A developed chromogenic probe for determination of dual analyte with logic gates function and keypad-lock

ABSTRACT

In the current study, a novel and facile selective colorimetric approach was developed by Eriochrome Black T (EBT) for naked-eye detection and determination of nickel (Ni²⁺) and cyanide (CN⁻) ions in H₂O/DMSO (9:1, v/v) media. The chemosensing behaviour of EBT has been indicated through UV-Vis absorbance spectra, visual colour changes, and FTIR spectra. First, EBT could selectively identify Ni²⁺ over other competitive cation in 90% aqueous media and then, the resulting EBT-Ni²⁺complex was successfully applied for selective colorimetric recognition of CN⁻ based on azo-hydrazone tautomeric skeletons. The detection limit of EBT towards Ni²⁺ and CN⁻ were calculated to be 0.06 µmol L⁻¹ and 0.15 µmol L⁻¹, respectively. These consequences represent an innovative type of nimble chemosensor for manifold target ions using simple colorimetric and sequential detection. When operated by chemical ions Ni²⁺ and CN⁻ can act as an absorbance switch, distinguishing a multi-addressable system. In addition, INVERTER (INV) and INHIBIT (INH) logic gates at different wavelengths and a keypad lock were created by applying chemical ions Ni²⁺ and CN⁻ as two inputs and an absorption mode at 541 nm as an output on the basis of suitable chemical stimuli.

KEYWORDS:

• Naked-eye detection
• Eriochrome Black T
• nickel
• cyanide
• molecular keypad lock

Acknowledgments

The authors wish to acknowledge the support of this work by Shiraz Payame Noor University Research council.

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplementary Materials

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