Spectroscopic properties of neodymium monochloroacetate single crystal as an example of complex containing Nd(III) in three different symmetry sites

The neodymium monochloroacetate complex was obtained in the form of monocry stal. The absorption and emission spectra for this single crystal were reco rded at room and low temperatures down to 4.2 K. Intensities of electronic lines and Judd-Ofert parameters were calculated. Splitting and energies of electronic levels were considered and compared to those for the neodymium t richloroacetate single crystals. The covalent effect in the spectra was dis cussed. The results obtained from the low temperature spectra for [{Nd(ClH2 CCOO)(3)}(3)(H2O)(5)](n) indicated three different symmetry sites of Nd3+ i on. Correlation with the X-ray data was made. (C) 2000 Elsevier Science S.A . All rights reserved.