A symmetrical imine-linkage colorimetric probe for sequential detection of Al3+ and PO43- ions

• Published in: Inorganica Chimica Acta Vol. 564; p. 121966
• Main Authors: Maiti, Arpita, Tohora, Najmin, Roy, Debadrita, Ray, Tanusree, Rahaman, Habibur, Dakua, Vikas Kumar, Roy, Kanak, Roy, Mahendra Nath
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2024
• Subjects: Al3; Azine-based; ICT; PO43; Smartphone-based analysis; Al3; Azine-based; ICT; PO43; Smartphone-based analysis
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2024.121966

A symmetrical imine-linkage simple chromogenic probe, DPAB, has been introduced for cascade detection of Al3+ and PO43- ions with a nanomolar range detection limit. [Display omitted] •A symmetrical imine-linkage simple chromogenic probe, DPAB, has been introduced for cascade detection of Al3+ and PO43- ions.•The detection limit of DPAB towards Al3+ and PO43- ions has been estimated in the nanomolar range.•A paper strips-based portable test kit experiment has been demonstrated for on-spot detection and quantification of Al3+ and PO43- ions.•Molecular logic gates and memory devices have been framed based on the chemical inputs and optical output. Affordable and incredibly sensitive sustainable sensors for recognizing Al3+ ions have enormous practical applications. A simple and reliable sensor DPAB has been introduced is extremely susceptible regarding Al3+ ions and exhibits an incredible color change in DMSO and DMSO-H2O (9:1 v/v) solution, allowing us to visually distinguish Al3+ ions from other metals and anions. The limit of detection (LOD) values for Al3+ and PO43- ions are determined to be in the nM range considerably lower than other chemosensors described in the literature. Additionally, for on-the-spot detection, the probe may also be utilized in the test strips with a superior selectivity for Al3+and PO43-. Moreover, we also performed the smartphone-based technique for the practical utility of DPAB in the DMSO-H2O (9:1 v/v) solution. Sequentially including Al3+ and PO43- in the DPAB solution, the sensor's spectral responses and apparent color shift can be switched backward and forward. This can be conceptualized as a complementary “ INHIBIT” logic gate at the molecular phase. We have developed a molecular-scale subsequent memory device based on a reversible and repeatable detection system that exhibits “Writing-Reading-Erasing-Reading” and “Multi-write” functionalities as binary logic. The effectiveness of DPAB and DPAB-Al3+ complex suggests that DPAB may be used as a sensitive probe and be applied to the analysis of real samples.