Mechanochemical synthesis of some europium diketonates

• Authors: Joana Zaharieva , Maria Milanova , Dimitar Todorovsky
• Languages of publication: EN

Abstracts

EN

Results on the influence of mechanoactivation (3–30 min) in a planetary ball mill on the composition, crystal structure, IR spectra and morphology of EuCl3·6H2O, dibenzoylmethane (HDBM) and mixtures of EuCl3·6H2O - HDBM and EuCl3·6H2O - HDBM - 1,10-phenathroline (phen) are presented. Mechanoactivation leads to a decrease of interplanar distances of the EuCl3·6H2O and HDBM and partial synthesis of Eu(DBM)3 and Eu(DBM)3·phen in the respective mixtures. The fluorescence properties of the products of activation (excitation and emission spectra, lifetime of the excited states) are similar to those of the complexes produced by the conventional “wet” methods, but the strongest excitation of the mechanochemically produced solid state samples is achieved at higher wavelength. Crystals of different forms (prismatic, needle-, long-length-leaf- and rod-like) are formed by mechanoactivation of the mentioned mixtures.

Keywords

EN

Mechanochemistry; Europium complexes; XRD; SEM; Photoluminescence

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2011
• Volume: 9
• Issue: 2
• Pages: 290-299

Dates

published

1 - 4 - 2011

online

17 - 2 - 2011

Contributors

author

Joana Zaharieva

• University of Sofia

author

Maria Milanova

• University of Sofia

author

Dimitar Todorovsky

• University of Sofia

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Identifiers

DOI

10.2478/s11532-011-0014-x