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Xu L, Hao Y, Yang X, Wang Z, Xu C, Borisova NE, Sun M, Zhang X, Lei L, Xiao C. Comparative Investigation into the Complexation and Extraction Properties of Tridentate and Tetradentate Phosphine Oxide-Functionalized 1,10-Phenanthroline Ligands toward Lanthanides and Actinides. Chemistry 2021; 27:10717-10730. [PMID: 34002918 DOI: 10.1002/chem.202101224] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Indexed: 11/06/2022]
Abstract
Two new phosphine oxide-functionalized 1,10-phenanthroline ligands, tetradentate 2,9-bis(butylphenylphosphine oxide)-1,10-phenanthroline (BuPh-BPPhen, L1 ) and tridentate 2-(butylphenylphosphine oxide)-1,10-phenanthroline (BuPh-MPPhen, L2 ), were synthesized and studied comparatively for their coordination with trivalent actinides and lanthanides. The complexation mechanisms of these two ligands toward trivalent f-block elements were thoroughly elucidated by NMR spectroscopy, UV/vis spectrophotometry, fluorescence spectrometry, single-crystal X-ray diffraction, solvent extraction, and theoretical calculation methods. NMR titration results demonstrated that 1 : 1 and 1 : 2 (metal to ligand) lanthanides complexes formed for L1 , whereas 1 : 1, 1 : 2 and 1 : 3 lanthanide complexes formed for L2 in methanol. The formation of these species was validated by fluorescence spectrometry, and the corresponding stability constants for the complexes of NdIII with L1 and L2 were determined by using UV/vis spectrophotometry. Structures of the 10-coordinated 1 : 1-type complexes of EuL1 (NO3 )3 and [EuL2 (NO3 )3 (H2 O)] Et2 O in the solid state were characterized by X-ray crystallography. In solvent-extraction experiments, L1 exhibited extremely strong extraction ability for both AmIII and EuIII , whereas L2 showed nearly no extraction toward AmIII or EuIII due to its high hydrophilicity. Finally, the structures and bonding natures of the complex species formed between AmIII /EuIII and L1 /L2 were analyzed in DFT calculations.
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Affiliation(s)
- Lei Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yuxun Hao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, 119991, Moscow, Russian Federation
| | - Mingze Sun
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xingwang Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
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Li Y, Yang X, Ren P, Sun T, Shi W, Wang J, Chen J, Xu C. Substituent Effect on the Selective Separation and Complexation of Trivalent Americium and Lanthanides by N,O-Hybrid 2,9-Diamide-1,10-phenanthroline Ligands in Ionic Liquid. Inorg Chem 2021; 60:5131-5139. [PMID: 33769038 DOI: 10.1021/acs.inorgchem.1c00169] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The extraction and complexation of trivalent americium (Am) and lanthanides (Ln) by four 2,9-diamide-1,10-phenanthroline (DAPhen) ligands with different alkyl substituent groups on the diamide moiety in an ionic liquid (IL), C4mimNTf2, were studied through a combination of batch extraction, spectroscopic, and calorimetric approaches. All four DAPhen ligands can achieve selective separation of Am(III) from Eu(III), but the detailed extractability and the extraction kinetics are affected significantly by the length of the alkyl substituent groups. UV-vis absorption spectrophotometric titrations indicate that Ln(III) coordinates with all four ligands in a 1:2 mode in the ionic liquid and the binding strength decreases with the increase of the alkyl chain length. The complexation of the DAPhen ligands with Ln(III) in the ionic liquid is driven by highly positive entropies and opposed by endothermic enthalpies. A luminescence spectroscopy study suggests that each DAPhen ligand coordinates in a tetradentate form with Eu(III). This work further unravels the unique extraction and coordination behavior in an ionic liquid system and offers additional guidelines to design more efficient DAPhen ligands for Ln(III)/An(III) separation.
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Affiliation(s)
- Youzhen Li
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Xiaofan Yang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Peng Ren
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Taoxiang Sun
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Weiqun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jianchen Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, People's Republic of China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, People's Republic of China
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Xu L, Pu N, Ye G, Xu C, Chen J, Zhang X, Lei L, Xiao C. Unraveling the complexation mechanism of actinide(iii) and lanthanide(iii) with a new tetradentate phenanthroline-derived phosphonate ligand. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00200c] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The separation and complexation mechanisms of actinide(iii) and lanthanide(iii) with a new phenanthroline-derived phosphonate ligand were studied experimentally and theoretically.
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Affiliation(s)
- Lei Xu
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ning Pu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Gaoyang Ye
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Chao Xu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Jing Chen
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Xingwang Zhang
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Lecheng Lei
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
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Marets N, Kanno S, Ogata S, Ishii A, Kawaguchi S, Hasegawa M. Lanthanide-Oligomeric Brush Films: From Luminescence Properties to Structure Resolution. ACS OMEGA 2019; 4:15512-15520. [PMID: 31572852 PMCID: PMC6761684 DOI: 10.1021/acsomega.9b01775] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 08/22/2019] [Indexed: 05/17/2023]
Abstract
Lanthanide (Ln) based luminescent materials are experiencing an increasing interest in their applications in several fields. In this study, we report a series of new lanthanide-oligomeric brush films, supported on quartz substrates and prepared using a layer-by-layer method (LbL). Oligomeric brush films are composed of small oligomers from our previously reported coordination polymers [x-EuL] and [x-TbL] (with x = 1, 3, and 5 generations of Ln complexes), which are grown perpendicularly from a carboxylate self-assembled monolayer. Oligomers composed of our previously described helical lanthanide complex LnL (Ln: Eu and Tb) as a luminescent moiety and benzene-1,4-dicarboxylate acid (bdc) used as a linker. Mixed films having the fifth-generation Ln complexes composed of equimolar mixture of Eu and Tb ions were prepared. Oligomeric brush films are highly transparent and exhibited a colored emission under UV irradiation. Pure Ln (Eu or Tb) films showed a strong luminescence from the Ln ions. Their luminescent properties depended on the number of lanthanide layers in the films composed of the first to third generations of lanthanide complexes. Then, the increase of the complex layers induced no difference in the luminescent properties. An energy transfer from Tb to Eu ions in the mixed films indicated a short distance between lanthanide ions of a fifth layer. The structural analysis together with the observed luminescent properties and some previous studies allowed to clarify the disposition of the oligomers in the films.
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Affiliation(s)
- Nicolas Marets
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
| | - Shuhei Kanno
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
| | - Shuhei Ogata
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
| | - Ayumi Ishii
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
- JST,
PRESTO, Kawaguchi, Saitama 332-0012, Japan
- Toin University of Yokohama, Aoba-ku, Yokohama, Kanagawa 225-8508, Japan
| | - Shogo Kawaguchi
- Research
& Utilization Division, Japan Synchrotron
Radiation Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan
| | - Miki Hasegawa
- Department
of Chemistry and Biological Science and Mirai Molecular Materials Design
Institute, Aoyama Gakuin University, Sagamihara, Kanagawa 252-5258, Japan
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