title: Harnessing a pyrimidine based molecular switch to construct reversible test strips for F-/AcO-with respect to Al3+: A colorimetric approach.
abstract: We report novel compound 4-nitro-2-((pyrimidin-2-ylamino) methyl) phenol (1) synthesized by the condensation of 5-nitro salicylaldehyde with 2-amino pyridine. Compound 1 serves as a dual signalling chromogenic receptor for F-/AcO-and Al3+ions. The chromogenic response of 1 towards the aforementioned analytes is reversible with respect to either Al3+/X (=F/AcO)-or X(F/AcO)-/Al3+. The limit of detection of 1 for F-and AcO-are 1.0025×10-7M and 0.79×10-7M, respectively. The optical switching has been rationalized on the basis of UV-Vis titrations and1H NMR titrations respectively. The optical switching has been successfully use by constructing reversible paper strips for detecting Al3+as well as F-/AcO-.
authors.affiliation: Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
authors.forename: Arghyadeep
authors.initials: A
authors.lastname: Bhattacharyya
authors.affiliation: Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
authors.forename: Soumen
authors.initials: S
authors.lastname: Ghosh
authors.affiliation: Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
authors.forename: Subhash Chandra
authors.initials: SC
authors.lastname: Makhal
authors.affiliation: Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India. Electronic address: nguchhait@yahoo.com.
authors.forename: Nikhil
authors.initials: N
authors.lastname: Guchhait
keywords: Acetate; Aluminium; Fluoride; Naked eye sensing; Reversible; Sensor