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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12246
Title: Ratiometric and colorimetric "naked eye" selective detection of CN- ions by electron deficient Ni(II) porphyrins and their reversibility studies
Authors: Kumar R.
Chaudhri N.
Sankar M.
Published in: Dalton Transactions
Abstract: Highly electron deficient β-substituted Ni(II) porphyrins (1-5) were synthesized and utilized as novel sensors for selective rapid visual detection of CN- ions. This article describes the single crystal X-ray structures, electronic spectral and electrochemical redox properties of these sensors. The ratiometric and colorimetric responses of these porphyrins were monitored by the change in optical absorption spectra. These sensors were found to be highly selective for cyanide ions with extremely high binding constants (1016-108 M-2) through axial ligation of CN- ions and are able to detect <0.11 ppm of CN- ions. 1-5 were recovered from 1-5·2CN- adducts by acid treatment and reused without loss of sensing ability. CN- binding strongly perturbs the redox properties of the parent porphyrin Ï€-system. The applicability of 1-5 as practical visible colorimetric test kits for CN- ions in aqueous and non-aqueous media has also been explored. The mode of binding was confirmed by single crystal X-ray, spectroscopic studies and DFT calculations. © The Royal Society of Chemistry 2015.
Citation: Dalton Transactions (2015), 44(19): 9149-9157
URI: https://doi.org/10.1039/c5dt00937e
http://repository.iitr.ac.in/handle/123456789/12246
Issue Date: 2015
Publisher: Royal Society of Chemistry
ISSN: 14779226
Author Scopus IDs: 55389796000
56450499000
6701530390
Author Affiliations: Kumar, R., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 2476667, India
Chaudhri, N., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 2476667, India
Sankar, M., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 2476667, India
Corresponding Author: Sankar, M.; Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email: sankafcy@iitr.ac.in
Appears in Collections:Journal Publications [ME]

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