After the recent finding that CrI 3 , displays ferromagnetic order down to its monolayer, extensive studies have followed to pursue new two-dimensional (2D) magnetic materials. In this article, we report on the growth of single crystal CrCl 3 in the layered monoclinic phase. The system after mechanical exfoliation exhibits stability in ambient air (the degradation occurs on a time scale at least four orders of magnitude longer than is observed for CrI 3 ). By means of mechanical cleavage and atomic force microscopy (AFM) combined with optical identification, we demonstrate the systematic isolation of single and few layer flakes onto 270 nm and 285 nm SiO 2 /Si (100) substrates with lateral size larger than graphene flakes isolated with the same method. The layer number identification has been carried with statistically significant data, quantifying the optical contrast as a function of the number of layers for up to six layers. Layer dependent optical contrast data have been fitted within the Fresnel equation formalism determining the real and imaginary part of the wavelength dependent refractive index of the material. A layer dependent (532 nm) micro-Raman study has been carried out down to two layers with no detectable spectral shifts as a function of the layer number and with respect to the bulk.

Two-dimensional (2D) magnets like chromium trihalides CrX3 (X = I, Br, Cl) represent a frontier for spintronics applications and, in particular, CrCl3 has attracted research interest for its relative stability...

The Lewis Acidity of Organylbismuth(iii) Compounds. New Organylbismuth(iii) Dithiocarbamate Chemistry. The Crystal and Molecular Structure of Bis-(diethyldithiocarbamato)phenylbismuth(iii) and Bis(diethy1dithiocarbamato)-[2-(2'-pyridyl)phenyl] bismuth( 1 1 1 ) *

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A range of bismuth and organobismuth carboxylates has been prepared (e.g. Bi(carboxylate)3; PhBi(carboxylate'),; and Ph,Bi(carboxylate"), where carboxylate = octanoate, i.e. 5-ethylhexanoate; carboxylate' = acetate and monomaleate; carboxylate" = acetate, propionate, benzoate, 5-ethylhexanoate, and 0.5 oxalate. A combination of IR (solid) and NMR (solution) studies suggests that in the case of the bismuth(V) compounds the carboxylates may be inequivalent in the crystalline forms but equivalent in solution. The compounds have been tested as driers in two paint formulations, Synolac SOW (linseed-based) and Sorbal P470 (linoleic-rich). Although initially promising results were obtained for Synolac 50W, the shelf life of the bismuth driers was poor. With Sorbal P470, bismuth driers were inferior to established formulations. However, a combination of Bi(OOCH,H,,), with tris(diethyldithiocarbamat0)-bismuth(II1) out-performed established driers.

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We investigate the experimentally challenging CrCl3 surface by photon energy dependent photoemission. The core and valence electrons after cleavage of the single crystal, either in ultra high vacuum (UHV) or...

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