Extraction and complexation of trivalent rare earth elements with tetraalkyl diglycolamides
[Display omitted] •The extraction of DGAs towards La3+, Pr3+, Nd3+, Eu3+, Gd3+, Y3+, Er3+ and Yb3+ was systematically investigated.•The extraction thermodynamic parameters (ΔH, ΔS and ΔG) were obtained.•The complexation of DGAs with Eu3+ was explored by means of FT-IR, 1H NMR, Luminescence spectrosc...
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| Veröffentlicht in: | Inorganica Chimica Acta 2020-12, Vol.513, p.119928, Article 119928 |
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| container_title | Inorganica Chimica Acta |
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| creator | Chen, Zhili Yang, Xiuying Song, Lianjun Wang, Xueyu Xiao, Qian Xu, Haowei Feng, Qiuxia Ding, Songdong |
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•The extraction of DGAs towards La3+, Pr3+, Nd3+, Eu3+, Gd3+, Y3+, Er3+ and Yb3+ was systematically investigated.•The extraction thermodynamic parameters (ΔH, ΔS and ΔG) were obtained.•The complexation of DGAs with Eu3+ was explored by means of FT-IR, 1H NMR, Luminescence spectroscopic titration and microcalorimetric titration.•The complexation stability constants and thermodynamic parameters of Eu3+ with DGAs were given.
The extraction and complexation behaviors of four tetraalkyl diglycolamide (TRDGA, where R represents n-butyl, n-hexyl, n-octyl and 2-ethylhexyl) ligands with linear chain or branched chain structure were described with respect to La3+, Pr3+, Nd3+; Eu3+, Gd3+; Y3+, Er3+ and Yb3+ as the representatives of light, middle and heavy rare-earth group ions in HNO3 solution. Effects of acidity, ligand concentration and temperature on the distribution ratio of these ions were examined. High acidity was good for the extraction. For same metal ion, the extractability of DGA ligands followed the order of T2EHDGA |
| doi_str_mv | 10.1016/j.ica.2020.119928 |
| format | Article |
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•The extraction of DGAs towards La3+, Pr3+, Nd3+, Eu3+, Gd3+, Y3+, Er3+ and Yb3+ was systematically investigated.•The extraction thermodynamic parameters (ΔH, ΔS and ΔG) were obtained.•The complexation of DGAs with Eu3+ was explored by means of FT-IR, 1H NMR, Luminescence spectroscopic titration and microcalorimetric titration.•The complexation stability constants and thermodynamic parameters of Eu3+ with DGAs were given.
The extraction and complexation behaviors of four tetraalkyl diglycolamide (TRDGA, where R represents n-butyl, n-hexyl, n-octyl and 2-ethylhexyl) ligands with linear chain or branched chain structure were described with respect to La3+, Pr3+, Nd3+; Eu3+, Gd3+; Y3+, Er3+ and Yb3+ as the representatives of light, middle and heavy rare-earth group ions in HNO3 solution. Effects of acidity, ligand concentration and temperature on the distribution ratio of these ions were examined. High acidity was good for the extraction. For same metal ion, the extractability of DGA ligands followed the order of T2EHDGA < THDGA < TODGA < TBDGA at the same acidity, which was also supported by nuclear magnetic resonance (NMR) analyses. Meanwhile, for different metal ions, their extracted efficiencies by the same DGA ligand increased in the sequence of lanthanide contraction. The average separation factors of adjacent lanthanides within light, middle and heavy rare-earth groups could attain about 2.4, 1.7 and 2.1, respectively. Slope analysis indicated that the formation of predominant 1:3 and 1:2 metal/ligand extracted species for linear chain and branched DGA, respectively. In methanol solution, 1:1, 1:2 and 1:3 Eu3+/DGA species were also observed using fluorescence spectroscopy titration. Fourier transform infrared spectroscopy (FT-IR) analyses suggested that the carbonyl oxygens compared with ether oxygen play a dominant role in coordination. Moreover, the stability constants (log β) and the thermodynamic parameters (ΔH, ΔS and ΔG) for the complexation of Eu3+ with DGAs were also presented.</description><identifier>ISSN: 0020-1693</identifier><identifier>EISSN: 1873-3255</identifier><identifier>DOI: 10.1016/j.ica.2020.119928</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Carbonyls ; Chain branching ; Chains ; Complexation ; Diglycolamide ; Erbium ; Europium ; Fluorescence ; Fourier transforms ; Gadolinium ; Infrared analysis ; Infrared spectroscopy ; Lanthanides ; Ligands ; Metal ions ; Microcalorimetric titration ; NMR ; Nuclear magnetic resonance ; Rare earth ; Rare earth elements ; Solvent extraction ; Spectroscopy titration ; Spectrum analysis ; Stability constants ; Titration ; Ytterbium</subject><ispartof>Inorganica Chimica Acta, 2020-12, Vol.513, p.119928, Article 119928</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier Science Ltd. Dec 1, 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c368t-40db8aea11bfd9e8aacec2a69292c8f14ee00e18911675710b5d3acb089bed583</citedby><cites>FETCH-LOGICAL-c368t-40db8aea11bfd9e8aacec2a69292c8f14ee00e18911675710b5d3acb089bed583</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ica.2020.119928$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,778,782,3539,27911,27912,45982</link.rule.ids></links><search><creatorcontrib>Chen, Zhili</creatorcontrib><creatorcontrib>Yang, Xiuying</creatorcontrib><creatorcontrib>Song, Lianjun</creatorcontrib><creatorcontrib>Wang, Xueyu</creatorcontrib><creatorcontrib>Xiao, Qian</creatorcontrib><creatorcontrib>Xu, Haowei</creatorcontrib><creatorcontrib>Feng, Qiuxia</creatorcontrib><creatorcontrib>Ding, Songdong</creatorcontrib><title>Extraction and complexation of trivalent rare earth elements with tetraalkyl diglycolamides</title><title>Inorganica Chimica Acta</title><description>[Display omitted]
•The extraction of DGAs towards La3+, Pr3+, Nd3+, Eu3+, Gd3+, Y3+, Er3+ and Yb3+ was systematically investigated.•The extraction thermodynamic parameters (ΔH, ΔS and ΔG) were obtained.•The complexation of DGAs with Eu3+ was explored by means of FT-IR, 1H NMR, Luminescence spectroscopic titration and microcalorimetric titration.•The complexation stability constants and thermodynamic parameters of Eu3+ with DGAs were given.
The extraction and complexation behaviors of four tetraalkyl diglycolamide (TRDGA, where R represents n-butyl, n-hexyl, n-octyl and 2-ethylhexyl) ligands with linear chain or branched chain structure were described with respect to La3+, Pr3+, Nd3+; Eu3+, Gd3+; Y3+, Er3+ and Yb3+ as the representatives of light, middle and heavy rare-earth group ions in HNO3 solution. Effects of acidity, ligand concentration and temperature on the distribution ratio of these ions were examined. High acidity was good for the extraction. For same metal ion, the extractability of DGA ligands followed the order of T2EHDGA < THDGA < TODGA < TBDGA at the same acidity, which was also supported by nuclear magnetic resonance (NMR) analyses. Meanwhile, for different metal ions, their extracted efficiencies by the same DGA ligand increased in the sequence of lanthanide contraction. The average separation factors of adjacent lanthanides within light, middle and heavy rare-earth groups could attain about 2.4, 1.7 and 2.1, respectively. Slope analysis indicated that the formation of predominant 1:3 and 1:2 metal/ligand extracted species for linear chain and branched DGA, respectively. In methanol solution, 1:1, 1:2 and 1:3 Eu3+/DGA species were also observed using fluorescence spectroscopy titration. Fourier transform infrared spectroscopy (FT-IR) analyses suggested that the carbonyl oxygens compared with ether oxygen play a dominant role in coordination. Moreover, the stability constants (log β) and the thermodynamic parameters (ΔH, ΔS and ΔG) for the complexation of Eu3+ with DGAs were also presented.</description><subject>Carbonyls</subject><subject>Chain branching</subject><subject>Chains</subject><subject>Complexation</subject><subject>Diglycolamide</subject><subject>Erbium</subject><subject>Europium</subject><subject>Fluorescence</subject><subject>Fourier transforms</subject><subject>Gadolinium</subject><subject>Infrared analysis</subject><subject>Infrared spectroscopy</subject><subject>Lanthanides</subject><subject>Ligands</subject><subject>Metal ions</subject><subject>Microcalorimetric titration</subject><subject>NMR</subject><subject>Nuclear magnetic resonance</subject><subject>Rare earth</subject><subject>Rare earth elements</subject><subject>Solvent extraction</subject><subject>Spectroscopy titration</subject><subject>Spectrum analysis</subject><subject>Stability constants</subject><subject>Titration</subject><subject>Ytterbium</subject><issn>0020-1693</issn><issn>1873-3255</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9UMtOwzAQtBBIlMIHcIvEOcWO87DFCVXlIVXiAicO1sbegEMexXah_XtcwpnTamZnZldDyCWjC0ZZed0urIZFRrOImZSZOCIzJiqe8qwojsmMxk3KSslPyZn3LaWclryYkdfVLjjQwY5DAoNJ9NhvOtzBLzE2SXD2CzocQuLAYYLgwnuCHfaR8sm3jShgTIDuY98lxr51ez120FuD_pycNNB5vPibc_Jyt3pePqTrp_vH5e061bwUIc2pqQUgMFY3RqIA0KgzKGUmMy0aliNSikxIxsqqqBitC8NB11TIGk0h-JxcTbkbN35u0QfVjls3xJMqyyuZC1bxIqrYpNJu9N5hozbO9uD2ilF16FC1KnaoDh2qqcPouZk8GN__suiU1xYHjcY61EGZ0f7j_gH_Rntu</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Chen, Zhili</creator><creator>Yang, Xiuying</creator><creator>Song, Lianjun</creator><creator>Wang, Xueyu</creator><creator>Xiao, Qian</creator><creator>Xu, Haowei</creator><creator>Feng, Qiuxia</creator><creator>Ding, Songdong</creator><general>Elsevier B.V</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20201201</creationdate><title>Extraction and complexation of trivalent rare earth elements with tetraalkyl diglycolamides</title><author>Chen, Zhili ; Yang, Xiuying ; Song, Lianjun ; Wang, Xueyu ; Xiao, Qian ; Xu, Haowei ; Feng, Qiuxia ; Ding, Songdong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c368t-40db8aea11bfd9e8aacec2a69292c8f14ee00e18911675710b5d3acb089bed583</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Carbonyls</topic><topic>Chain branching</topic><topic>Chains</topic><topic>Complexation</topic><topic>Diglycolamide</topic><topic>Erbium</topic><topic>Europium</topic><topic>Fluorescence</topic><topic>Fourier transforms</topic><topic>Gadolinium</topic><topic>Infrared analysis</topic><topic>Infrared spectroscopy</topic><topic>Lanthanides</topic><topic>Ligands</topic><topic>Metal ions</topic><topic>Microcalorimetric titration</topic><topic>NMR</topic><topic>Nuclear magnetic resonance</topic><topic>Rare earth</topic><topic>Rare earth elements</topic><topic>Solvent extraction</topic><topic>Spectroscopy titration</topic><topic>Spectrum analysis</topic><topic>Stability constants</topic><topic>Titration</topic><topic>Ytterbium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Zhili</creatorcontrib><creatorcontrib>Yang, Xiuying</creatorcontrib><creatorcontrib>Song, Lianjun</creatorcontrib><creatorcontrib>Wang, Xueyu</creatorcontrib><creatorcontrib>Xiao, Qian</creatorcontrib><creatorcontrib>Xu, Haowei</creatorcontrib><creatorcontrib>Feng, Qiuxia</creatorcontrib><creatorcontrib>Ding, Songdong</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Inorganica Chimica Acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Zhili</au><au>Yang, Xiuying</au><au>Song, Lianjun</au><au>Wang, Xueyu</au><au>Xiao, Qian</au><au>Xu, Haowei</au><au>Feng, Qiuxia</au><au>Ding, Songdong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Extraction and complexation of trivalent rare earth elements with tetraalkyl diglycolamides</atitle><jtitle>Inorganica Chimica Acta</jtitle><date>2020-12-01</date><risdate>2020</risdate><volume>513</volume><spage>119928</spage><pages>119928-</pages><artnum>119928</artnum><issn>0020-1693</issn><eissn>1873-3255</eissn><abstract>[Display omitted]
•The extraction of DGAs towards La3+, Pr3+, Nd3+, Eu3+, Gd3+, Y3+, Er3+ and Yb3+ was systematically investigated.•The extraction thermodynamic parameters (ΔH, ΔS and ΔG) were obtained.•The complexation of DGAs with Eu3+ was explored by means of FT-IR, 1H NMR, Luminescence spectroscopic titration and microcalorimetric titration.•The complexation stability constants and thermodynamic parameters of Eu3+ with DGAs were given.
The extraction and complexation behaviors of four tetraalkyl diglycolamide (TRDGA, where R represents n-butyl, n-hexyl, n-octyl and 2-ethylhexyl) ligands with linear chain or branched chain structure were described with respect to La3+, Pr3+, Nd3+; Eu3+, Gd3+; Y3+, Er3+ and Yb3+ as the representatives of light, middle and heavy rare-earth group ions in HNO3 solution. Effects of acidity, ligand concentration and temperature on the distribution ratio of these ions were examined. High acidity was good for the extraction. For same metal ion, the extractability of DGA ligands followed the order of T2EHDGA < THDGA < TODGA < TBDGA at the same acidity, which was also supported by nuclear magnetic resonance (NMR) analyses. Meanwhile, for different metal ions, their extracted efficiencies by the same DGA ligand increased in the sequence of lanthanide contraction. The average separation factors of adjacent lanthanides within light, middle and heavy rare-earth groups could attain about 2.4, 1.7 and 2.1, respectively. Slope analysis indicated that the formation of predominant 1:3 and 1:2 metal/ligand extracted species for linear chain and branched DGA, respectively. In methanol solution, 1:1, 1:2 and 1:3 Eu3+/DGA species were also observed using fluorescence spectroscopy titration. Fourier transform infrared spectroscopy (FT-IR) analyses suggested that the carbonyl oxygens compared with ether oxygen play a dominant role in coordination. Moreover, the stability constants (log β) and the thermodynamic parameters (ΔH, ΔS and ΔG) for the complexation of Eu3+ with DGAs were also presented.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.ica.2020.119928</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Carbonyls Chain branching Chains Complexation Diglycolamide Erbium Europium Fluorescence Fourier transforms Gadolinium Infrared analysis Infrared spectroscopy Lanthanides Ligands Metal ions Microcalorimetric titration NMR Nuclear magnetic resonance Rare earth Rare earth elements Solvent extraction Spectroscopy titration Spectrum analysis Stability constants Titration Ytterbium |
| title | Extraction and complexation of trivalent rare earth elements with tetraalkyl diglycolamides |
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