Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism
An electrofluorochromic (EFC) conjugated copolymer (PEFC) containing carbazole and benzothiadiazole (BTD) moieties is synthesized through Suzuki coupling followed by electrochemical polymerization, resulting in a nanoporous EFC polymer electrode. The electrode exhibits high sensitivity and selectivi...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/105312 http://hdl.handle.net/10220/20685 |
| _version_ | 1826112370123997184 |
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| author | Ding, Guoqiang Lin, TingTing Zhou, Rui Dong, Yuliang Xu, Jianwei Lu, Xuehong |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Ding, Guoqiang Lin, TingTing Zhou, Rui Dong, Yuliang Xu, Jianwei Lu, Xuehong |
| author_sort | Ding, Guoqiang |
| collection | NTU |
| description | An electrofluorochromic (EFC) conjugated copolymer (PEFC) containing carbazole and benzothiadiazole (BTD) moieties is synthesized through Suzuki coupling followed by electrochemical polymerization, resulting in a nanoporous EFC polymer electrode. The electrode exhibits high sensitivity and selectivity in the EFC detection of cyanide anions (CN−) in largely aqueous electrolyte (67 vol % water) because electrochemical oxidation of PEFC leads to significant fluorescence quenching, and the presence of different concentrations (1 to 100 μm) of CN− in the electrolyte can weaken the oxidative quenching to substantially different extents. Although PEFC is hydrophobic in the neutral state, it is converted to radical cation/dication states upon oxidation, rendering the PEFC some hydrophilicity. Moreover, its nanoporous morphology provides a large surface area and short diffusion distance, facilitating the movement of CN− in the electrolyte into the PEFC film to interact with receptors. Density functional theory calculations show that the noncovalent interaction between electron-deficient BTD and nucleophilic CN− is energy favorable in the oxidized states in both aqueous and organic media, suggesting that the specific π−–π+ interaction plays the main role in the CN− detection. |
| first_indexed | 2024-10-01T03:05:53Z |
| format | Journal Article |
| id | ntu-10356/105312 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:05:53Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1053122020-06-01T10:01:56Z Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism Ding, Guoqiang Lin, TingTing Zhou, Rui Dong, Yuliang Xu, Jianwei Lu, Xuehong School of Materials Science & Engineering DRNTU::Science::Chemistry An electrofluorochromic (EFC) conjugated copolymer (PEFC) containing carbazole and benzothiadiazole (BTD) moieties is synthesized through Suzuki coupling followed by electrochemical polymerization, resulting in a nanoporous EFC polymer electrode. The electrode exhibits high sensitivity and selectivity in the EFC detection of cyanide anions (CN−) in largely aqueous electrolyte (67 vol % water) because electrochemical oxidation of PEFC leads to significant fluorescence quenching, and the presence of different concentrations (1 to 100 μm) of CN− in the electrolyte can weaken the oxidative quenching to substantially different extents. Although PEFC is hydrophobic in the neutral state, it is converted to radical cation/dication states upon oxidation, rendering the PEFC some hydrophilicity. Moreover, its nanoporous morphology provides a large surface area and short diffusion distance, facilitating the movement of CN− in the electrolyte into the PEFC film to interact with receptors. Density functional theory calculations show that the noncovalent interaction between electron-deficient BTD and nucleophilic CN− is energy favorable in the oxidized states in both aqueous and organic media, suggesting that the specific π−–π+ interaction plays the main role in the CN− detection. 2014-09-15T03:18:37Z 2019-12-06T21:49:03Z 2014-09-15T03:18:37Z 2019-12-06T21:49:03Z 2014 2014 Journal Article Ding, G., Lin, T., Zhou, R., Dong, Y., Xu, J., & Lu, X. (2014). Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism. Chemistry - a European journal, in press. 0947-6539 https://hdl.handle.net/10356/105312 http://hdl.handle.net/10220/20685 10.1002/chem.201403133 en Chemistry - a European journal © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| spellingShingle | DRNTU::Science::Chemistry Ding, Guoqiang Lin, TingTing Zhou, Rui Dong, Yuliang Xu, Jianwei Lu, Xuehong Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism |
| title | Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism |
| title_full | Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism |
| title_fullStr | Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism |
| title_full_unstemmed | Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism |
| title_short | Electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism |
| title_sort | electrofluorochromic detection of cyanide anion using a nanoporous polymer electrode and the detection mechanism |
| topic | DRNTU::Science::Chemistry |
| url | https://hdl.handle.net/10356/105312 http://hdl.handle.net/10220/20685 |
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