ItemArticle

Bimodal sensor employing a novel approach for simultaneous selective detection of Ni2+ and biomolecules via turn-on fluorescence supported by DFT and molecular docking

Title
Bimodal sensor employing a novel approach for simultaneous selective detection of Ni2+ and biomolecules via turn-on fluorescence supported by DFT and molecular docking
Creator
Shinziya, Hazeena; Das, Avijit Kumar; Kumar, Malavika S; Nag, Anish; Dolai, Malay
Description
A bimodal sensor, (E)-2-(4-(diphenylamino)styryl)-1-methylquinolin-1-ium (DSM), was designed and synthesized for the simultaneous fluorescence turn-on detection of Ni2+ ion and biomolecules such as ct-DNA, BSA, and ovalbumin. Due to its distinct size and steric properties, DSM exhibits different binding modes when interacting with Ni2+ and DNA/proteins. The probe DSM possesses dual functionalities, allowing it to selectively detect Ni2+ at one binding site while interacting with ct-DNA, BSA, and ovalbumin at another. Thus, interactions of DSM with Ni2+ result in fluorescence enhancement at 377 nm and 400 nm, with a detection limit of 1.53 ?M and binding constant of 1.2 106 M?1. Moreover, the binding of DSM with Ni2+ has been demonstrated via UV-vis, mass spectra, Jobs plots and DFT analysis. Conversely, binding of DSM with ct-DNA, ovalbumin and BSA led to an increase in the fluorescence at 425 nm and 435 nm, respectively, with the detection limit at micromolar (ct-DNA) and nanomolar (BSA and ovalbumin) levels. These interactions have been validated through UV-vis spectroscopy, fluorescence studies, and molecular docking analysis. Thus, this study underscores the potential of DSM as a versatile tool for simultaneous detection of both metal ions and biomolecules with a unique bimodal approach. 2025 RSC.
Source
Sensors and Diagnostics;Volume;4;Issue;7;pp.622-630
Date
01-01-2025
Publisher
Royal Society of Chemistry
Coverage
Shinziya H., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India; Das A.K., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India; Kumar M.S., Department of Chemistry, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India; Nag A., Department of Life Science, Christ University, Hosur Road, Karnataka, Bangalore, 560029, India; Dolai M., Department of Chemistry, Prabhat Kumar College, Purba Medinipur, West Bengal, Contai, 721404, India
Rights
All Open Access; Gold Open Access
Relation
ISSN: 26350998;
Format
online
Language
English
Type
Article

Citation

Shinziya, Hazeena; Das, Avijit Kumar; Kumar, Malavika S; Nag, Anish; Dolai, Malay, “Bimodal sensor employing a novel approach for simultaneous selective detection of Ni2+ and biomolecules via turn-on fluorescence supported by DFT and molecular docking,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 20, 2026, https://archives.christuniversity.in/items/show/22593.

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