ICT based molecular recognition of 2,5-dinitrophenol in methanol

The first report of wavelength ratiometric sensing of electron deficient nitroaromatic explosive, 2,5-dinitrophenol (N4) with photoluminescent electron rich Schiff base H2salen (A1) derived from 1,2-ethanediamine and salicyldehyde and related complexes [Zn(salen)]·H2O (A2) and [Ni(salen)]·H2O (A3) in methanol is presented. DFT based optimization reveals that NACs (N1-N5) induce the formation of 1:2 donor-acceptor complexes with the salen based compounds.