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Unusual luminescence of Ca 8 [Al 12 O 24 ](WO 4 ) 2 : Tb 3+
Author(s) -
Liu ShengLi,
Su Qiang
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040220509
Subject(s) - chemistry , luminescence , sodalite , stokes shift , excitation , doping , analytical chemistry (journal) , absorption (acoustics) , crystallography , crystal (programming language) , aluminate , zeolite , optics , metallurgy , condensed matter physics , physics , biochemistry , chromatography , computer science , programming language , catalysis , quantum mechanics , materials science , cement
The luminescence properties of aluminate sodalite Ca 8 [Al 12 O 24 ](WO 4 ) 2 (CAW) un doped and doped with Tb 3+ are reported and discussed. At morn temperature the emission of tetrahedral WO 4 2‐ in CAW showed an abnormally small Stokes shift (9060 cm −1 ), which is related to the crystal structure of CAW. A strong absorption band in the excitation spectrum of the Tb 3+ ‐activated CAW is ascribed to the absorption of the charge transfer state Tb 4+ ‐W 5+ , into which the excitation resulted in the efficient emission from the 5 D 4 level of Tb 3+ , but not from the 5 D 3 level.
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