Wydział Chemii

Janina Legendziewicz

Małgorzata Guzik

Jacek Gliński

Kazimierz Jerie

Andrzej Baranowski

Andrzej Kochel

2008

Journal of Alloys and Compounds

451

172-178

10.1016/j.jallcom.2007.04.129

Naukowa

Angielski

Artykuł

The results of optical spectroscopy (absorption and emission) and positron annihilation investigations of glasses are presented and discussed. The alcoholic sol–gel method was adapted for the incorporation of Ln(III) into silica gel network and the resulting gels were prepared with chlorides of selected lanthanides (cerium, praseodymium, europium, ytterbium) and with or without some addition of ethylene glycol. During the sol–gel process, a new type of compound with general formula of C₁₂H₂₄Cl₃O₁₂Pr₂, 3(Cl) was crystallized. Its crystal structure was determined by X-ray diffraction studies what helps understanding the silica network structure. Measurements of absorption, emission and emission excitation spectra were carried out at 4 and 293 K. The optical properties of gels were compared with the spectroscopic data of C₁₂H₂₄Cl₃O₁₂Pr₂, 3(Cl) single crystal. The experimental results of positron annihilation investigations were correlated with those from optical spectroscopy.

Lanthanides chlorides, Ethylene glycol, Sol–gel, Absorption, Emission, Positron annihilation

https://doi.org/10.1016/j.jallcom.2007.04.129

http://www.elsevier.com