Self-assembly of lanthanide(<scp>iii</scp>) coordination polymers from a bifunctional 2-(pyridin-2-yl)-1H-imidazole-4,5-dicarboxylate ligand with the assistance of oxalate: syntheses, structures, luminescence, and magnetic properties

Zhang, Liyang; Lü, Liping; Zhu, Mei; Feng, Sisi

doi:10.1039/c7ce00149e

Cited by 28 publications

(6 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results gathered in Table show that [Tb 0.2 La 1.8 (dcpa) 3 (H 2 O)] ∞ ( F1 ) and [Eu 0.2 La 1.8 (dcpa) 3 (H 2 O)] ∞ ( F1 ) exhibit remarkable overall quantum yields. In particular, the one measured on the Tb-derivative compares well with the highest overall quantum yields reported to date for coordination polymers. − …”

Section: Results and Discussionsupporting

confidence: 71%

High Luminance of Heterolanthanide-Based Molecular Alloys by Phase-Induction Strategy

et al. 2020

View full text Add to dashboard Cite

X-ray powder diffraction.Iso-structurality of the prepared molecular alloys, with [Eu 2 (dcpa) 3 (H 2 O)] ∞ 1 (F1) or with [Er 2 (dcpa) 3 (H 2 O) 5 •3H 2 O] ∞ (F2), 2 respectively, was assumed on the basis of their X-ray powder diffraction diagrams (Figures S1 to S5). Diagrams were collected using a Panalytical X'Pert Pro diffractometer equipped with an X'Celerator detector. Recording conditions were: 45 kV, 40 mA for Cu K ( = 1.542 Å) in / mode between 5° and 75°. Calculated patterns were produced using PowderCell and WinPLOTR programs. [3][4][5] Electron Dispersive Spectroscopy.Relative metallic contents of the different microcrystalline powders have been estimated on the basis of ESD measurements. Results of these measurements are listed in Tables S1 to S5. EDS measurements have been performed with a Hitachi TM-1000, Tabletop Microscope version 02.11 (Hitachi High-Technologies, Corporation Tokyo Japan) with EDS analysis system (SwiftED-TM, Oxford Instruments Link INCA). Samples were deposited on carbon discs. Reproducibility of the elemental analyses has been checked by repeating the measurements several times. These experiments confirm the homogeneity of the samples. Optical measurementsSolid-state emission and excitation spectra have been measured on a Horiba Jobin-Yvon Fluorolog III fluorescence spectrometer equipped with a Xe lamp 450 W, a UV-Vis photomultiplier (Hamamatsu R928, sensitivity 190-860 nm) and an IR-photodiode cooled by liquid nitrogen (InGaAs, sensitivity 800-1600 nm) or on a Horiba Jobin-Yvon FluoroMax 4 Plus fluorescence spectrometer equipped with a Xe lamp 150 W and a UV-Vis photomultiplier (Hamamatsu R928, sensitivity 190-860 nm). Quantum yield measurements were performed using a F-3018 Jobin-Yvon integrating sphere (  E c -E a )/(L a -L c ) with E c

show abstract

Section: Results and Discussionsupporting

confidence: 71%

High Luminance of Heterolanthanide-Based Molecular Alloys by Phase-Induction Strategy

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Around Nd2 are five carboxylate oxygen atoms and one nitrogen atom of four different L2 3– ligands and three oxygen atoms from three different water molecules. The Nd–O carboxylate bond distances are within 2.355(3) and 2.679(13) Å, Nd–O water bond distances are between 2.469(5) and 2.586(6) Å and Nd–N bond distances are 2.629(4) and 2.714(4) Å, all of which are comparable to the reported neodymium complexes. − In 1 , L2 3– ligands are completely deprotonated and have two distinct coordination modes, containing μ 4 -η 1 :η 1 :η 1 :η 1 :η 0 :η 1 :η 1 mode (mode I, Figure b) and μ 5 -η 1 :η 1 :η 1 :η 1 :η 1 :η 1 :η 1 mode (mode II, Figure c). The dihedral angles between the pyridine ring and benzene ring are 21.723 and 36.664° in mode I and II, respectively.…”

Section: Resultsmentioning

confidence: 99%

Two Novel Lanthanide Metal–Organic Frameworks: Selective Luminescent Sensing for Nitrobenzene, Cu²⁺, and MnO₄^–

Sun

Liu

et al. 2020

Crystal Growth & Design

View full text Add to dashboard Cite

Two novel lanthanide metal–organic frameworks (Ln-MOFs), formulated as {[Ln2(L2)2(H2O)5]·3H2O} n (Nd 1 and Eu 2) has been acquired under hydrothermal conditions, in which H3L2 ligand was derived from in situ decarboxylation reaction of H4L1 ligand (H3L2 = 5-(3′,5′-dicarboxylphenyl)picolinic acid, H4L1 = 3-(3′,5′-dicarboxyphenyl)pyridine-2,6-dicarboxylic acid). Both compounds possess (3,4,7)-connected 3,4,7T22 topology with a schläfli symbol of {43}{45·6}{48·69·84}. Compound 2 displays excellent luminescence properties and exhibits good stability in water and other common organic solvents. In particular, 2 can detect Cu2+ ion, MnO4 – anion, and nitrobenzene with a high sensitivity and selectivity through the fluorescence quenching effect. Thus, 2 can be dressed up as a prospective luminescent sensor for detecting Cu2+, MnO4 –, and nitrobenzene.

show abstract

“…Terbium-based Ln-CP 8 shows four emission peaks at 488, 542, 593, and 623 nm, all of which can be attributed to radiative relaxation from the 5 D 4 excited state of Tb 3+ tothe 7 F J state ( J = 6, 5, 4, 3, respectively). − The 5 D 4 → 7 F 5 transition at 542 nm has the highest intensity and contributes the most to the intense green emission in Ln-CP 8 . Excitation spectra of 6 and 8 reveal typical sets of excitation bands for the Eu 3+ and Tb 3+ ions, and assignments of the bands are provided in Figure .…”

Section: Results and Discussionmentioning

confidence: 99%

Lanthanide Contraction in Action: Structural Variations in 13 Lanthanide(III) Thiophene-2,5-dicarboxylate Coordination Polymers (Ln = La–Lu, Except Pm and Tm) Featuring Magnetocaloric Effect, Slow Magnetic Relaxation, and Luminescence-Lifetime-based Thermometry

Kumar

Zarȩba

et al. 2020

Crystal Growth & Design

View full text Add to dashboard Cite

Thirteen new three-dimensional lanthanide(III)-2,5-thiophenedicarboxylate coordination polymers (Ln-CPs) with general formulas of [Ln2(2,5-TDA)3(DMA)2(H2O)] n (Ln-CPs 1–4) and [Ln2(2,5-TDA)3(DMA)2] n (Ln-CPs 5–13) (where 2,5-TDA2– = 2,5-thiophedicarboxylate dianion, DMA = N,N′-dimethylacetamide, and Ln = La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), Tb (8), Dy (9), Ho (10), Er (11), Yb (12) Lu (13)) have been synthesized solvothermally under two different temperature conditions in a DMA–H2O mixed solvent system. A structural analysis discloses that the four Ln-CPs 1–4 crystallize in the orthorhombic space group Pna21, whereas the eight Ln-CPs 5–8 and 10–13 crystallize in the triclinic P̅1 space group and Ln-CP 9 (Dy) adopts the monoclinic P2/c space group. The distinct crystal structures and coordination features indicate that lanthanide contraction, ancillary DMA molecules, and different coordination modes identified for 2,5-TDA2– play deciding roles in the self-assembly of Ln-CPs 1–13. The Ln(III) centers in compounds 1–13 exhibit three different coordination numbers, 9 (only 1; around La1), 8 (1–8 and 10–12), and 7 (4, 8, 9 and 11–13) with monocapped-square-antiprismatic, bicapped-trigonal-prismatic, and monocapped-trigonal-prismatic geometries, respectively. The title compounds display distinct 3D coordination frameworks with dinuclear (La2O15; for 1 and Ln2O14; for 2–4) SBUs and tetranuclear [Ln4O28] SBUs (for compounds 5–13). Variable-temperature magnetic susceptibility measurements were investigated for Ln-CPs 7–11 with an applied dc field of 1 kOe. The weak antiferromagnetic interaction and small ligand/metal mass ratio make Ln-CP 7 (Gd) a good candidate for low-temperature magnetic refrigeration with an impressive −ΔS m max = 31.0 J kg–1 K–1 (63.6 mJ cm–3 K–1) at T = 2 K and ΔH = 7 T. Furthermore, the frequency and temperature dependences of the alternating current (ac) susceptibilities have been studied to explore the magnetic dynamics of Ln-CPs 8–10. Importantly, for compound 9 (Dy), the χ′m and χ″m curves and Cole–Cole plots at 2–6 K suggest the existence of slow magnetic relaxation behavior. Luminescence thermometry studies have been performed at 298–373 K for Ln-CPs 6 and 8. The Eu analogue (6) features a weak temperature dependence of luminescence lifetime (relative sensitivities of 0.43% K–1 and 0.34% K–1 at 298 and 373 K, respectively), whereas the Tb analogue (8) is a good lifetime-based luminescent thermometer with a constant relative sensitivity value of 1.35% K–1 in the investigated temperature range.

show abstract

Self-assembly of lanthanide(iii) coordination polymers from a bifunctional 2-(pyridin-2-yl)-1H-imidazole-4,5-dicarboxylate ligand with the assistance of oxalate: syntheses, structures, luminescence, and magnetic properties

Cited by 28 publications

References 73 publications

High Luminance of Heterolanthanide-Based Molecular Alloys by Phase-Induction Strategy

High Luminance of Heterolanthanide-Based Molecular Alloys by Phase-Induction Strategy

Two Novel Lanthanide Metal–Organic Frameworks: Selective Luminescent Sensing for Nitrobenzene, Cu²⁺, and MnO₄^–

Lanthanide Contraction in Action: Structural Variations in 13 Lanthanide(III) Thiophene-2,5-dicarboxylate Coordination Polymers (Ln = La–Lu, Except Pm and Tm) Featuring Magnetocaloric Effect, Slow Magnetic Relaxation, and Luminescence-Lifetime-based Thermometry

Contact Info

Product

Resources

About

Self-assembly of lanthanide(iii) coordination polymers from a bifunctional 2-(pyridin-2-yl)-1H-imidazole-4,5-dicarboxylate ligand with the assistance of oxalate: syntheses, structures, luminescence, and magnetic properties

Cited by 28 publications

References 73 publications

High Luminance of Heterolanthanide-Based Molecular Alloys by Phase-Induction Strategy

High Luminance of Heterolanthanide-Based Molecular Alloys by Phase-Induction Strategy

Two Novel Lanthanide Metal–Organic Frameworks: Selective Luminescent Sensing for Nitrobenzene, Cu2+, and MnO4–

Lanthanide Contraction in Action: Structural Variations in 13 Lanthanide(III) Thiophene-2,5-dicarboxylate Coordination Polymers (Ln = La–Lu, Except Pm and Tm) Featuring Magnetocaloric Effect, Slow Magnetic Relaxation, and Luminescence-Lifetime-based Thermometry

Contact Info

Product

Resources

About

Two Novel Lanthanide Metal–Organic Frameworks: Selective Luminescent Sensing for Nitrobenzene, Cu²⁺, and MnO₄^–