PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ Ions
Detection of the Cu2+ ions is crucial because of its environmental and biological implications. The fluorescent-based organic sensors are not suitable for Cu2+ detection due to their short penetration depth caused by the UV/visible excitation source. Therefore, we have demonstrated a highly sensitiv...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-01-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2020.619764/full |
| _version_ | 1818561192749170688 |
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| author | Shaoshan Su Zhurong Mo Guizhen Tan Hongli Wen Xiang Chen Deshmukh A. Hakeem |
| author_facet | Shaoshan Su Zhurong Mo Guizhen Tan Hongli Wen Xiang Chen Deshmukh A. Hakeem |
| author_sort | Shaoshan Su |
| collection | DOAJ |
| description | Detection of the Cu2+ ions is crucial because of its environmental and biological implications. The fluorescent-based organic sensors are not suitable for Cu2+ detection due to their short penetration depth caused by the UV/visible excitation source. Therefore, we have demonstrated a highly sensitive and selective near-infrared (NIR) excitable poly(acrylic acid) (PAA) coated upconversion nanoparticles (UCNPs) based sensor for Cu2+ detection. We construct the PAA modified Na(Yb, Nd)F4@Na(Yb, Gd)F4:Tm@NaGdF4 core-shell-shell structured UCNPs based sensor via a co-precipitation route. The upconversion emission intensity of the PAA-UCNPs decreases linearly with the increase in the Cu2+ concentration from 0.125 to 3.125 μM due to the copper carboxylate complex formation between Cu2+ and PAA-UCNPs. The calculated detection limit of the PAA-UCNPs based sensor is 0.1 μM. The PAA-UCNPs based sensor is very sensitive and selective toward detecting the Cu2+ ions, even when the Cu2+ co-exist with other metal ions. The EDTA addition has significantly reversed the upconversion emission quenching by forming the EDTA-Cu2+ complex based on their greater affinity toward the Cu2+. Therefore, the PAA-UCNPs based sensor can be a promising candidate for Cu2+ detection because of their higher sensitivity and selectivity under 980 nm NIR excitation. |
| first_indexed | 2024-12-14T00:47:43Z |
| format | Article |
| id | doaj.art-4005d3150858496fabf5141a820bce06 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-14T00:47:43Z |
| publishDate | 2021-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-4005d3150858496fabf5141a820bce062022-12-21T23:24:01ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462021-01-01810.3389/fchem.2020.619764619764PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ IonsShaoshan SuZhurong MoGuizhen TanHongli WenXiang ChenDeshmukh A. HakeemDetection of the Cu2+ ions is crucial because of its environmental and biological implications. The fluorescent-based organic sensors are not suitable for Cu2+ detection due to their short penetration depth caused by the UV/visible excitation source. Therefore, we have demonstrated a highly sensitive and selective near-infrared (NIR) excitable poly(acrylic acid) (PAA) coated upconversion nanoparticles (UCNPs) based sensor for Cu2+ detection. We construct the PAA modified Na(Yb, Nd)F4@Na(Yb, Gd)F4:Tm@NaGdF4 core-shell-shell structured UCNPs based sensor via a co-precipitation route. The upconversion emission intensity of the PAA-UCNPs decreases linearly with the increase in the Cu2+ concentration from 0.125 to 3.125 μM due to the copper carboxylate complex formation between Cu2+ and PAA-UCNPs. The calculated detection limit of the PAA-UCNPs based sensor is 0.1 μM. The PAA-UCNPs based sensor is very sensitive and selective toward detecting the Cu2+ ions, even when the Cu2+ co-exist with other metal ions. The EDTA addition has significantly reversed the upconversion emission quenching by forming the EDTA-Cu2+ complex based on their greater affinity toward the Cu2+. Therefore, the PAA-UCNPs based sensor can be a promising candidate for Cu2+ detection because of their higher sensitivity and selectivity under 980 nm NIR excitation.https://www.frontiersin.org/articles/10.3389/fchem.2020.619764/fullenergy transfercopper ionsfluorescent probepoly(acrylic acid) (PAA)upconversion nanoparticles (UCNPs) |
| spellingShingle | Shaoshan Su Zhurong Mo Guizhen Tan Hongli Wen Xiang Chen Deshmukh A. Hakeem PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ Ions Frontiers in Chemistry energy transfer copper ions fluorescent probe poly(acrylic acid) (PAA) upconversion nanoparticles (UCNPs) |
| title | PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ Ions |
| title_full | PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ Ions |
| title_fullStr | PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ Ions |
| title_full_unstemmed | PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ Ions |
| title_short | PAA Modified Upconversion Nanoparticles for Highly Selective and Sensitive Detection of Cu2+ Ions |
| title_sort | paa modified upconversion nanoparticles for highly selective and sensitive detection of cu2 ions |
| topic | energy transfer copper ions fluorescent probe poly(acrylic acid) (PAA) upconversion nanoparticles (UCNPs) |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2020.619764/full |
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