Salicylaldehyde built fluorescent probe for dual sensing of Al3+, Zn2+ ions: Applications in latent fingerprint, bio-imaging & real sample analysis

T Johny Dathees; G Narmatha; G Prabakaran; Sonai Seenithurai; Jeng-Da Chai; Raju Suresh Kumar; J Prabhu; R Nandhakumar

doi:10.1016/j.foodchem.2024.138362

Salicylaldehyde built fluorescent probe for dual sensing of Al³⁺, Zn²⁺ ions: Applications in latent fingerprint, bio-imaging & real sample analysis

Food Chem. 2024 May 30:441:138362. doi: 10.1016/j.foodchem.2024.138362. Epub 2024 Jan 9.

Authors

T Johny Dathees¹, G Narmatha², G Prabakaran², Sonai Seenithurai³, Jeng-Da Chai⁴, Raju Suresh Kumar⁵, J Prabhu², R Nandhakumar⁶

Affiliations

¹ Fluorensic Materials Lab, Division of Physical Science, Karunya Institute of Technology and Sciences, (Deemed-to-be University), Karunya Nagar, Coimbatore 641 114, India; PG and Research Center of Chemistry, Jayaraj Annapackiam College for Women (Autonomous), Periyakulam, 625 601 Theni, India.
² Fluorensic Materials Lab, Division of Physical Science, Karunya Institute of Technology and Sciences, (Deemed-to-be University), Karunya Nagar, Coimbatore 641 114, India.
³ Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
⁴ Department of Physics, National Taiwan University, Taipei 10617, Taiwan; Center for Theoretical Physics and Center for Quantum Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
⁵ Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
⁶ Fluorensic Materials Lab, Division of Physical Science, Karunya Institute of Technology and Sciences, (Deemed-to-be University), Karunya Nagar, Coimbatore 641 114, India. Electronic address: [email protected].

PMID: 38219362
DOI: 10.1016/j.foodchem.2024.138362

Abstract

This Schiff base chemosensor (SNN) detected dual ions, Al³⁺ and Zn²⁺ ions selectively. Fluorescence spectrum investigations showed that Al³⁺ ions increased fluorescence intensity, notably at 493 nm. Introducing Zn²⁺ ions caused a significant blue shift of roughly ∼65 nm at a wavelength of 434 nm, resulting in a notable change in fluorescence intensity. When binding Al³⁺/Zn²⁺ ions, the SNN receptor uses three methods. Inhibition of photoinduced electron transfer (PET), excited state intramolecular proton transfer (ESIPT), and restriction of CN isomerization. The jobs plot method found that SNN + Al³⁺ and SNN + Zn²⁺ complexations had a 1:1 stoichiometry. DFT, LC-HRMS, and ¹H NMR titration confirm this conclusion. The probe SNN's limit of detection (LOD) for Al³⁺/Zn²⁺ ions was 3.99 nM and 1.33 nM. Latent fingerprint (LFP), food samples, pharmaceutical products, and E. coli pathogen bio-imaging have all used the SNN probe to identify Al³⁺ and Zn²⁺ ions.

Keywords: Al(3+)/Zn(2+); Bio-imaging; Food/pharmaceutical samples; Latent fingerprint; PET/ESIPT.

MeSH terms

Aldehydes*
Escherichia coli*
Fluorescent Dyes* / chemistry
Ions
Protons
Spectrometry, Fluorescence / methods
Zinc / analysis

Substances

Fluorescent Dyes
salicylaldehyde
Ions
Protons
Zinc
Aldehydes