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Kathuria I, Kaur P, Kumar S. A light-responsive, highly sensitive probe to perceive mercuric ions in both water and biological samples using fluorescence, colorimetric & electrochemical techniques. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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A substituted benzothiazolinic merocyanine derivative as a reversible, selective, colorimetric and fluorescent probe for HSO4− in aqueous solution. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kumar A, Sahoo PR, Prakash K, Arya Y, Kumar S. Light controlled dimerization of spiropyran as a tool to achieve dual responsive capture and release system in aqueous media. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115845] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Visually detecting cyanide ion in aqueous solution sensitively and selectively using a merocyanine salt with the help of a smartphone. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130757] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kumar A, Kumar R, Kumar S. Cyanide‐Ion‐Induced J‐Aggregation of Merocyanine Dye for Paper‐Based Colorimetric Detection in Water. ChemistrySelect 2021. [DOI: 10.1002/slct.202100147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Arvind Kumar
- Department of Chemistry, St. Stephen's College (University of Delhi) University Enclave Delhi 110007 India
| | - Rajesh Kumar
- Defence Laboratory Jodhpur Jodhpur 342011 Rajasthan India
| | - Satish Kumar
- Department of Chemistry, St. Stephen's College (University of Delhi) University Enclave Delhi 110007 India
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Kumar A, Sahoo PR, Arora P, Kumar S. A light controlled, sensitive, selective and portable spiropyran based receptor for mercury ions in aqueous solution. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.112061] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Colorimetric and Fluorescence-Based Detection of Mercuric Ion Using a Benzothiazolinic Spiropyran. CHEMOSENSORS 2019. [DOI: 10.3390/chemosensors7030035] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A merocyanine dye as a p-toluenesulfonate salt was synthesized. The structure of the dye was characterized using IR, NMR, HR-MS and single crystal X-ray crystallography. The X-ray crystallographic studies revealed the formation of a stacked aggregated structure of the merocyanine dye. The stacking interactions were investigated using the Crystal Explorer program, which estimated the strength of the interactions between different molecular pairs. The merocyanine dye was screened for affinity towards heavy metal ions, which revealed a color change from pink to colorless in the presence of mercuric ions, while other metal ions did not produce a similar change in color. In addition, the fluorescence spectroscopy indicated a change in the fluorescence intensity upon addition of mercuric ions. Both techniques displayed a good limit of detection value towards mercuric ions. In addition, the pixel intensity-based detection technique was also employed for the determination of limit of detection value with the help of a smartphone. The dynamic light scattering (DLS) studies indicated that the optical change occurred in the spectra of the receptor is due to the disaggregation of the receptor induced by mercuric ions. In addition, 1H-NMR studies were also used for investigating the mechanism of interaction between the receptor and the mercuric ions. The density functional theory (DFT) studies were used to investigate the formation of the complex at the molecular level, while time dependent density functional theory (TD-DFT) studies were used to understand the observed absorption spectra through the calculation of electronic excitation parameters, which indicated an increase in the energy difference between ground and the excited state.
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Kumar A, Prakash K, Sahoo PR, Kumar S. Visible Light Controlled Aggregation of a Spiropyran-HSO4
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Complex as a Strategy for Reversible Detection in Water. ChemistrySelect 2017. [DOI: 10.1002/slct.201701357] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ajeet Kumar
- Department of Chemistry; University Enclave, St. Stephen's College; Delhi-110007 India
| | - Kunal Prakash
- Department of Chemistry; University Enclave, St. Stephen's College; Delhi-110007 India
| | - Priya Ranjan Sahoo
- Department of Chemistry; University Enclave, St. Stephen's College; Delhi-110007 India
| | - Satish Kumar
- Department of Chemistry; University Enclave, St. Stephen's College; Delhi-110007 India
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