Arghyadeep Bhattacharyya, Soumen Ghosh, Subhash Chandra Makhal
May 15, 2017
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Journal
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
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 and 1H NMR titrations respectively. The optical switching has been successfully use by constructing reversible paper strips for detecting Al3+ as well as F-/AcO-.