期刊
DALTON TRANSACTIONS
卷 43, 期 30, 页码 11516-11528出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4dt00843j
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资金
- Federal Ministry of Economics and Energy (BMWi) [02E11021, 02E11011]
- Deutsches Elektronen Synchrotron (DESY) Hamburg, Germany [I-20130337]
In the presence of polyborates (detected by B-11-NMR) the formation of a weak Eu(III) borate complex (lg beta(11) similar to 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.
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