In situ generation of fluorescent macrocyclic europium(II) complexes via zinc reduction

Shinoda, Satoshi; Nishioka, M.; Tsukube, Hiroshi

doi:10.1016/j.jallcom.2008.10.034

Cited by 9 publications

(15 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be observed in Table 4 and Figs. 5 and 6 that the excitation spectra of (EuL [1][2][3][4][5] 1, 3) were similar, as measured under 614 nm emission wavelength, and their maximum excitation peaks showed at 395 or 356 nm. Emission spectra of (EuL [1][2][3][4][5] 1, 3) were also similar and showed characteristic red luminescence of europium ion; the strongest emission peak appeared at 615 nm.…”

Section: Luminescence Studiessupporting

confidence: 51%

“…IR spectra of the free ligands showed bands at 1740-1748 cm À1 and 1630-1653 cm À1 , which were assigned to the stretch vibration of the carbonyl group (υ(C = O)), and υ(C-O-C) appeared at 1198-1206 cm À1 . In the IR spectra of the complexes (EuL [1][2][3][4][5] 1, 3), the absorption band for n(C = O) in the high frequency region remained unchanged but shifted about 8 cm À1 in the low frequency region. As a result, these data indicated that only the oxygen atom of amide carbonyl group was coordinated to the europium ion.…”

Section: Ir Spectral Analysismentioning

confidence: 97%

“…Analytical data for the complexes are listed in Table 1. Results of elemental analysis indicated that the composition of the six novel europium complexes conformed to (EuL [1][2][3][4][5][6] (13).…”

Section: Properties Of the Complexesmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and luminescence properties of 2‐(benzylcarbamoyl)phenyl derivatives and their europium complexes

Guo

Liu

et al. 2012

Luminescence

View full text Add to dashboard Cite

Six novel 2-(benzylcarbamoyl)phenyl derivatives were synthesized and characterized by (1) H-NMR, mass spectrometry, infrared spectra and elemental analysis. Their europium complexes were prepared and characterized by elemental analysis, EDTA titrimetric analysis, IR and UV spectra as well as molar conductivity measurements. The luminescence properties of these complexes were investigated and results show that 2-(benzylcarbamoyl)phenyl derivatives possess high selectivity and good coordination with the europium ion. Complex Eu-2-(benzylcarbamoyl)phenyl-2-phenylacetate showed green luminescence that was emitted by the ligand of 2-(benzylcarbamoyl)phenyl-2-phenylacetate, while other complexes showed the characteristic red luminescence of europium ion and also possessed high luminescence intensity.

show abstract

Section: Luminescence Studiessupporting

confidence: 51%

Section: Ir Spectral Analysismentioning

confidence: 97%

See 1 more Smart Citation

Synthesis and luminescence properties of 2‐(benzylcarbamoyl)phenyl derivatives and their europium complexes

Guo

Liu

et al. 2012

Luminescence

View full text Add to dashboard Cite

show abstract

“…[54] The reduction of Eu 3+ by Zn in the presence of 18-crown-6 or [2.2.2]cryptand was monitored by using the absorption bands at 250 and 330 nm, which were assigned to the Eu 2+ species. [54] Additionally, Eu 3+ oxides serve as starting materials for preparing Eu 2+ -containing complexes by electrochemical reduction. For example, Eu 2 O 3 was reduced electrochemically in the syntheses of the Eu 2+ complex of benzo-18-crown-6 and of triethanolamine.…”

Section: Synthesis Of Recent Eu2+-containing Complexesmentioning

confidence: 99%

“…[86] However, a blue luminescence was observed when benzo-15-crown-5 84 and benzo-18-crown-6 85 were used as ligands. [54,87] The Eu 2+ -containing complex with benzo-15-crown-5 is characterized by a Eu 2+ metal center that is sandwiched by two benzo-15-crown-5 ligands. [86] In the solid state, Eu 2+ – 85 shows an emission peak that is similar to that observed in methanol at room temperature.…”

Section: Applications Of Eu2+-containing Complexesmentioning

confidence: 99%

Developments in the Coordination Chemistry of Europium(II)

Garcia

Allen

2012

Eur J Inorg Chem

View full text Add to dashboard Cite

Recent advances in the coordination chemistry of Eu2+ are reviewed. Common synthetic routes for generating discrete Eu2+-containing complexes reported since 2000 are summarized, followed by a description of the reactivity of these complexes and their applications in reduction chemistry, polymerization, luminescence, and as contrast agents for magnetic resonance imaging. Rapid development of the coordination chemistry of Eu2+ has led to an upsurge in the utilization of Eu2+-containing complexes in synthetic chemistry, materials science, and medicine.

show abstract

Lanthanoid Complexes as Molecular Materials: The Redox Approach

Hay

Boskovic

2021

Chemistry A European J

View full text Add to dashboard Cite

The development of molecular materials with novel functionality offers promise for technological innovation. Switchable molecules that incorporate redox‐active components are enticing candidate compounds due to their potential for electronic manipulation. Lanthanoid metals are most prevalent in their trivalent state and usually redox‐activity in lanthanoid complexes is restricted to the ligand. The unique electronic and physical properties of lanthanoid ions have been exploited for various applications, including in magnetic and luminescent materials as well as in catalysis. Lanthanoid complexes are also promising for applications reliant on switchability, where the physical properties can be modulated by varying the oxidation state of a coordinated ligand. Lanthanoid‐based redox activity is also possible, encompassing both divalent and tetravalent metal oxidation states. Thus, utilization of redox‐active lanthanoid metals offers an attractive opportunity to further expand the capabilities of molecular materials. This review surveys both ligand and lanthanoid centered redox‐activity in pre‐existing molecular systems, including tuning of lanthanoid magnetic and photophysical properties by modulating the redox states of coordinated ligands. Ultimately the combination of redox‐activity at both ligands and metal centers in the same molecule can afford novel electronic structures and physical properties, including multiconfigurational electronic states and valence tautomerism. Further targeted exploration of these features is clearly warranted, both to enhance understanding of the underlying fundamental chemistry, and for the generation of a potentially important new class of molecular material.

show abstract

In situ generation of fluorescent macrocyclic europium(II) complexes via zinc reduction

Cited by 9 publications

References 7 publications

Synthesis and luminescence properties of 2‐(benzylcarbamoyl)phenyl derivatives and their europium complexes

Synthesis and luminescence properties of 2‐(benzylcarbamoyl)phenyl derivatives and their europium complexes

Developments in the Coordination Chemistry of Europium(II)

Lanthanoid Complexes as Molecular Materials: The Redox Approach

Contact Info

Product

Resources

About