EPR and optical studies of Nickel(II) at 300 K

Single crystal EPR studies of Ni(II) in hexaimidazolecobalt(II) dichloride tetrahydrate have been carried out at ambient temperature to obtain g and zero-field tensors, making it one of the very few systems having room temperature EPR data. The results show rhombic distortion around the Ni(II) ion, with the ion being entered the lattice substitutionally in place of Co(II). The optical data suggest trigonally distorted electronic structure around Ni(II) and collaboration with EPR data provided a few bonding parameters.

Graphical abstractTrial and error method has been used to extract the EPR parameters for Nickel(II) in hexaimidazolecobalt(II) dichloride tetrahydrate from the single crystal EPR data obtained at 300 K.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Non Kramer ion have been studied by EPR at 300 K, it is one of the rare observations. ► Single crystal EPR suggests a large D with a rhombic distortion. ► Nickel found to substitute the host ion in the lattice. ► Powder EPR data is comparable with single crystal EPR data. ► Optical study suggests tetragonal distortion supporting EPR data. ► Bonding parameters have been evaluated.