Formation of a Eu(iii) borate solid species from a weak Eu(iii) borate complex in aqueous solutionElectronic supplementary information (ESI) available. See DOI: 10.1039/c4dt00843j

In the presence of polyborates (detected by 11 B-NMR) the formation of a weak Eu( iii ) borate complex (lg β 11 ∼ 2, estimated) was observed by time-resolved laser-induced fluorescence spectroscopy (TRLFS). This complex is a precursor for the formation of a solid Eu( iii ) borate species. The format...

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Main Authors: Schott, Juliane, Kretzschmar, Jerome, Acker, Margret, Eidner, Sascha, Kumke, Michael U, Drobot, Björn, Barkleit, Astrid, Taut, Steffen, Brendler, Vinzenz, Stumpf, Thorsten
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Language:English
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Summary:In the presence of polyborates (detected by 11 B-NMR) the formation of a weak Eu( iii ) borate complex (lg β 11 ∼ 2, estimated) was observed by time-resolved laser-induced fluorescence spectroscopy (TRLFS). This complex is a precursor for the formation of a solid Eu( iii ) borate species. The formation of this solid in solution was investigated by TRLFS as a function of the total boron concentration: the lower the total boron concentration, the slower is the solid formation. The solid Eu( iii ) borate was characterized by IR spectroscopy, powder XRD and solid-state TRLFS. The determination of the europium to boron ratio portends the existence of pentaborate units in the amorphous solid. Using time-resolved laser-induced fluorescence spectroscopy (TRLFS) the transformation of a dissolved Eu( iii ) borate species into a solid Eu( iii ) borate was observed.
ISSN:1477-9226
1477-9234
DOI:10.1039/c4dt00843j