A chemosensor showing discriminating fluorescent response for highly selective and nanomolar detection of Cu2+ and Zn2+ and its application in molecular logic gate

• Published in: Analytica chimica acta Vol. 872; pp. 63 - 69
• Main Authors: Fegade, Umesh A., Sahoo, Suban K., Singh, Amanpreet, Singh, Narinder, Attarde, Sanjay B., Kuwar, Anil S.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 04.05.2015
• Subjects: Cation sensing; Copper - analysis; Cu2; Ethylamines - chemical synthesis; Ethylamines - chemistry; Fluorescence; Fluorescent Dyes - chemical synthesis; Fluorescent Dyes - chemistry; Logic; Molecular logic gate; Molecular Structure; Nanomolar detection; Pyrazoles - chemical synthesis; Pyrazoles - chemistry; Quantum Theory; Spectrometry, Fluorescence; Spectrophotometry, Ultraviolet; Zinc - analysis; Zn2; Cation sensing; Cu2; Nanomolar detection; Molecular logic gate; Zn2; Zn(2+); Cu(2+)
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2015.02.051

[Display omitted] •Receptor 3 was developed by condensation reaction.•Highly selective and sensitive detection of Cu2+ and Zn2+ in semi-aqueous system.•The detection limit of 5nM and 15nM for Cu2+ and Zn2+ ions, respectively.•Receptor 3 application in INHIBIT type logic gate. A fluorescent based receptor (4Z)-4-(4-diethylamino)-2-hydroxybenzylidene amino)-1,2dihydro-1,5-dimethyl-2-phenylpyrazol-3-one (receptor 3) was developed for the highly selective and sensitive detection of Cu2+ and Zn2+ in semi-aqueous system. The fluorescence of receptor 3 was enhanced and quenched, respectively, with the addition of Zn2+ and Cu2+ ions over other surveyed cations. The receptor formed host-guest complexes in 1:1 stoichiometry with the detection limit of 5nM and 15nM for Cu2+ and Zn2+ ions, respectively. Further, we have effectively utilized the two metal ions (Cu2+ and Zn2+) as chemical inputs for the manufacture of INHIBIT type logic gate at molecular level using the fluorescence responses of receptor 3 at 450nm.