic behavior from 2D magnets. Our vdW magnets are created using state-of-the-art techniques to provide highest magnetic quality crystals through slow but high quality self-flux technique without using any contaminating transport agents.
CrCl3 (chromium triichloride) is layered antiferromagnet which is rather easy to exfoliate down to monolayer and shows excellent environmental stability. It exhibits a magnetic ordering temperature between 14 to 17 K. CrCl3 is at the cusp of ferromagnetic ordering upon small amount of applied magnetic field strength. Moreover, recent studies have shown that CrCl3 layered crystals undergo a crystallographic phase transition near 240 K from monoclinic (C2/m) to rhombohedral (R3) at low temperatures. Our CrCl3 crystals are grown using chemical vapor transport technique without using any transport chemical agent to ensure no contamination is present. Our precursors are purified with added care to eliminate any magnetic impurities or magnetic dopants to eliminate magnetic contamination effects. All these products are handled using non-magnetic tweezers and in non-magnetic environment with tools that are free of magnetic impurities to ensure intrinsic magnetic properties can be confidently measured and probed.
Large amount of material to work for many months to years
Environmentally stable and easy to exfoliate for ease in your experimental work
Perfect crystallization: In our growth process, we pay close attention to creating perfect crystals, each and every crystal is handled and characterized under vacuum or Argon environment.
Sample packaging: Samples are purged with Ar gas multiple times, pumped to 1E-6 Torr pressures to ensure crystals do not interact with the residual gases.
Fresh samples: Crystals are always freshly grown and immediately shipped out.
Full characterization: Samples are characterized using variety of techniques all under inert gas conditions to confirm the crystalline quality (see product images)
CrCl3 is a common starting material in the synthesis of organometallic and coordination compounds of Cr. Deposited as an irregular solid with no possibility of recrystallization, it is not a purity guaranteed chemical, causing problems in some cases. In this work, we disclose a well-defined form of the THF adduct of CrCl3 ([CrCl2(-Cl)(thf)2]2), a crystalline solid, that enables structure determination by X-ray crystallography. The EA data and XRD pattern of the bulk agreed with the revealed structure. Moreover, its preparation procedure is facile: evacuation of CrCl36H2O at 100 C, treatment with 6 equivalents of Me3SiCl in a minimal amount of THF, and crystallization from CH2Cl2. The ethylene tetramerization catalyst [iPrN{P(C6H4-p-Si(nBu)3)2}2CrCl2]+[B(C6F5)4] prepared using well-defined [CrCl2(-Cl)(thf)2]2 as a starting material exhibited a reliably high activity (6600 kg/g-Cr/h; 1-octene selectivity at 40 C, 75%), while that of the one prepared using the impure CrCl3(thf)3 was inconsistent and relatively low (~3000 kg/g-Cr/h). By using well-defined [CrCl2(-Cl)(thf)2]2 as a Cr source, single crystals of [(CH3CN)4CrCl2]+[B(C6F5)4] and [{Et(Cl)Al(N(iPr)2)2}Cr(-Cl)]2 were obtained, allowing structure determination by X-ray crystallography, which had been unsuccessful when the previously known CrCl3(thf)3 was used as the Cr source.
