HYDROMETALLURGY
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2022
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IF 4.217
Xiayu Liang,Qingle Zeng
Samarium (Sm), as one of the lanthanide elements, has a broad application prospect in the synthesis of samarium cobalt permanent magnet materials with high temperature stability, corrosion resistance and oxidation resistance . Due to the unlimited demand of Sm(III), recycling of Sm(III) waste is an effective method to balance economy and supply. In this paper, three novel morpholine carboxylic acid ionic liquids (ILs) were rationally designed and successfully synthesized for the extraction of Sm(III). The effects of alkyl chain length of the ionic liquids, solution acidity, contact time, extractant concentration and temperature were tested in terms of the extraction performances. The results revealed that [(CH 2 ) 7 COOHmor][NTf 2 ] had the optimal extraction capacity, as well as the extraction efficiency of Sm increased with the increase of pH, reaching >99.9% when the pH was 1.8. In addition, the extraction equilibrium could be achieved within 1 min. Moreover, the slope analysis and FTIR spectral studies proposed a cation exchange extraction mechanism for Sm(III) by [(CH 2 ) 7 COOHmor][NTf 2 ]. The loaded Sm(III) in organic phase was easy to strip with 0.05 mol/L of HNO 3 , and the [(CH 2 ) 7 COOHmor][NTf 2 ] remained stable after 5 cycles. The research of transition metal extraction revealed that Sm(III) could be selectively separated from Ni(II) and Co(II) by adjusting the pH value of the solution. Finally, under the optimized extraction conditions, Sm 2 O 3 with 83.9% yield was obtained by the extraction-stripping-precipitation-calcination process, through the large-scale recovery applications of the simulated waste liquid .
研究领域:
化学工程
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材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL SCIENCES
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2022
·Vol. 134
·期 3
·1-11
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IF 2.15
LIU XIAOJUAN,LI MINGMING,YANG SHUMING,YANG YAYA,NIE JIANG,XUE YUBING,OUYANG YINGGEN,XIAO SONGTAO
The increasing demand for neodymium (III) and samarium (III) due to their extensive high-tech applications has drawn much attention to their recovery. In this work, the copper-based metal-organic framework HKUST-1 was prepared and used for the adsorption of neodymium (III) and samarium (III) in the media of an aqueous solution. The maximum adsorption capacity of the material for neodymium (III) and samarium (III) was 284.11 and 503.45 mg g −1 at a pH of 5.5, respectively. The adsorption removal rate could achieve nearly 100% at the solid-to-liquid ratio of 1.0 g L −1 , which is relatively excellent among such adsorbents used for rare earth elements uptake. The mechanism and reversibility of neodymium (III) and samarium (III) adsorption were systematically investigated by X-ray diffraction, Fourier transforms infrared spectroscopy, Raman spectra, and X-ray photoelectron spectroscopy, suggesting that the mechanism for the adsorption was ion exchange and complexation between trivalent rare-earth ions and the oxygen atom in the hydroxyl group. The reason behind the material displaying a more robust affinity for samarium (III) may be caused by the energy difference between f n and f n+1 states of samarium (III) was larger than that of neodymium (III), thus forming stronger covalent bonding. Graphical abstract HKUST-1 exhibited high adsorption capacity towards Nd (III) and Sm (III). The reason behind the material displaying a more robust affinity for Sm(III) was caused by that the energy difference between f n and f n+1 states of Sm(III) was larger than that of Nd(III), thus forming stronger covalent bonding.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF STRUCTURAL CHEMISTRY
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2022
·Vol. 63
·期 6
·845-853
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IF 1.004
Chen X.,Gao R. -L.,Li B.,Wang H. -M.
Abstract Reaction of SmCl 3 ·6H 2 O with 3 equiv. of dihydroxodiphenylarsonium chloride [Ph 2 As(OH) 2 ]Cl resulted in the first structurally characterized lanthanide complex of organoarsinate [Sm(μ-O 2 AsPh 2 ) 3 ]. Single crystal X-ray diffraction reveals that this complex belongs to the trigonal system, \(R\bar{3}\) space group, with a = 24.077(3) Å, b = 24.077(3) Å, c = 10.708(1) Å, β = 120°, V = 5375.8(1) Å 3 and Z = 6. This homoleptic compound features a 1D polymer arrangement in which two Sm atoms are bridged by three diphenylarsinate [Ph 2 AsO 2 ] – ligands under syn,syn μ 2 –η 1 :η 1 bridging mode. The coordination number of Sm center is 6, giving an almost perfect octahedron geometry. The antibacterial activity of [Sm(μ-O 2 AsPh 2 ) 3 ] is much weaker than the free ligand [Ph 2 As(OH) 2 ]Cl.
研究领域:
无机化学
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生物化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2015
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IF 4.642
Yuehua Chen,Huiyong Wang,Yuanchao Pei,Jiao Ren,Jianji Wang
The recovery of rare-earth metals from waste materials is very important due to the risks associated with having a low supply of them in the future. In this work, hydrophobic 1-alkylcarboxylic acid-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids, [(CH2)nCOOHmin][Tf2N] (n = 3, 5, 7), were synthesized and used to separate neodymium (III) from Fe(III) and samarium (III) from Co(II) in aqueous solutions. The factors affecting the solvent extraction process such as phase volume ratio, contact time, pH value of the aqueous phase, alkyl chain length of the ionic liquids, and temperature of the system were examined systematically. It was found that the maxmium extraction efficiency of the investigated metal ions was as high as 99%, and Sm(III) and Nd(III) could be selectively separated from Co(II) and Fe(III), with separation factors of 104–105, by simply modulation of the aqueous phase pH. After extraction, about 97% of the metal ions could be stripped from ionic liquid phase in a single stripping step by using dilute aqueous HCl or oxalic acid, and the ionic liquids would be recovered and reused in the next extraction process. These results indicate that the ionic liquids developed here are useful for the selective recovery of rare-earth metals from NdFeB and SmCo permanent magnets.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Kaixuan Shao,Shicong Pei,Zhuqing Li,Xiaojun She,Yuqing Yang,Hongrui Hu,Mingdi Yang,Kehua Zhang,Hang Li,Ping Wang,Yunsheng Ding,Xianhai Hu
Polymeric rare earth complexes have attracted much attention due to their unique luminescence properties and application prospects. However, as an important component of polymeric rare earth complexes, Sm (III) complexes are rarely reported due to the lack of organic ligands matching the energy of Sm (III). Herein, A novel Sm(III) complexes (Sm(MPon) 3 APhen) emitting red fluorescence is synthesized by using Sm(III) as the central ion and 1-(4- tert -butylphenyl)-3-(4-methoxyphenyl)-1,3-propanone (MPon) and 5-amino-1,10-phenanroline (APhen) as ligands, respectively. Then, A novel waterborne polyurethane-based complex [Sm(MP) 3 AP] x -WPU with orange-red fluorescence is prepared by modified acetone method using Sm(MPon) 3 APhen as the end-blocking agent. Compared with Sm(MPon) 3 APhen, the fluorescence emission peak of [Sm(MP) 3 AP] x -WPU is blue-shifted, and the fluorescence intensity is significantly enhanced with the increase of the amount of Sm(MPon) 3 APhen. Notably, the strongest fluorescence emission peak of [Sm(MP) 3 AP] x -WPU is located in the red light band with the highest photosynthetic absorption efficiency of plants, which could significantly improve the light environment for plant growth and promote plant growth. More importantly, [Sm(MP) 3 AP] x -WPU is water as a dispersed phase, which is particularly safe and environmentally friendly during storage, transportation and use.
研究领域:
材料科学
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植物学
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环境科学
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DOI
高影响因子
Analytical Methods
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2022
·Vol. 15
·期 3
·361-367
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IF 3.532
Chengjian Zhang,Sichen Li,Ruijie Zheng,Shengdi Tai,Kang Yang,Kun Zhang
Lower alcohols (C1–C7) have a close relationship with our lives and some of them are harmful to our body's health. For example, liquor mixed with a tiny amount of methanol is harmful to our health. Much of this study is about identifying one or two low-level alcohols. How to detect low-level alcohol and high-throughput and distinguish between analogues of alcohol remains a tremendous challenge. In this study, a new large ring Schiff base Sm(III) complex (Sm-2r) is synthesized with a double emission matrix using the template method. Its dynamic imine bond (CN) and organic ligands (H2L2r) with molecular rotor properties can respond to changes in viscosity and polarity in external environments. The PCA method is used to turn the data matrix into a fingerprint spectrum to distinguish different alcohols (C1–C7). Sm-2r enables the quantization of cyclopropyl and glycerol. Linear ranges of cyclopropanol and glycerol are 0–9.0% and 0–3.0% (v/v), respectively. In addition, Sm-2r has an excellent ability to distinguish the mixtures of n-PrOH and i-PrOH, C5H9OH and C6H11OH, n-PeOH and n-HeOH, 1,3-PDO and 1,2-PDO, MeOH and EtOH, 1,2-EG and 1,2-PDO at different volume ratios. We have provided a way to distinguish alcohol species based on their molecular polarity and viscosity.
研究领域:
分析化学
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生物医学
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产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2020
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IF 5.977
Kun Zhang,Yan Huang,Yin-Jing Shen,Lin-Feng Zhang,Shuang Ma,Ting-Ting Chen,Ziqiang Zheng,Shishen Zhang,Benxia Li
Herein, we report our strategy to develop the efficient chemosensor and real-time monitoring technique for cyanuric chloride (TCT) detection. A luminescent macrocyclic mononuclear Sm(III) complex Sm - 2 k bearing with two dynamic imine bonds has been constructed via the template synthesis between dialdehyde H 2 Q k and matched diamine 1,2-bis(2-aminoethoxy)ethane. Sensing experiments reveal that complex Sm - 2 k exhibits the turn-off fluorescent and colorimetric response for TCT in CH 3 OH. It is especially encouraging that this optical sensing process is not only rapid within 60 s but also high-efficient in the presence of TCT analogues as well as sensitive with the low limit of detection (LOD, 1.74 μM) and wide linear sensing range. Mechanism studies demonstrate that TCT sensing is mainly based on the imine bond transformation of probe Sm - 2 k , which is due to the increased acidity induced by TCT. Meanwhile, a smartphone-based analytical method was developed to make complex Sm - 2 k accessible for the real-time TCT detection by RGB value outputs. It is believed that this work can shed some constructive lights on design of chemosensors and convenient detection technique for highly reactive analytes.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANICA CHIMICA ACTA
·
2021
·
IF 2.545
Yan-Lan Sun,Fen-Mei Zhou,Zhen-Jing Chi,Yu-Lei Zhang,Rui-Rui Zhang
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( https://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the editors. In investigating concerns brought up regarding the authenticity of the article, the editors reached out to the corresponding author for an explanation. Despite several attempts in requesting clarification on the concerns, the authors have not replied to the editors’ requests. The editors therefore feel that the findings of the manuscript cannot be relied upon and that the article needs to be retracted.
研究领域:
医学
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药理学
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2021
·
IF 1.751
Jia-Qi Li,He Wang,Chun Li,Fan-Ming Zeng,Chuan-Bi Li,Zhong-Min Su
A new Sm(III) coordination complex, [Sm(DHTA)4(H2O)3]n, was synthesized with 2,5-dihydroxyterephthalic acid (H2DHTA) as ligand. The crystal structure and properties were characterized by single crystal X-ray diffraction, IR, elemental analysis and TGA analysis. The single-crystal X-ray diffraction analysis showed that Sm(III) ion is nine-coordinate with six oxygen atoms of four DHTA ligands and three oxygen atoms of three H2O molecules, forming a tri-capped trigonal-prism configuration. The adjacent units of the complex are extended into a 3 D supramolecular network. In the IR spectrum of the complex, there are asymmetric and symmetric stretching vibrations of C = O of the carboxyl group. The complex has two weight loss steps in the TG plot. The complex’s UV-Vis absorptions at 400 and 261 nm are attributed to the DHTA. Furthermore, there is a fluorescent maximum emission at 476 nm, which is derived from the ligand. The fluorescence is attributed to the ligand-ligand charge transfer of the complex.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
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