Crystal structure and properties of neodymium complex with hexaazacyclooctadecane ligand

The neodymium complex with hexaazacyclooctadecane ([18]aneN(6)) has been obtained as a single crystal by the reaction of neodymium nitrate and macrocycle ligand in methanol solution. The crystal structure of the complex [Nd([18]aneN(6)) (NO3)(3)] was determined by X-ray diffraction. The neodymium centre is 10-coordinate with the coordination polyhedron being an irregular capped square-antiprism. The absorption spectrum of the complex was measured and the intensities of f-f transitions were analyzed according to the Judd-Ofelt theory. (C) 1997 Elsevier Science Ltd.