Lanthanide coordination compounds with 2,2′-bipyridine-6,6′-dicarboxylate: Synthesis, crystal structure, luminescence and magnetic property

Ren, Ya-Lan; Wang, Fei; Hu, Huai‐Ming; Chang, Zhuguo; Yang, Menglin; Xue, Ganglin

doi:10.1016/j.ica.2015.05.018

Cited by 21 publications

(2 citation statements)

References 55 publications

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“…As a result, the compound [UO 2 (BiPDA)(DMSO)] was crystallized from the monomeric complex via hydrogen bonds and π–π interactions, while the compound [UO 2 (DmBiPDA)] n was assembled as one-dimensional ribbons. The coordination modes in [UO 2 (DmBiPDA)] n are commonly found in complexes of BiPDA and PhenDA with metal ions, such as Na 2 Ln 2 (BiPDA) 4 (H 2 O) 2 ·3H 2 O (Ln = Gd, Tb, Dy, Ho, Er, and Yb), Ln 3 (BiPDA) 4 (H 2 O) 2 ·12H 2 O (Ln = Ce, Nd, and Pr) and Ln 2 (BiPDA) 3 (H 2 O) 3 ·3H 2 O (Ln = Er and Tm), and [UO 2 (PhenDA)] n · n H 2 O …”

Section: Discussionmentioning

confidence: 99%

Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H₂O Solutions

Yang

Zhang

Yang³

et al. 2019

Inorg. Chem.

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The stability constants (log β) of 1:1 uranyl complexes with three N,O-mixed donor ligands (L = 2,2′-dipyridyl-6,6′-dicarboxylate, 3,3′-dimethyl-2,2′-bipyridine-6,6′-dicarboxylate, and 1,10-phenanthroline-2,9-dicarboxylate, denoted as BiPDA, DmBiPDA, and PhenDA, respectively) in aqueous and DMSO/20%(v)H2O solutions were determined by spectrophotometry in 0.1 M tetraethylammonium perchlorate. The effects of ligand preorganization, steric hindrance, and solvation on the binding strength of U(VI) with the three ligands were discussed. In aqueous solution, PhenDA forms stronger complexes with U(VI) than BiPDA due to its well-preorganized structure. In DMSO/20%(v)H2O solution, in contrast, the strong solvation effect of DMSO on the ligands reduces the energy gap between the trans- and cis-conformations of BiPDA, resulting in log β(UO2(BiPDA)) > log β(UO2(PhenDA)). The steric hindrance of methyl groups on DmBiPDA makes the complex UO2(DmBiPDA) of the lowest stability in both aqueous and DMSO/20%(v)H2O solutions. Single-crystal structural data of U(VI) complexes with the three ligands indicate that the ligand coordinates with UO2 2+ via aromatic nitrogen atoms and carboxylate oxygen atoms. There is no clear correlation between the trend of the stability constants in solutions and the U–N/O bond lengths of the three crystal complexes. Nevertheless, DmBiPDA coordinates to UO2 2+ in a high-strain fashion as a result of the steric hindrance of methyl groups while BiPDA in a low-strain fashion, which is in accordance with the relative complexation strength of the two respective complexes. The results from this work help us understand the effect of ligand preorganization and solvation on the binding strength of actinides with multidentate N,O-mixed ligands in solid and solutions, which is of importance in designing ligands for the partitioning of actinides from nuclear wastes.

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Section: Discussionmentioning

confidence: 99%

Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H₂O Solutions

Yang

Zhang

Yang³

et al. 2019

Inorg. Chem.

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“…It is well-known that the complexation between ligand and metal ion is the chemical basis behind separation in liquid extraction, but limited studies on the complexation of such tetradentate N-O-O-N ligands with lanthanides/actinides in a homogeneous phase and the complex structures in solid have been reported. Borisova and co-workers found that the affinity of different 2,2′-bipyridyl-6,6′-dicarboxamide ligands to lanthanides decreased linearly with increasing atomic number of the lanthanide, and Hancock and co-workers observed that the affinity of 1,10-phenanthroline-2,9-dicarboxamide to lanthanides had a similar but unobvious trend. , However, Hancock and co-workers determined some 1:1 lanthanide and actinide complexes with PhenDA, but did not find a similar trend for the complexation strength. , Moreover, Borisova and Hancock only detected the 1:1 lanthanide complexes with such tetradentate mixed N- and O-donor ligands in solutions, − while the 1:2 lanthanide complexes had been identified by crystallography. ,,− Ogden and co-workers first detected the 1:2 complexes of Nd(III) and Am(III) with PhenDA in aqueous solution, and Makrlík even assumed the existence of the 1:3 complex to interpret the solvent extraction data . What’s more, none of the aforementioned studies analyzed the complexation and its changing trend along the lanthanide series from the thermodynamic origin.…”

Section: Introductionmentioning

confidence: 95%

Complexation of Lanthanides with N,N,N′,N′-Tetramethylamide Derivatives of Bipyridinedicarboxylic Acid and Phenanthrolinedicarboxylic Acid: Thermodynamics and Coordination Modes

Chen¹,

Li²,

Lv³

et al. 2019

Inorg. Chem.

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The thermodynamics of Nd(III) and Eu(III) complexes with N,N,N′,N′-tetramethyl-2,2′-bipyridine-6,6′-dicarboxamide (TMBiPDA) and N,N,N′,N′-tetramethyl-1,10-phenanthroline-2,9-dicarboxamide (TMPhenDA) in CH 3 OH/10%(v)H 2 O solutions were studied. Stability constants and enthalpies of complexation were determined by absorption spectrophotometry, luminescence, and calorimetry. The stability constants of corresponding lanthanide complexes decrease in the order of TMPhenDA > TMBiPDA, while those of the corresponding ligand complexes with lanthanides decrease in the order of Nd(III) > Eu(III). The stepwise reactions for all 1:1 complexes as well as for the 1:2 Nd(III) complexes are driven by both enthalpy and entropy, while those for the 1:2 Eu(III) complexes are driven by entropy. The stronger affinity of TMPhenDA to Nd(III) and Eu(III) than that of TMBiPDA is predominantly arisen from its high preorganization. The spectra of the complexes in solutions are similar, implying that Nd(III) and Eu(III) coordinate with the two ligands in the same mode, which have been validated by 1 H and 13 C NMR titrations using La(III) as lanthanide tracer. The luminescence lifetimes of the Eu(III) complexes with TMBiPDA and TMPhenDA were evaluated by TRLFS. Structures of Nd(III)/TMPhenDA and Eu(III)/TMPhenDA complexes, identified by single-crystal X-ray diffractometry, show that ligand coordinates to metal in a tetradentate mode via two aromatic N-donors and two amide Odonors, and the central cation (Nd(III) or Eu(III)) is 10-coordinated by two whole TMPhenDA and two solvent (water or methanol) molecules. The M−O bond distances are almost identical, while the Nd−N bond distance is shorter than the Eu−O bond.

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Structure, luminescent and thermal properties of two novel lanthanide complexes with 3,4-diethoxybenzoic acid and 5,5′-dimethy-2,2′-bipyridine

Jin

Shen

Ren

et al. 2016

J Therm Anal Calorim

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Lanthanide coordination compounds with 2,2′-bipyridine-6,6′-dicarboxylate: Synthesis, crystal structure, luminescence and magnetic property

Cited by 21 publications

References 55 publications

Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H₂O Solutions

Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H₂O Solutions

Complexation of Lanthanides with N,N,N′,N′-Tetramethylamide Derivatives of Bipyridinedicarboxylic Acid and Phenanthrolinedicarboxylic Acid: Thermodynamics and Coordination Modes

Structure, luminescent and thermal properties of two novel lanthanide complexes with 3,4-diethoxybenzoic acid and 5,5′-dimethy-2,2′-bipyridine

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Lanthanide coordination compounds with 2,2′-bipyridine-6,6′-dicarboxylate: Synthesis, crystal structure, luminescence and magnetic property

Cited by 21 publications

References 55 publications

Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H2O Solutions

Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H2O Solutions

Complexation of Lanthanides with N,N,N′,N′-Tetramethylamide Derivatives of Bipyridinedicarboxylic Acid and Phenanthrolinedicarboxylic Acid: Thermodynamics and Coordination Modes

Structure, luminescent and thermal properties of two novel lanthanide complexes with 3,4-diethoxybenzoic acid and 5,5′-dimethy-2,2′-bipyridine

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Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H₂O Solutions

Complexation of U(VI) with BiPDA, DmBiPDA, and PhenDA: Comparison on Structures and Binding Strengths in Aqueous and DMSO/20%(v)H₂O Solutions