P2AR.2 - A Smart Chemosensor: Discriminated Multidetection and Execution of Various logic Gates in Aqueous Solution at Biological pH

17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria
P-2 - Sensor Arrays
A. Said - Assiut University, Assiut (Egypt), N. Georgie, V. Bojinov - University of Chemical Technology and Metallurgy, Sofia (Bulgaria)
904 - 904


A novel rhodamine and pyrazole based probe was designed and easily synthesized. The probe could to detect several analyts in aqueous solution at biological pH (HEPES, 7.2). the probe could to detect discrimintly Several catoions, including Cu2+, Fe3+, Al3, Hg2+ and Ni2+. The detection could be selective towards Cu2+ by using high concentration of HEPES (10-3 mole L-1) in aquous solution and could be selective towards Hg2+ (by absorption spectrum) by working in pure organic medium (acetonitrile). By low concentration of HEPES buffer and one equivalent of cation, Fe3+ was discrimined by the enhancement of both the absorption at 530 nm and emission at 560 nm, but Al3+ enhanced only the emission at 560 nm remarkably (high quantum yield). Ni2+ could to be discriminated by increaing both absorption and emission after using ten equivalents of Ni2+ and low concentration of HEPES (10-5 mole L-1). Also, the probe exhibited a good selectivity towards S2O5 2- by both absorption and emission spectra. Moreover, probe-Cu2+ complex could to detect several anions, including F-, CN-. S2-, CH3COO-, CO3 2-, NO2 -. A further exploition of the prepared probe, is its ablility to work as a molecular logic gate to perform many gates including AND, NAND, NOR and INHIBIT logic gates.