Structural variations of praseodymium(III) benzoate derivative complexes with dimethylformamide

Zhou, Xianju; Wong, Wing Tak; Hau, Sam C. K.; Tanner, Peter A.

doi:10.1016/j.poly.2014.12.007

Cited by 11 publications

(3 citation statements)

References 29 publications

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“…Absorption spectra were also recorded using a Biorad FTS-60A spectrometer, and these spectra were automatically corrected by the instrument from the background scan. The synthesis and crystal structures of the target compounds have previously been reported; so, the reader is referred to this paper for further details since they are not repeated herein. Relevant data to the present study are collected in Table together with abbreviated names for the complexes.…”

Section: Methodsmentioning

confidence: 99%

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Relation between Ligand Design and Transition Energy for the Praseodymium Ion in Crystals

Zhou

Tanner

2014

J. Phys. Chem. A

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Ten substituted benzoate complexes of Pr(3+) of the type [Pr(XC6H4COO)3(H2O)n(DMF)m]p·(DMF)q (X = OCH3, NO2, OH, F, Cl, NH2) have been synthesized, and for eight of these crystallographic data are available. The electronic absorption and emission spectra of the complexes have been recorded and interpreted at temperatures down to 10 K for transitions involving the (3)P0 and (1)D2 J-multiplet terms. Generally, the electron-withdrawing groups X in the benzoate moiety lead to higher (3)P0 energy than electron-donating groups. Empirical relations have been found between the energies of the (3)P0 and (1)D2(1) levels and the Hammett sigma constants for substituents and the unit cell volume per Pr(3+) ion. The latter relationship is indicative of a correlation between the electronic state energy and the ligand dipole polarizability. This has been confirmed by reference to literature data for the LaX3:Pr(3+) systems, so that the ligand dipole polarizability is a key factor in determining the nephelauxetic shifts of 4f(N) ions in crystals.

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Section: Methodsmentioning

confidence: 99%

“…We have taken advantage of the reported structural data for a series of para-substituted benzoate complexes in order to facilitate our investigation. Syntheses of these complexes and the crystal structures have been reported elsewhere …”

Section: Introductionmentioning

confidence: 99%

Relation between Ligand Design and Transition Energy for the Praseodymium Ion in Crystals

Zhou

Tanner

2014

J. Phys. Chem. A

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“…17,18 Aminobenzoic acid derivatives are one big family of organic linkers frequently used to construct lanthanide extended structures. 19 Lanthanide polymers based on dysprosium (Dy), 20,21 praseodymium (Pr), 22 neodymium (Nd) 21,23 or samarium (Sm), 21 for example, were made from 4-aminobenzoic acid, exhibiting 1D chain-like structures with interesting physical properties. Unique slow magnetic behaviours suggesting single molecule magnets were established in Dy-coordination polymers when linked to 4-aminobenzoic acid, 20 2-methylbenzoic acid 24 or 4-nitrobenzoic acid.…”

Section: Introductionmentioning

confidence: 99%

Lanthanide(iii) (Er/Ho) coordination polymers for a photocatalytic CO₂ cycloaddition reaction

et al. 2023

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Effect of the Introduction of Zn^II and Cd^II Ions on Eu^III and Tb^III Emission in M₂Ln₂ Heterometallic Molecules With 2‐Furoic Acid Anions

Shmelev,

Melnikov,

Nikolaevskii

et al. 2024

Applied Organom Chemis

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Heterometallic d‐4f coordination complexes are of paramount interest in modern coordination chemistry because of their potential applications in organic light‐emitting devices and spintronic materials. Here we report the synthesis and thorough investigation of Ln and MLn (M = Zn, Cd; Ln = Sm, Eu, Gd, Tb) molecular complexes based on 2‐furancarboxylic acid anion (Hfur): [Ln2(NO3)2(fur)4(DME)2] (Ln = Eu, Gd, Tb; DME is dimethoxyethane) and [M2Ln2(NO3)2(fur)8(bpy)2] (M = Zn, Cd; Ln = Eu, Gd, Tb, Sm; bpy is 2,2′‐bipyridyl). The structure and isostructural nature of compounds were determined based on the single‐crystal and powder X‐ray diffraction data. The photophysical properties of the obtained compounds were studied in detail: The energies of the triplet levels of the furoate anion and d‐blocks {M(fur)2(bpy)} (M = Zn, Cd), the relaxation times of the excited states, and the quantum yields were determined. Critical step from Ln complexes to ZnLn and CdLn (Ln = Eu, Tb) is accompanied by an increase in quantum yields, which correlates with a change in the energy of the triplet level of the aromatic part of the complexes and with the results of quantum chemical calculations indicating different schemes for the origination of triplet levels in MLn compounds.

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Structural variations of praseodymium(III) benzoate derivative complexes with dimethylformamide

Cited by 11 publications

References 29 publications

Relation between Ligand Design and Transition Energy for the Praseodymium Ion in Crystals

Relation between Ligand Design and Transition Energy for the Praseodymium Ion in Crystals

Lanthanide(iii) (Er/Ho) coordination polymers for a photocatalytic CO₂ cycloaddition reaction

Effect of the Introduction of Zn^II and Cd^II Ions on Eu^III and Tb^III Emission in M₂Ln₂ Heterometallic Molecules With 2‐Furoic Acid Anions

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Structural variations of praseodymium(III) benzoate derivative complexes with dimethylformamide

Cited by 11 publications

References 29 publications

Relation between Ligand Design and Transition Energy for the Praseodymium Ion in Crystals

Relation between Ligand Design and Transition Energy for the Praseodymium Ion in Crystals

Lanthanide(iii) (Er/Ho) coordination polymers for a photocatalytic CO2 cycloaddition reaction

Effect of the Introduction of ZnII and CdII Ions on EuIII and TbIII Emission in M2Ln2 Heterometallic Molecules With 2‐Furoic Acid Anions

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Lanthanide(iii) (Er/Ho) coordination polymers for a photocatalytic CO₂ cycloaddition reaction

Effect of the Introduction of Zn^II and Cd^II Ions on Eu^III and Tb^III Emission in M₂Ln₂ Heterometallic Molecules With 2‐Furoic Acid Anions