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Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore
Herein, the turn-off fluorescence sensor of 2-((4′-(7,8,13,14-tetrahydrodibenzo[a,i]phenanthridin-5-yl)-[1,1′-biphenyl]-4-yl)methylene)malanonitrile (7) was developed for the recognition of CN(−) ions and studied using different spectroscopic techniques. The selective recognition of CN(−) ions by 7...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9050552/ https://www.ncbi.nlm.nih.gov/pubmed/35496610 http://dx.doi.org/10.1039/d0ra00623h |
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author | Manickam, Saravanakumar Iyer, Sathiyanarayanan Kulathu |
author_facet | Manickam, Saravanakumar Iyer, Sathiyanarayanan Kulathu |
author_sort | Manickam, Saravanakumar |
collection | PubMed |
description | Herein, the turn-off fluorescence sensor of 2-((4′-(7,8,13,14-tetrahydrodibenzo[a,i]phenanthridin-5-yl)-[1,1′-biphenyl]-4-yl)methylene)malanonitrile (7) was developed for the recognition of CN(−) ions and studied using different spectroscopic techniques. The selective recognition of CN(−) ions by 7 was investigated via UV-vis spectroscopy and fluorescence studies in acetonitrile solvent, which exhibited an obvious color change from orange to colorless under 365 UV light. The sensor compound 7 possesses a high binding constant (K(a)) for CN(−) ions in the order of 5.22 × 10(6) M(−1). The results from the interference studies revealed that probe 7 shows high sensing selectivity and sensitivity for CN(−) ions over other competitive anions. Probe 7 interacts with cyanide to form a 1 : 1 adduct, and this mechanism was further verified by (1)H NMR titration, Job's plot analyses and DFT studies. The sensor probe 7 exhibits advantages such as low limit of detection (LOD) of 39.3 nM, fast response and sensing in a wide pH range of 3 to 11. The practical application of 7 was successfully demonstrated for the determination of CN(−) ions in test paper strips and various water samples. |
format | Online Article Text |
id | pubmed-9050552 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90505522022-04-29 Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore Manickam, Saravanakumar Iyer, Sathiyanarayanan Kulathu RSC Adv Chemistry Herein, the turn-off fluorescence sensor of 2-((4′-(7,8,13,14-tetrahydrodibenzo[a,i]phenanthridin-5-yl)-[1,1′-biphenyl]-4-yl)methylene)malanonitrile (7) was developed for the recognition of CN(−) ions and studied using different spectroscopic techniques. The selective recognition of CN(−) ions by 7 was investigated via UV-vis spectroscopy and fluorescence studies in acetonitrile solvent, which exhibited an obvious color change from orange to colorless under 365 UV light. The sensor compound 7 possesses a high binding constant (K(a)) for CN(−) ions in the order of 5.22 × 10(6) M(−1). The results from the interference studies revealed that probe 7 shows high sensing selectivity and sensitivity for CN(−) ions over other competitive anions. Probe 7 interacts with cyanide to form a 1 : 1 adduct, and this mechanism was further verified by (1)H NMR titration, Job's plot analyses and DFT studies. The sensor probe 7 exhibits advantages such as low limit of detection (LOD) of 39.3 nM, fast response and sensing in a wide pH range of 3 to 11. The practical application of 7 was successfully demonstrated for the determination of CN(−) ions in test paper strips and various water samples. The Royal Society of Chemistry 2020-03-23 /pmc/articles/PMC9050552/ /pubmed/35496610 http://dx.doi.org/10.1039/d0ra00623h Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Manickam, Saravanakumar Iyer, Sathiyanarayanan Kulathu Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore |
title | Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore |
title_full | Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore |
title_fullStr | Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore |
title_full_unstemmed | Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore |
title_short | Highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore |
title_sort | highly sensitive turn-off fluorescent detection of cyanide in aqueous medium using dicyanovinyl-substituted phenanthridine fluorophore |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9050552/ https://www.ncbi.nlm.nih.gov/pubmed/35496610 http://dx.doi.org/10.1039/d0ra00623h |
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