A dual channel rhodamine appended smart probe for selective recognition of Cu 2+ and Hg 2+ via "turn on" optical readout.

Autor: Sada PK; University Department of Chemistry, L.N. Mithila University Darbhanga, 846008, Bihar, India., Bar A; School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi, 221005, India., Jassal AK; Chemistry Department, Indian Institute of Technology Delhi, New Delhi, India., Singh AK; Department of Chemistry, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, 273009, Uttar Pradesh, India. Electronic address: aloksinghchemistry@gmail.com., Singh L; Department of Chemistry, Siddharth University, Kapilvastu, Siddharth Nagar, 272202, Uttar Pradesh, India. Electronic address: laxmanresearcher84@gmail.com., Rai A; University Department of Chemistry, L.N. Mithila University Darbhanga, 846008, Bihar, India. Electronic address: abhishekraiinorg@gmail.com.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2023 Jul 04; Vol. 1263, pp. 341299. Date of Electronic Publication: 2023 Apr 29.
DOI: 10.1016/j.aca.2023.341299
Abstrakt: A new rhodamine-6G hydrazone RHMA has been synthesized using rhodamine-6G hydrazide and 5-Allyl-3-methoxysalicylaldehyde. RHMA has been fully characterized with different spectroscopic methods and single crystal XRD. RHMA can selectively recognize Cu 2+ and Hg 2+ in aqueous media amongst other common competitive metal ions. A significant change in absorbance was observed with Cu 2+ and Hg 2+ ions with emergence of a new peak at λ max 524 nm and 531 nm respectively. Hg 2+ ions lead to "turn-on" fluorescence enhancement at λ max 555 nm. This event of absorbance and fluorescence marks the opening of spirolactum ring causing visual color change from colorless to magenta and light pink.RHMA-Cu 2+ and RHMA- Hg 2+ complexes are found to be reversible in presence of EDTA 2- ions. RHMA has real application in form of test strip. Additionally, the probe exhibits turn-on readout-based sequential logic gate-based monitoring of Cu 2+ and Hg 2+ at ppm levels, which may be able to address real-world challenges through simple synthesis, quick recovery, response in water, "by-eye" detection, reversible response, great selectivity, and a variety of output for accurate investigation.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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