Optical Absorption Spectra of Divalent Neodymium (Nd2+) in Bromide and Iodide Hosts. Issue 15 (20th April 2018)

• Record Type: Journal Article
• Authors: Karbowiak, Mirosław; Rudowicz, Czesław
• Is Part Of: European journal of inorganic chemistry. Issue 15(2018)
• Page Start: 1660
• Page End: 1669
• Publication Date: 2018-04-20
• Subjects: Neodymium -- Structure elucidation -- Ligand effects -- Lanthanides -- Divalent neodymium; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201701315
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : The electronic spectra for Nd 2+ ions in bromide and iodide hosts are reported for the first time. These spectra, together with the recently obtained spectra for the chloride matrix, constitute a substantial series of Nd 2+ spectra in crystals. Importantly, these crystals differ in the factors important for the physical properties of the divalent lanthanide Ln 2+ ions; that is, the ligand's chemical character and the symmetry of the crystal field. The available experimental data allow systematic investigations of the impact of these factors on the electronic spectra, and thus, spectroscopic properties of Nd 2+ ions. These investigations are the main aim of this study. The results indicate that due to the increasing covalence of the Nd 2+ environment in the Cl–Br–I series, the energy of the first f–d transition shifts into the infrared region, from 6121 cm –1 for SrCl2 /Nd 2+ to ca. 5260 cm –1 for SrI2 /Nd 2+, whereas the strength of the crystal field decreases along this series. Calculations using the parametric Hamiltonian and superposition model are carried out to quantitatively interpret the measured spectra. The simulated spectra exhibit good agreement with the experimental spectra. Using the proposed approach, a meaningful interpretation and assignment of the bands observed in the spectra has been achieved. Abstract : The electronic spectra for Nd 2+ ions in chloride, bromide, and iodide hosts are reported. Nd 2+ spectra in different crystals allow a systematic investigation of the impact of the ligand's chemical character and the symmetry of the crystal field on the spectra of Nd 2+ ions. Calculations using the parametric Hamiltonian and the superposition model allow the quantitative interpretation of the measured spectra.