Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphates
Under heat-free conditions, three wheel-shaped [P8W48O184]40− ({P8W48})-based polyoxometalates (POMs) were controllably synthesized via the reaction of a hexavacant Dawson-type tungstophosphate, K12[H2P2W12O48]·24H2O (K-{P2W12}), with simple transition metal (TM) (TM = Mn, Co, and Ni) salts in room...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2025-03-01
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| Series: | Polyoxometalates |
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| Online Access: | https://www.sciopen.com/article/10.26599/POM.2024.9140073 |
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| author | Wen-Da Liu Hao-Tian Zhu Xue Zhang Fang Su Xiao-Jing Sang Xiao-Lan Zhang Lan-Cui Zhang |
| author_facet | Wen-Da Liu Hao-Tian Zhu Xue Zhang Fang Su Xiao-Jing Sang Xiao-Lan Zhang Lan-Cui Zhang |
| author_sort | Wen-Da Liu |
| collection | DOAJ |
| description | Under heat-free conditions, three wheel-shaped [P8W48O184]40− ({P8W48})-based polyoxometalates (POMs) were controllably synthesized via the reaction of a hexavacant Dawson-type tungstophosphate, K12[H2P2W12O48]·24H2O (K-{P2W12}), with simple transition metal (TM) (TM = Mn, Co, and Ni) salts in room temperature aqueous solutions. The molecular formulas of the POMs were Na24[Mn8(H2O)32P8W48O184]·58H2O (1), K4Na16H4[Co8(H2O)32P8W48O184]·76H2O (2), and Na20H4[Ni8(H2O)32P8W48O184]·72H2O (3). It should be noted that eight TM ions introduced into each POM skeleton were connected in a {P8W48} wheel. To the best of our knowledge, this is the first time that the self-assembly of 3d-TM-{P8W48} with the internal coordination of all metals in an aqueous solution was achieved without heating. Compounds 1–3 were characterized by elemental, single-crystal X-ray diffraction, and other physical and spectral analyses, and their nonenzymatic electrochemical sensing performance for hydrogen peroxide (H2O2) was investigated by cyclic voltammetry. Compared with K28Li5[H7P8W48O184]·92H2O without 3d-TM and most reported POM electrode materials, the proposed 3d-TM-{P8W48} POMs exhibited higher stability and better activity during H2O2 detection. Composite films formed using 1–3 and chitosan (CS) on a glassy carbon electrode exhibited a high sensitivity (1.21 μA∙mmol∙L−1), low detection limit (0.02 mmol∙L−1), and rapid response time (2 s) for H2O2 detection. The study findings show that the combination of CS and 1–3 provides an alternative to soluble TM-{P8W48} compounds, which are not reusable in H2O2 detection systems. |
| format | Article |
| id | doaj-art-96bf89dec6d64f1cb9007165d2357287 |
| institution | Kabale University |
| issn | 2957-9821 2957-9503 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Polyoxometalates |
| spelling | doaj-art-96bf89dec6d64f1cb9007165d23572872025-01-24T08:12:25ZengTsinghua University PressPolyoxometalates2957-98212957-95032025-03-0141914007310.26599/POM.2024.9140073Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphatesWen-Da Liu0Hao-Tian Zhu1https://orcid.org/0009-0007-3035-5661Xue Zhang2Fang Su3https://orcid.org/0000-0002-3900-889XXiao-Jing Sang4Xiao-Lan Zhang5Lan-Cui Zhang6https://orcid.org/0000-0001-6352-9292School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaSchool of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, ChinaUnder heat-free conditions, three wheel-shaped [P8W48O184]40− ({P8W48})-based polyoxometalates (POMs) were controllably synthesized via the reaction of a hexavacant Dawson-type tungstophosphate, K12[H2P2W12O48]·24H2O (K-{P2W12}), with simple transition metal (TM) (TM = Mn, Co, and Ni) salts in room temperature aqueous solutions. The molecular formulas of the POMs were Na24[Mn8(H2O)32P8W48O184]·58H2O (1), K4Na16H4[Co8(H2O)32P8W48O184]·76H2O (2), and Na20H4[Ni8(H2O)32P8W48O184]·72H2O (3). It should be noted that eight TM ions introduced into each POM skeleton were connected in a {P8W48} wheel. To the best of our knowledge, this is the first time that the self-assembly of 3d-TM-{P8W48} with the internal coordination of all metals in an aqueous solution was achieved without heating. Compounds 1–3 were characterized by elemental, single-crystal X-ray diffraction, and other physical and spectral analyses, and their nonenzymatic electrochemical sensing performance for hydrogen peroxide (H2O2) was investigated by cyclic voltammetry. Compared with K28Li5[H7P8W48O184]·92H2O without 3d-TM and most reported POM electrode materials, the proposed 3d-TM-{P8W48} POMs exhibited higher stability and better activity during H2O2 detection. Composite films formed using 1–3 and chitosan (CS) on a glassy carbon electrode exhibited a high sensitivity (1.21 μA∙mmol∙L−1), low detection limit (0.02 mmol∙L−1), and rapid response time (2 s) for H2O2 detection. The study findings show that the combination of CS and 1–3 provides an alternative to soluble TM-{P8W48} compounds, which are not reusable in H2O2 detection systems.https://www.sciopen.com/article/10.26599/POM.2024.9140073polyoxometalatewheel-typeroom-temperature synthesiselectrochemical sensingh2o2 detection |
| spellingShingle | Wen-Da Liu Hao-Tian Zhu Xue Zhang Fang Su Xiao-Jing Sang Xiao-Lan Zhang Lan-Cui Zhang Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphates Polyoxometalates polyoxometalate wheel-type room-temperature synthesis electrochemical sensing h2o2 detection |
| title | Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphates |
| title_full | Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphates |
| title_fullStr | Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphates |
| title_full_unstemmed | Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphates |
| title_short | Room temperature self-assembly and nonenzymatic electrochemical sensing performance of transition metal-embedded wheel-shaped tungstophosphates |
| title_sort | room temperature self assembly and nonenzymatic electrochemical sensing performance of transition metal embedded wheel shaped tungstophosphates |
| topic | polyoxometalate wheel-type room-temperature synthesis electrochemical sensing h2o2 detection |
| url | https://www.sciopen.com/article/10.26599/POM.2024.9140073 |
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