Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bonds
Silver-modified polyniobotungstate based on Nb/W mixed-addendum polyoxometalate with formula Ag9[P2W15Nb3O62]·21H2O (Ag-Nb/W) was synthesized and then characterized by various analytical and spectral techniques. Ag-Nb/W was proven to be an efficient photocatalyst for the oxidative ring opening of 2-...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2023-06-01
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| Series: | Polyoxometalates |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/POM.2023.9140024 |
| _version_ | 1797801070177550336 |
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| author | Shujun Li Na Li Gang Li Yubin Ma Mengyao Huang Qingchun Xia Qianyi Zhao Xuenian Chen |
| author_facet | Shujun Li Na Li Gang Li Yubin Ma Mengyao Huang Qingchun Xia Qianyi Zhao Xuenian Chen |
| author_sort | Shujun Li |
| collection | DOAJ |
| description | Silver-modified polyniobotungstate based on Nb/W mixed-addendum polyoxometalate with formula Ag9[P2W15Nb3O62]·21H2O (Ag-Nb/W) was synthesized and then characterized by various analytical and spectral techniques. Ag-Nb/W was proven to be an efficient photocatalyst for the oxidative ring opening of 2-phenylimidazo[1,2-a]pyridine via the simultaneous cleavage of C–C and C–N bonds. Under visible light (430–440 nm) and with oxygen as an oxidant at room temperature, Ag-Nb/W can catalyze the rapid transformation of various 2-phenylimidazo[1,2-a]pyridine derivatives to produce the corresponding oxidative ring-opening product N-(pyridin-2-yl) amides in good isolated yields ranging from 65% to 78%. As a heterogeneous photocatalyst, Ag-Nb/W showed excellent sustainability and recyclability in the recycling experiments. Infrared (IR) spectroscopy and X-ray diffraction (XRD) analysis indicated that Ag-Nb/W could retain its integrity after catalysis. A possible mechanism involving the singlet oxygen for the catalytic reaction was proposed. |
| first_indexed | 2024-03-13T04:44:49Z |
| format | Article |
| id | doaj.art-ce101fb702db4b5a852fe83e90ba56a1 |
| institution | Directory Open Access Journal |
| issn | 2957-9821 2957-9503 |
| language | English |
| last_indexed | 2024-03-13T04:44:49Z |
| publishDate | 2023-06-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Polyoxometalates |
| spelling | doaj.art-ce101fb702db4b5a852fe83e90ba56a12023-06-19T03:59:46ZengTsinghua University PressPolyoxometalates2957-98212957-95032023-06-01229140024914002410.26599/POM.2023.9140024Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bondsShujun Li0https://orcid.org/0000-0002-6230-4806Na Li1Gang Li2Yubin Ma3Mengyao Huang4Qingchun Xia5Qianyi Zhao6https://orcid.org/0000-0002-4113-3155Xuenian Chen7https://orcid.org/0000-0001-9029-1777School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSchool of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang 453007, ChinaSilver-modified polyniobotungstate based on Nb/W mixed-addendum polyoxometalate with formula Ag9[P2W15Nb3O62]·21H2O (Ag-Nb/W) was synthesized and then characterized by various analytical and spectral techniques. Ag-Nb/W was proven to be an efficient photocatalyst for the oxidative ring opening of 2-phenylimidazo[1,2-a]pyridine via the simultaneous cleavage of C–C and C–N bonds. Under visible light (430–440 nm) and with oxygen as an oxidant at room temperature, Ag-Nb/W can catalyze the rapid transformation of various 2-phenylimidazo[1,2-a]pyridine derivatives to produce the corresponding oxidative ring-opening product N-(pyridin-2-yl) amides in good isolated yields ranging from 65% to 78%. As a heterogeneous photocatalyst, Ag-Nb/W showed excellent sustainability and recyclability in the recycling experiments. Infrared (IR) spectroscopy and X-ray diffraction (XRD) analysis indicated that Ag-Nb/W could retain its integrity after catalysis. A possible mechanism involving the singlet oxygen for the catalytic reaction was proposed.https://www.sciopen.com/article/10.26599/POM.2023.9140024bond cleavagepolyniobotungstatepolyoxometalatesphotocatalyst |
| spellingShingle | Shujun Li Na Li Gang Li Yubin Ma Mengyao Huang Qingchun Xia Qianyi Zhao Xuenian Chen Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bonds Polyoxometalates bond cleavage polyniobotungstate polyoxometalates photocatalyst |
| title | Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bonds |
| title_full | Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bonds |
| title_fullStr | Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bonds |
| title_full_unstemmed | Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bonds |
| title_short | Silver-modified polyniobotungstate for the visible light-induced simultaneous cleavage of C–C and C–N bonds |
| title_sort | silver modified polyniobotungstate for the visible light induced simultaneous cleavage of c c and c n bonds |
| topic | bond cleavage polyniobotungstate polyoxometalates photocatalyst |
| url | https://www.sciopen.com/article/10.26599/POM.2023.9140024 |
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