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2005
Luminescence
D 6540
Luminescence from Tungstate Functionalized Sodalites Involving NIR States. —
Tungstate supported Ln3+ (Ln: Nd, Ho, Er, Yb) exchanged zeolites X are synthesized
03- 013 from
zeolite X by ion exchange with stoichiometric amounts of 0.5 M Ln3+ aqueous
solution at 100 °C followed by heating a mixture of doped zeolite and WO3 at
600—1000 °C in air. While the parent zeolites do not yield noticeable luminescence of
Ln3+, the tungstate functionalized samples exhibit near infrared emission and even upconversion processes. — (LEZHNINA, M.; KYNAST*, U.; J. Alloys Compd. 380
(2004) 1-2, 55-60; Fachbereich Chemieingenieurwesen, Fachhochsch. Muenster,
D-48565 Steinfurt, Germany; Eng.) — W. Pewestorf
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