title: Understanding Eu(3+) emission by using (15)N vibronic shifts.
abstract: Hexanitritolanthanates provide a unique opportunity to investigate the energy-level structures and crystal field of the lanthanide ion (Ln(3+)) in T(h) site symmetry, with 12-coordination to oxygen. However, the electronic spectra are mainly vibronic and particularly extensive and complex. Advantage may be taken of the high energy of NO(2)(-) vibrations, using (15)N substitution, in assigning the electronic emission spectra. These features form a fingerprint in less-congested spectral regions. The technique is demonstrated for the case of Ln = Eu, from the study of the (5)D(0) emission spectra.
authors.affiliation: Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, People's Republic of China.
authors.forename: Wenyu
authors.initials: W
authors.lastname: Li
authors.forename: Peter A
authors.initials: PA
authors.lastname: Tanner
mesh_terms: D005063:Europium / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry; D009587:Nitrogen Isotopes; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D028581:Lanthanoid Series Elements; D009587:Nitrogen Isotopes; D005063:Europium