Synthesis and luminescence of Eu(III) complexes with macrocyclic azacrown ethers and 1,10-phenanthroline

Lee, Mi Kyung; Choi, Kwang-Soon; Cho, Hyung-Kook; Kang, Ji-Hoon

doi:10.1016/j.jlumin.2007.01.012

Cited by 6 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in XPS analysis, Eu 3+ ions are also present at the surface layer, we attempted to induce the red emission from Eu 3+ by modifying the ZnO:Eu 3+ nanowall surface with phen. For a Eu 3+ complex with phen, the sensitized emission from Eu 3+ can be effectively generated by phen. , First, the surfaces of the as-grown and the postannealed ZnO:Eu 3+ nanowalls were modified by dipping them in phen with three different concentrations (0.010, 0.050, and 0.10 M) in CH 2 Cl 2 for 30 s then PL with excitation wavelength of 325 nm were measured. Evidently, surface-functionalization with 0.010 M solution of phen has no effect on the PL spectrum for the as-grown ZnO:Eu 3+ nanowalls (Figure a).…”

Section: Resultsmentioning

confidence: 99%

Observation of Mediated Cascade Energy Transfer in Europium-Doped ZnO Nanowalls by 1,10-Phenanthroline

et al. 2015

Self Cite

View full text Add to dashboard Cite

Embedding rare earth ions into a host material such as alkali halides, semiconductors, and metal oxides has been extensively studied, with the goal to improve performance in light emitting devices and biomedicine. Here, Europium-embedded ZnO nanowall structures have been achieved by a facile electrochemical deposition method. Upon Eu embedment, the nanowalls were found to become thicker and stacked. X-ray photoemission study revealed that Zn(OH) 2 was more dominant than ZnO near the surface and it confirmed that Eu(III) was uniformly distributed in the ZnO−Zn(OH) 2 core−shell structure. We also measured the photoluminescence spectra of as-grown, heat-treated and 1,10-phenanthroline surface-functionalized ZnO nanowalls samples, which led us to propose a unique cascade energy transfer model between ZnO, 1,10-phenanthroline, and Eu 3+ ion.

show abstract

Section: Resultsmentioning

confidence: 99%

Observation of Mediated Cascade Energy Transfer in Europium-Doped ZnO Nanowalls by 1,10-Phenanthroline

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

Luminescence and Magnetic Properties of Tb(III) Complexes with TETA and Synergistic Effect by 1,10‐Phenanthroline

Kang

Leung

Cho

et al. 2016

Bulletin Korean Chem Soc

Self Cite

View full text Add to dashboard Cite

Two Tb(III) complexes, [Tb(TETA)] − and [Tb(TETA)(phen)] − (TETA = 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraacetate and phen = 1,10-phenanthroline), were synthesized and their luminescence ( 5 D 4 ! 7 F J=0-6 transitions) and magnetic properties were examined. The photoluminescence (PL) quantum yield of [Tb(TETA)(phen)] − (Q = 0.47) was significantly higher than that of [Tb(TETA)] − (Q = 0.006).The dramatic increase (78×) in green luminescence was attributed to intramolecular energy transfer from phen to Tb(III). The energy transfer rate according to Dexter theory was found to be approximately 10 11 s −1 . The temperature dependence of the molar susceptibilities confirmed that the two complexes behave as paramagnets obeying the Curie-Weiss law. In addition, the field-dependent magnetization of the two complexes measured in the −70 to + 70 kOe range at T = 1.8 K fitted well with the Brillouin function with the following values: g eff = 1.5, μ B = 9.27 × 10 −21 emu, and J = 6. These results provide new insights into the development of lanthanide metal complexes with tetraaza Results and DiscussionPL and Excitation Spectra. Figure 1(a) shows the PL spectra of the powdered Tb(III) complexes taken at 10 K. The PL spectra at RT (not shown) were similar but weaker Article

show abstract

Synthesis and spectroscopic–electrochemical properties of novel ratiometric Hg (II) chemosensor containing Bodipy and the N-phenylaza-15-crown-5 moiety

Kursunlu

Devecı

Güler

2013

Journal of Luminescence

View full text Add to dashboard Cite

The aryl-amine containing azacrown ether ring and alkyl-chloro boradiazaindacene (Bodipy) were synthesized by Schiff base condensation. The absorption and emission of a novel Schiff base derivative (based on azacrown-Bodipy ) were performed in presence of different cations such as Zn2+, Ga3+, Pb2+, Hg2+, NH4+ Ca2+, Cu2+, Na+, Ni2+, Cd2+ and Cr3+. The complexation property of the Schiff base was studied in dimethylformamide (DMF) by interacting azacrown-ether group and transition metal nitrates-ammonium chloride. The electrochemical behavior of the Schiff base has also been investigated by cyclic voltammetry. All experimental results indicated that the new compound act as a selective ratiometric chemosensor for Hg2+.

show abstract

Synthesis and luminescence of Eu(III) complexes with macrocyclic azacrown ethers and 1,10-phenanthroline

Cited by 6 publications

References 20 publications

Observation of Mediated Cascade Energy Transfer in Europium-Doped ZnO Nanowalls by 1,10-Phenanthroline

Observation of Mediated Cascade Energy Transfer in Europium-Doped ZnO Nanowalls by 1,10-Phenanthroline

Luminescence and Magnetic Properties of Tb(III) Complexes with TETA and Synergistic Effect by 1,10‐Phenanthroline

Synthesis and spectroscopic–electrochemical properties of novel ratiometric Hg (II) chemosensor containing Bodipy and the N-phenylaza-15-crown-5 moiety

Contact Info

Product

Resources

About