Visible‐Light Excitation of Infrared Lanthanide Luminescence via Intra‐Ligand Charge‐Transfer State in 1,3‐Diketonates Containing Push‐Pull Chromophores

Shavaleev, Nail M.; Scopelliti, Rosario; Gumy, Frédéric; Bünzli, Jean‐Claude G.

doi:10.1002/ejic.200701197

Cited by 43 publications

(16 citation statements)

References 43 publications

(46 reference statements)

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“…The resonance signals of the methylene protons of the major species isomers showed four peaks at 5.18 (dd, J = 23.8, 12.1 Hz, 2H, -CH 2 -), 4.78 (d, J = 11.9 Hz, 2H, -CH 2 -), 4.00 (t, J = 12.0 Hz, 2H, -CH 2 -), and 3.63 (d, J = 14.2 Hz, 2H, -CH 2 -). And the active methylene of -diketonates shows [20,[28][29][30]. It confirmed that oxygen atom of -diketonate did not bind to uranyl ion, also indicated by the FTIR spectra analysis.…”

Section: Proton Nmr Spectra Analysissupporting

confidence: 61%

Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the β-Diketonates Biscatecholamide Ligand

Zhang

Jin

Peng

et al. 2017

International Journal of Photoenergy

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A series of uranyl complexes have been synthesized by reacting hexadentate ligands CH 2 [COO (CH 2 ) n CAM; = 2, 3, 4] 2 [CAM = 2,3-Ph(OH) 2 CONH] containing the catecholamide (CAM) group and -diketonates framework with uranyl nitrate. They were characterized by FTIR, UV-vis, 1 H NMR, XPS, TGA, and elemental analysis. The analysis revealed that oxygen atom of -diketonate did not bind to uranyl ion in complexes 1-3. The photocatalytic degradation properties of the target complexes for degradation of rhodamine B (RhB) were investigated. The result indicated that approximately 74%, 71%, and 67% RhB were degraded in the presence of complexes 1-3 after about 210 min, respectively. Consequently, complexes 1-3 have excellent photocatalytic degradation property.

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Section: Proton Nmr Spectra Analysissupporting

confidence: 61%

Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the β-Diketonates Biscatecholamide Ligand

Zhang

Jin

Peng

et al. 2017

International Journal of Photoenergy

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“…The energy of the donor excited state can be estimated from the zero-phonon transition wavelength l 0-0 estimated to be 635 nm (15 750 cm À1 ) from the intersection of the absorption and emission spectra. This result is in the range of the longest wavelengths reported for the Yb sensitization using antenna featuring xanthene (fluroescein, eosin, erythrosine, or rhodamine 6G, 500-550 nm), [44] Bodipy (530 nm), [45] or push-pull (550 nm) [46] chromophores. In the particular case of Yb III , the sensitization process remains a matter of debate due to the presence of a single excited state responsible for the absorption and emission.…”

mentioning

confidence: 58%

Tetrathiafulvalene‐amido‐2‐pyridine‐N‐oxide as Efficient Charge‐Transfer Antenna Ligand for the Sensitization of Yb^III Luminescence in a Series of Lanthanide Paramagnetic Coordination Complexes

Pointillart

Cauchy

Maury

et al. 2010

Chemistry A European J

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The tetrathiafulvalene-amido-2-pyridine-N-oxide (L) ligand has been employed to coordinate 4f elements. The architecture of the complexes mainly depends on the ionic radii of the lanthanides. Thus, the reaction of L in the same experimental protocol leads to three different molecular structure series. Binuclear [Ln(2)(hfac)(5)(O(2)CPhCl)(L)(3)]·2 H(2)O (hfac(-)=1,1,1,5,5,5-hexafluoroacetylacetonate anion, O(2)CPhCl(-)=3-chlorobenzoate anion) and mononuclear [Ln(hfac)(3)(L)(2)] complexes were obtained by using rare-earth ions with either large (Ln(III)=Pr, Gd) or small (Ln(III)=Y, Yb) ionic radius, respectively, whereas the use of Tb(III) that possesses an intermediate ionic radius led to the formation of a binuclear complex of formula [Tb(2)(hfac)(4)(O(2)CPhCl)(2)(L)(2)]. Antiferromagnetic interactions have been observed in the three dinuclear compounds by using an extended empirical method. Photophysical properties of the coordination complexes have been studied by solid-state absorption spectroscopy, whereas time-dependent density functional theory (TD-DFT) calculations have been carried out on the diamagnetic Y(III) derivative to build a molecular orbital diagram and to reproduce the absorption spectrum. For the [Yb(hfac)(3)(L)(2)] complex, the excitation at 19,600 cm(-1) of the HOMO→LUMO+1/LUMO+2 charge-transfer transition induces both line-shape emissions in the near-IR spectral range assigned to the (2)F(5/2)→(2)F(7/2) (9860 cm(-1)) ytterbium-centered transition and a residual charge-transfer emission around 13,150 cm(-1). An efficient antenna effect that proceeds through energy transfer from the singlet excited state of the tetrathiafulvalene-amido-2-pyridine-N-oxide chromophore is evidence of the Yb(III) sensitization.

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“…The ligand of complex absorbs the light and migrates to its singlet state and then transfer to its triplet state by intersystem crossing. Then the triplet molecule passes the energy to the center ion [24]. The wide exciting bands of the Nd complex are attributed π-π* transitions of ligands TTA and Dpbt.…”

Section: Photoluminescence Properties Of Nd-doped Pmmamentioning

confidence: 98%

Effect on the fluorescence branching ratio of different synergistic ligands in neodymium complex doped PMMA

Wang

Sun

Wang

et al. 2012

Journal of Non-Crystalline Solids

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Visible‐Light Excitation of Infrared Lanthanide Luminescence via Intra‐Ligand Charge‐Transfer State in 1,3‐Diketonates Containing Push‐Pull Chromophores

Cited by 43 publications

References 43 publications

Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the β-Diketonates Biscatecholamide Ligand

Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the β-Diketonates Biscatecholamide Ligand

Tetrathiafulvalene‐amido‐2‐pyridine‐N‐oxide as Efficient Charge‐Transfer Antenna Ligand for the Sensitization of Yb^III Luminescence in a Series of Lanthanide Paramagnetic Coordination Complexes

Effect on the fluorescence branching ratio of different synergistic ligands in neodymium complex doped PMMA

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Visible‐Light Excitation of Infrared Lanthanide Luminescence via Intra‐Ligand Charge‐Transfer State in 1,3‐Diketonates Containing Push‐Pull Chromophores

Cited by 43 publications

References 43 publications

Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the β-Diketonates Biscatecholamide Ligand

Investigation on the Synthesis and Photocatalytic Property of Uranyl Complexes of the β-Diketonates Biscatecholamide Ligand

Tetrathiafulvalene‐amido‐2‐pyridine‐N‐oxide as Efficient Charge‐Transfer Antenna Ligand for the Sensitization of YbIII Luminescence in a Series of Lanthanide Paramagnetic Coordination Complexes

Effect on the fluorescence branching ratio of different synergistic ligands in neodymium complex doped PMMA

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Tetrathiafulvalene‐amido‐2‐pyridine‐N‐oxide as Efficient Charge‐Transfer Antenna Ligand for the Sensitization of Yb^III Luminescence in a Series of Lanthanide Paramagnetic Coordination Complexes