Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Faculty Publications Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource Varghese, Nikita; Thomas, Jisha Mary; John, Athira Maria; Baby Chakrapani, P.S.; Nair, Yamuna Title A name given to the resource ESIPT Active Schiff Base Fluorescent Sensor for Selective and Sensitive Detection of Co(II) Ions: Experimental, DFT Optimization Studies and Real Sample Analysis Date A point or period of time associated with an event in the lifecycle of the resource 01-01-2026 Source A related resource from which the described resource is derived Journal of Fluorescence;Volume;36;Issue;3;pp.1973-1985 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.1007/s10895-025-04679-z" target="_blank" rel="noreferrer noopener">https://doi.org/10.1007/s10895-025-04679-z</a> <br /><br /><a href="https://www.scopus.com/pages/publications/105026588655?origin=resultslist" target="_blank" rel="noreferrer noopener">https://www.scopus.com/pages/publications/105026588655?origin=resultslist</a> Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Varghese N., Department of Chemistry, Christ University, Bangalore, 560029, India; Thomas J.M., Department of Chemistry, Christ University, Bangalore, 560029, India; John A.M., Department of Chemistry, Christ University, Bangalore, 560029, India; Baby Chakrapani P.S., Department of Biotechnology, Cochin University of Science and Technology, Kochi, 682022, India; Nair Y., Department of Chemistry, Christ University, Bangalore, 560029, India Description An account of the resource A novel fluorescent Schiff base chemosensor, N1,N6-bis((E)-3,5-dibromo-2-hydroxybenzylidene)adipohydrazide (DBSA), has been developed for the detection of Cobalt (II) ions. DBSA exhibits distinct fluorescence enhancement upon interacting with Co(II) ions via photoinduced electron transfer (PET). The developed sensor demonstrates a remarkable sensitivity, with the detection limits of 9.9 nM for Co(II) ions, which aligns well with the Environmental Protection Agency (EPA) regulatory thresholds for drinking water contaminants. Structural characterization by LC-MS, FTIR coupled with Jobs plot and NMR titration studies confirm the formation of DBSA-Co complex with a binding constant of 4.61 106 M? 1. The chemo sensor exhibits a quantum yield of 0.082, highlighting its potential applicability in photochemical processes. Computation studies were used to further investigate the binding interactions with Co2+ ions. The practical utility of DBSA has been validated through successful analyses in varied aqueous matrices, including tap water, lake water and recycled water. Cytotoxicity assessment via MTT assays on SH-SY5Y cells confirms excellent biocompatibility of the probe. This work presents a significant advancement in the design of efficient molecular probes for environmental monitoring, offering a robust platform for the concurrent detection of transition-metal ions in aqueous systems. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2026. Subject The topic of the resource Co²⁺ ions; Cytotoxicity; ESIPT; Fluorescence; Real sample analysis Publisher An entity responsible for making the resource available Springer Relation A related resource ISSN: 10530509; CODEN: JOFLE Language A language of the resource English Type The nature or genre of the resource Article Rights Information about rights held in and over the resource Restricted Access; Hardcopy may be available in the library Format The file format, physical medium, or dimensions of the resource online