Aggregation-induced Emission Active Naphthalimide Derived Schiff Base for Detecting Cu 2+ and Its Applications.

Autor: Patel DA; Department of Chemistry, Sardar Vallabhbhai National Institute Technology, 395007, Surat, Gujarat, India., Anand T; Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai, 600119, India., Selvam P; Department of Chemistry, School of Advance Sciences, Vellore Institute of Technology, 632014, Vellore, Tamil Nadu, India., Sahoo SK; Department of Chemistry, Sardar Vallabhbhai National Institute Technology, 395007, Surat, Gujarat, India. sks@chem.svnit.ac.in.
Jazyk: angličtina
Zdroj: Journal of fluorescence [J Fluoresc] 2024 Jan; Vol. 34 (1), pp. 359-366. Date of Electronic Publication: 2023 Jun 02.
DOI: 10.1007/s10895-023-03287-z
Abstrakt: Herein, an aggregation-induced emission (AIE) active Schiff base (NHS) was synthesized by condensing naphthalimide hydrazide with salicylaldehyde. The non-fluorescent solution of NHS in DMSO turned to emissive NHS upon increasing the HEPES fraction in DMSO from 70 to 95%. The UV-Vis absorption and DLS studies supported the self-aggregation of NHS that restricted the intramolecular rotation and activated the ESIPT process. The blue fluorescence of AIE luminogen NHS in DMSO:HEPES (5:95, v/v, pH = 7.4) was examined by adding different metal ions (Al 3+ , Ca 2+ , Cd 2+ , Co 2+ , Cu 2+ , Cr 2+ , Fe 2+ , Fe 3+ , Hg 2+ , Mg 2+ , Mn 2+ , Ni 2+ , Pb 2+ and Zn 2+ ). NHS showed a selective fluorescence switch-off response for Cu 2+ due to the chelation enhancement quenching effect (CHEQ). The quenching of NHS by Cu 2+ was explored by using density functional theory (DFT) and Stern-Volmer plot. The practical utility of NHS was examined by quantitative and qualitative analysis of Cu 2+ in real water samples.
(© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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