Europium. An application of the complexes of the element (e.g., Eu(fod) 3) is as shift reagents in nuclear magnetic resonance. This has, however, been banished because of the advent of cheaper superconducting magnets spectroscopy. Chiral shift reagents, such as Eu(hfc) 3, are still used to determine enantiomeric purity [57–61]. Other ...

Europium provides a new idea for the development of new antineoplastic drugs. The combination of Eu with tumor-targeted groups or drugs can reduce the damage to the healthy tissue. 4.6 Biological safety of europium. Good biological safety is a …

2015年7月1日 · The trivalent europium ion (Eu3+) is well known for its strong luminescence in the red spectral region, but this ion is also interesting from a theore…

1984年1月1日 · The predicted stability of divalent europium in aqueous solution at elevated temperatures is consistent with the large positive europium anomalies in rare earth element patterns of high-temperature barites of hydrothermal and metamorphic origin reported by Guichard et al. [5] and with the observed depletion of europium as a result of high ...

2000年1月1日 · The element europium, atomic number 63 is one of most interesting among the lanthanides, especially in the +3 oxidation state. Its compounds present several important properties and applications. Due to narrow f–f transitions, a good sensitization of the Eu 3+ luminescence can be achieved through the antenna effect.

2015年7月1日 · In this review, europium(III) is represented as Eu 3+ rather than Eu(III). In principle Eu 3+ is the trivalent europium ion in the gas phase. However, it is common practice among spectroscopists to use the symbol Eu 3+ for europium(III)-doped solid materials and even for europium(III) in solutions. Fig. 1 shows a selection of ligands that are ...

2024年1月1日 · A Europium MOF-based turn-off fluorescent sensor for tryptophan detection in human serum, urine and lake water J. Solid State Chem. , 311 ( 2022 ) , Article 123138 , 10.1016/j.jssc.2022.123138 View PDF View article Google Scholar

2019年3月15日 · Graphite and Europium(III) nitrate hydrate Eu(NO 3) 3 ·5H 2 O chemicals were purchased from the Sigma Aldrich. 0.1 M phosphate buffer (pH 7.0) prepared from sodium dihydrogen phosphate and disodium hydrogen phosphate was used as supporting electrolyte. The chemicals chloramphenicol, nitrobenzene, nitrophenol, nitroanilline, aminophenol was all ...

2022年12月5日 · The fact that europium ion leads to enhanced MDT in DPC based MOFs is also correlated with increased value of long range (Ω 4) compared to short range Judd-Ofelt parameter (Ω 2). For Eu-BDC-NH 2 and Eu-BDC-PC MOF though Ω 2 value is much higher than Ω 4 , which is in line with asymmetry value trend discussed above.

2001年9月10日 · When the europium coated electrodeposits are withdrawn from the bath, the europium atoms come into contact with oxygen, they immediately react with oxygen and form the europium oxide. The proposed reaction mechanism can be given by following reactions: (12) 4 Eu +3 O 2 →2 Eu 2 O 3 (13) 3 Eu +2 O 2 → Eu 3 O 4 The film thickness is measured ...