Color and Brightness Tuning in Heteronuclear Lanthanide Terephthalate Coordination Polymers

Haquin, Victor; Etienne, Mael; Daiguebonne, Carole; Freslon, Stéphane; Calvez, Guillaume; Bernot, Kévin; Pollès, Laurent Le; Ashbrook, Sharon E.; Mitchell, Martin R.; Bünzli, Jean‐Claude G.; Eliseeva, Svetlana V.; Guillou, Olivier

doi:10.1002/ejic.201300381

Cited by 84 publications

(194 citation statements)

References 50 publications

(76 reference statements)

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“…It is also well-known that intermetallic energy transfer is efficient when lanthanide ions are less than ∼10 Å far from each other. 63 Figure 8. This wavelength is suitable Figure 5.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates

Natur¹,

Calvez

Guégan

et al. 2015

Inorg. Chem.

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For the first time, hexanuclear complexes with general chemical formula [Ln6O(OH)8(NO3)6(H2O)n](2+) with n = 12 for Ln = Sm-Lu and Y and n = 14 for Ln = Pr and Nd were stabilized as nanoaggregates in ethylene glycol (EG). These unprecedented nanoaggregates were structurally characterized by (89)Y and (1)H NMR spectroscopy, UV-vis absorption and luminescence spectroscopies, electrospray ionization mass spectrometry, diffusion ordered spectroscopy, transmission electron microscopy, and dynamic light scattering. These nanoaggregates present a 200 nm mean solvodynamic diameter. In these nanoaggregates, hexanuclear complexes are isolated and solvated by EG molecules. The replacement of ethylene glycol by 2-hydroxybenzyl alcohol provides new nanoaggregates that present an antenna effect toward lanthanide ions. This results in a significant enhancement of the luminescence properties of the aggregates and demonstrates the suitability of the strategy for obtaining highly tunable luminescent solutions.

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“…It is also well-known that intermetallic energy transfer is efficient when lanthanide ions are less than ∼10 Å far from each other. 63 Figure 8. This wavelength is suitable Figure 5.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates

Natur¹,

Calvez

Guégan

et al. 2015

Inorg. Chem.

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“…96 This discrepancy between quantum yield and luminance can be related to the absorption ability of the ligand. Actually, the luminescence intensity depends on both the quantum yield and the molar absorption coefficient:…”

Section: Inorganic Chemistrymentioning

confidence: 99%

A Family of Lanthanide-Based Coordination Polymers with Boronic Acid as Ligand

et al. 2015

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Reactions in water between the sodium salt of 4-carboxyphenylboronic acid (Hcpb) and lanthanide ions (Pr-Nd, Sm-Lu, and Y) led to a family of lanthanide-based coordination polymers with general chemical formula {[Ln(cpbOH)(H2O)2](cpb)}∞. Structural characterizations were ensured by single-crystal X-ray diffraction and solid-state NMR spectroscopy ((11)B, (13)C, and (89)Y). This family of compounds constitutes the first example of lanthanide-based coordination polymers involving 4-carboxyphenylboronic acid as ligand. To evaluate their potential usefulness, luminescent and magnetic properties of some of the compounds that constitute this family were explored. From a magnetic point of view, the Yb(III) compound is the more promising. On the other hand, upon UV irradiation (λexc = 303 nm) ligand phosphorescence is quite intense and offers a sizable blue component to emission spectra. This is quite unusual and can constitute an asset as far as white emission is targeted. Moreover, luminescence properties of these compounds are highly temperature-dependent, and some of them seem promising as molecular thermometers.

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“…As the energy transfer to the metal ions is not complete, the MOF linker is responsible for a broadband emission with its maximum in the blue region of the visible spectrum; Eu 3+ and Tb 3+ add 4f-based red and green components so that a single-source three-color emitter is created. Even four different lanthanide ions were mixed to achieve and tune the emission of white light in the terephthalate framework [La 1.600 Dy 0.352 Tb 0.040 Eu 0.008 (BDC) 3 (H 2 O) 4 ] ∞ [43]. In these two MOFs lanthanum functions as separator for the luminescence centers.…”

Section: Luminescence Of Group 3 and Ln-mofsmentioning

confidence: 99%