Highly Selective and Portable Fluorescence Turn-On Detection of Sc 3+ in Ore and Water Based on Strong Lewis Acid-Base Coordination
Detecting scandium (Sc) with high selectivity and sensitivity is a challenging task due to its chemical similarity to other rare earth ions. Our findings show that the fluorescence of the complex fluorescent indicator calcein (CL) is quenched under acidic conditions (pH = 2), and Sc strongly inhibit...
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| Vydáno v: | Analytical chemistry (Washington) |
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| Hlavní autoři: | , , , , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
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United States
19.03.2024
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| ISSN: | 1520-6882 |
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| Abstract | Detecting scandium (Sc) with high selectivity and sensitivity is a challenging task due to its chemical similarity to other rare earth ions. Our findings show that the fluorescence of the complex fluorescent indicator calcein (CL) is quenched under acidic conditions (pH = 2), and Sc
strongly inhibits this process. The results demonstrate that CL forms multimers and precipitates out of the solution under acidic conditions, while Sc
causes a significant decrease in the scattering intensity of the solution. Additional experiments revealed that the strong Lewis acid nature of Sc
complexes with the carboxyl groups of CL leads to increased dispersion of CL even under acidic conditions, thus enhancing its absorption and fluorescence. The complexation ratio of Sc
and CL was investigated through spectral titrations and theoretical calculations. The interaction between Sc
and CL is the strongest among rare earth and common metal ions due to the smallest ionic radius, resulting in high selectivity. The fluorescence turn-on strategy had a linear range of 0.04 to 2.25 μM under optimal conditions, with a detection limit of 20 nM for Sc
. The combination of 3D printing and a smartphone program allows for portable on-site analysis of Sc
. Mineral and water samples were used to demonstrate the potential of this strategy for the rapid, selective, and sensitive analysis of low levels of Sc
. |
|---|---|
| AbstractList | Detecting scandium (Sc) with high selectivity and sensitivity is a challenging task due to its chemical similarity to other rare earth ions. Our findings show that the fluorescence of the complex fluorescent indicator calcein (CL) is quenched under acidic conditions (pH = 2), and Sc
strongly inhibits this process. The results demonstrate that CL forms multimers and precipitates out of the solution under acidic conditions, while Sc
causes a significant decrease in the scattering intensity of the solution. Additional experiments revealed that the strong Lewis acid nature of Sc
complexes with the carboxyl groups of CL leads to increased dispersion of CL even under acidic conditions, thus enhancing its absorption and fluorescence. The complexation ratio of Sc
and CL was investigated through spectral titrations and theoretical calculations. The interaction between Sc
and CL is the strongest among rare earth and common metal ions due to the smallest ionic radius, resulting in high selectivity. The fluorescence turn-on strategy had a linear range of 0.04 to 2.25 μM under optimal conditions, with a detection limit of 20 nM for Sc
. The combination of 3D printing and a smartphone program allows for portable on-site analysis of Sc
. Mineral and water samples were used to demonstrate the potential of this strategy for the rapid, selective, and sensitive analysis of low levels of Sc
. |
| Author | Chen, Xueshan Zheng, Chengbin Wei, Yingnan Zhou, Jinyan Wu, Yuke Zhang, Zhankuo Zhang, Jinyi |
| Author_xml | – sequence: 1 givenname: Xueshan surname: Chen fullname: Chen, Xueshan organization: Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610065, China – sequence: 2 givenname: Zhankuo surname: Zhang fullname: Zhang, Zhankuo organization: Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610065, China – sequence: 3 givenname: Yuke surname: Wu fullname: Wu, Yuke organization: Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610065, China – sequence: 4 givenname: Jinyan surname: Zhou fullname: Zhou, Jinyan organization: College of Chemistry and Material Science, Sichuan Normal University, Chengdu, Sichuan 610068, China – sequence: 5 givenname: Yingnan surname: Wei fullname: Wei, Yingnan organization: Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610065, China – sequence: 6 givenname: Jinyi orcidid: 0000-0003-1577-2882 surname: Zhang fullname: Zhang, Jinyi organization: Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610065, China – sequence: 7 givenname: Chengbin orcidid: 0000-0002-7496-8335 surname: Zheng fullname: Zheng, Chengbin organization: Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan 610065, China |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/38456411$$D View this record in MEDLINE/PubMed |
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| CitedBy_id | crossref_primary_10_1016_j_snb_2024_136765 crossref_primary_10_1016_j_ceramint_2025_02_356 crossref_primary_10_1002_smll_202507536 crossref_primary_10_3390_molecules29246041 crossref_primary_10_1016_j_trac_2025_118457 crossref_primary_10_1021_jacs_4c13768 crossref_primary_10_1016_j_micromeso_2024_113348 crossref_primary_10_1021_acs_analchem_5c02146 crossref_primary_10_1021_acsami_5c12871 |
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| Snippet | Detecting scandium (Sc) with high selectivity and sensitivity is a challenging task due to its chemical similarity to other rare earth ions. Our findings show... |
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| Title | Highly Selective and Portable Fluorescence Turn-On Detection of Sc 3+ in Ore and Water Based on Strong Lewis Acid-Base Coordination |
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