Co-existence of heterometallic Zn2Er and ZnEr arrayed chromophores for the sensitization of near-infrared (NIR) luminescence

Tao, Wei; Zhao, Shunsheng; Bi, Weiyu; Lü, Xingqiang; Hui, Yani; Song, Jirong; Wong, Wai‐Kwok; Jones, Richard A.

doi:10.1016/j.inoche.2009.09.024

Cited by 25 publications

(6 citation statements)

References 31 publications

(19 reference statements)

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“…Metals such as Ni 2+ , Cu 2+ , and Co 2+ usually quench organic ligand luminescence; this is in contrast to the Zn 2+ and Cd 2+ ions, for which the effect is not present . As depicted in Figure , upon excitation at approximately λ =370 nm, two strong emission bands are observed at λ =466 and 494 nm with a weak emission band at λ =570 nm in azpy.…”

Section: Resultsmentioning

confidence: 97%

“…Metals such as Ni 2 + ,C u 2 + ,a nd Co 2 + usuallyq uench organic ligand luminescence; [28][29][30][31][32][33][34][35][36] this is in contrast to the Zn 2 + and Cd 2 + ions, for which the effect is not present. [37][38] As depicted in Figure 7, upon excitation at approximately l = 370 nm, two strong emission bands are observed at l = 466 and 494 nm with aw eake mission band at l = 570 nm in azpy.I rradiation of crystalline complexes 1-5 under similar conditions (l ex = 378 nm) resulted in broad unsymmetrical emissions,a sapair of bands at l = 468, 468, 463, 469, and 464 nm and correspondingly other bands at l = 492, 493, 486, 491 and 483 nm, respectively.T he profiles of the emissionb ands are quite similar to that of the metal-free ligand.T he similare missionso f1-5 can be assigned to intraligand emission of azpy,a sp reviously reported. [42,43] An enhancement in the emissions, relative to that of the free ligand, was observed in complexes 2, 4,a nd 5.…”

Section: Luminescent Propertiesmentioning

confidence: 97%

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Structural Variety of Cobalt(II), Nickel(II), Zinc(II), and Cadmium(II) Complexes with 4,4′‐Azopyridine: Synthesis, Structure and Luminescence Properties

Pladzyk

Ponikiewski

Dołęga

et al. 2015

Chemistry An Asian Journal

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Self-assembled bi- and polymetallic complexes of Co(II), Ni(II), Zn(II), and Cd(II) were obtained by the reaction of 4,4'-azopyridine (azpy) with metal tri-tert-butoxysilanethiolates (Co, 1; Cd, 2), acetylacetonates (Ni, 3; Zn, 4), and acetates (Cd, 5). All compounds were characterized by single-crystal X-ray structure analysis, elemental analysis, FTIR spectroscopy, and thermogravimetry. Complexes 1, 2 and 4, 5 exhibit diverse structural conformations: 1 is bimetallic, 2 and 4 are 1D coordination polymers, and 5 is a 2D coordination framework formed from bimetallic units. The obtained complexes contain metal atoms bridged by a molecule of azpy. The luminescent properties of 1-5 were investigated in the solid state.

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Section: Resultsmentioning

confidence: 97%

Section: Luminescent Propertiesmentioning

confidence: 97%

Structural Variety of Cobalt(II), Nickel(II), Zinc(II), and Cadmium(II) Complexes with 4,4′‐Azopyridine: Synthesis, Structure and Luminescence Properties

Pladzyk

Ponikiewski

Dołęga

et al. 2015

Chemistry An Asian Journal

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“…Dinuclear Zn(II)-Ln(III) complexes with Schiff base ligands show effective photosensitized luminescence (Fig. 8c) [71][72][73][74] . Luminescent polynuclear Zn(II)-Ln(III) complexes with Zn(II) quinolinate, terpyridine, phenanthroline, and a Schiff base have also been reported (Fig.…”

Section: Light and Transition Metal Complexesmentioning

confidence: 99%

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

2018

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The 4f-4f emission of Tb(III), Eu(III), and Sm(III) complexes plays an important role in the design of monochromatic green, red, and deep-red luminescent materials for displays, lighting, and sensing devices. The 4f-4f emission of Yb(III), Nd(III), and Er(III) complexes is observed in the near-infrared (IR) region for bioimaging and security applications. However, their absorption coefficients are extremely small (ε < 10 L mol −1 cm −1 ). In this review, photosensitized luminescent lanthanide(III) complexes containing organic chromophores (ligands) with large absorption coefficients (ε > 10,000 L mol −1 cm −1 ) are introduced. Organic molecular design elements, including (1) the control of the excited triplet (T 1 ) state, (2) the effects on the charge-transfer (CT) band, and (3) the energy transfer from metal ions for effective photosensitized luminescence, are explained. The characteristic electrosensitized luminescence (electroluminescence) and mechanoluminescence (triboluminescence) of lanthanide(III) complexes are also explained. Lanthanide(III) complexes with well-designed organic molecules are expected to open avenues of research among the fields of chemistry, physics, electronics, and material science.

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“…The time-resolved fluorescence decay-fitting parameters and photoluminescence quantum yields for a series of polymers are reported in Table S6 in the Supporting Information. It is interesting to compare the lifetimes and quantum yields with those of analogous complexes previously reported, and relevant values are listed in Table . − From Table , we can find the solid-state lifetime of the Nd III compound is comparable with that reported for neodymium selenolate, which is 13 μs, and the fluorescence decay times of the quantum yield are considered to be higher among Nd III complexes . They are somewhat higher than those of homolanthanide chelate complexes: the 8-hydroxyquinolinate ligand .…”

Section: Resultsmentioning

confidence: 73%

Series d–f Heteronuclear Metal–Organic Frameworks: Color Tunability and Luminescent Probe with Switchable Properties

et al. 2017

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A series of five unique d-f heteronuclear luminescent metal-organic frameworks (MOFs) in an entangled polyrotaxane array and the light-harvesting block homonuclear zinc compound have been isolated successfully and characterized. The series of isostructural polymers feature 3,4-connected (4.8)(4.8.9)(6.8.9)(6.9)(8) topology and high stability, exhibiting diverse void spaces. By taking advantage of the isostructural MOFs 2 and 3, the intensities of red and green emissions can be modulated by adjusting the ratios of Eu and Tb ions correspondingly, and white-light emission can be generated by a combination of different doped Tb and Eu concentrations. The Tb-Zn-based framework {[TbZn(bipy)(Hmimda) (HO)]·5HO} (3; Hmimda = 2-methyl-1-H-imidazole-4,5-dicarboxylic acid and bipy = 4,4'-bipyridine) can detect trace Mg ion with relatively high sensitivity and selectivity. Dehydrated MOF 3a shows a remarkable emission quenching effect through the introduction of I solids. Further investigation indicates that it exhibits turn on/off switchable properties for small solvent molecules or heavy-metal ions. Steady/transient-state near-IR luminescence properties for MOFs 1, 4, and 5 were investigated under visible-light excitation.

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Co-existence of heterometallic Zn2Er and ZnEr arrayed chromophores for the sensitization of near-infrared (NIR) luminescence

Cited by 25 publications

References 31 publications

Structural Variety of Cobalt(II), Nickel(II), Zinc(II), and Cadmium(II) Complexes with 4,4′‐Azopyridine: Synthesis, Structure and Luminescence Properties

Structural Variety of Cobalt(II), Nickel(II), Zinc(II), and Cadmium(II) Complexes with 4,4′‐Azopyridine: Synthesis, Structure and Luminescence Properties

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

Series d–f Heteronuclear Metal–Organic Frameworks: Color Tunability and Luminescent Probe with Switchable Properties

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