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DC Field | Value | Language |
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dc.contributor.author | Joshi, Mayank | - |
dc.contributor.author | Choudhury, Angshuman Roy | - |
dc.date.accessioned | 2023-08-23T06:03:30Z | - |
dc.date.available | 2023-08-23T06:03:30Z | - |
dc.date.issued | 2021 | - |
dc.identifier.uri | https://doi.org/10.1016/j.molliq.2021.115293 | - |
dc.identifier.uri | http://hdl.handle.net/123456789/5075 | - |
dc.description | Only IISERM authors are available in the record. | en_US |
dc.description.abstract | Two hydrazine functionalized Schiff bases have been synthesized through the reaction between hydrazine and o-vanillin/salicylaldehyde compounds employing a green-chemical approach and characterized spectroscopically including XRD study. Crystal structure analysis reveals that both the chemosensors, N,N′-bis(o-vanilidine)hydrazine (P17) and N,N′-bis(salicylidene)hydrazine, (HARB) crystallize in monoclinic system with P21/n space group and exist in the locked forms through intramolecular H-bonding (~1.90 Å) between phenolic-OH and N atom of hydrazine. The chemosensors display excellent selectivity towards fluoride followed by bisulphate ions, over other potential competitor anions in acetonitrile. Binding stoichiometry of the individual chemosensor with F− is confirmed to be 1:1 and assessed with absorption study and 1H NMR analysis. Systematic DFT analysis reveals that the contribution of hydroxyl oxygen atoms to the HOMO increases sharply from the chemosensor to chemosensor–F− adduct (17% to 28%) leading to deprotonation of one hydroxyl group and consequently involvement in conjugation impeding the C=N isomerisation. Thus, the hydroxyl proton captured by F− restricts the C=N isomerisation as well as ICT character of both the chemosensors and confirms the cascade sensing mechanism for fluoride and bisulphate ions. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Elsevier | en_US |
dc.subject | Fluoride and bisulphate sensing | en_US |
dc.subject | Green-chemical synthesis | en_US |
dc.subject | Naked eye colour change | en_US |
dc.subject | Schiff base | en_US |
dc.subject | Spectrophotometry | en_US |
dc.subject | TD-DFT study | en_US |
dc.subject | X-ray structure | en_US |
dc.title | Cascade detection of fluoride and bisulphate ions by newly developed hydrazine functionalised Schiff bases | en_US |
dc.type | Article | en_US |
Appears in Collections: | Research Articles |
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