Wydział Chemii

Jerzy Sokolnicki

B. Urbański

Janina Legendziewicz

2000

Journal of Alloys and Compounds

300-301

450-455

10.1016/S0925-8388(99)00761-6

Naukowa

Angielski

Artykuł

Complexes of the type [Ln₂(Ala, Ile)₄(H₂O)₈](Cl)₆ (Ala: alanine, Ile: isoleucine, Ln=Er³⁺, Er³⁺:Tm³⁺, Er³⁺:Yb³⁺) were incorporated into silica sol–gels. The samples were transferred into glasses by heating in an N₂/CCl₄ and air atmospheres. Emission and absorption spectra for gels and glasses were measured and compared to those of the lanthanide precursor salt single crystals. Positions of broadened f–f bands of lanthanide ions make the resonance energy transfer between Er³⁺, Yb³⁺ and Tm³⁺ much more probable. Intensity analysis was performed, values of oscillator strengths were determined and τ_λ parameters were calculated from the Judd–Ofelt relation. Intensity of erbium hypersensitive transition were used as a test of metal clustering.

Er3+, Er3+:Tm3+, Er3+:Yb3+, Sol–gel, Spectroscopy

https://doi.org/10.1016/S0925-8388(99)00761-6

http://www.elsevier.com