title: [Selective excitation spectroscopy of Eu[Cr0.1Al0.9 (OH)6 Mo6O18].11H2O].
abstract: Following the previous work, luminescent properties of Eu3+ ions in powder sample Eu[Cr0.1, Al0.9 (OH)6 Mo6 O18 ].11H2O was studied in detail. Experimental results revealed that there were three Eu3+ centers in the system. The dominant one can transfer its excitation energy to Cr3+ ions, as studied before. By conducting site-selective excitation at low temperature, emission spectra from the three centers were separated clearly. The fluorescence decay curves for different centers were also measured. Lifetime values 107 and 599 micros for 5 D0 energy level of center 1 (main site) and center 3 were obtained respectively, showing that the main site is in a lower symmetry.
authors: Structure Research Lab, Phys. Department, University of Science and Technology of China, Hefei 230026, China.
authors: Min
authors: M
authors: Yin
authors: J C
authors: JC
authors: Krupa
authors: A B
authors: AB
authors: Yusov
authors: A M
authors: AM
authors: Fedosseev
mesh_terms: D000536:Aluminum Hydroxide / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D003460:Crystallization; D004735:Energy Transfer; D005063:Europium / Q000737:chemistry*; D005453:Fluorescence; D008982:Molybdenum / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D011208:Powders; D013050:Spectrometry, Fluorescence
chemical_list: D010087:Oxides; D011208:Powders; D002857:Chromium; C082290:molybdenum trioxide; D005063:Europium; D000536:Aluminum Hydroxide; D008982:Molybdenum