查看文章

Synthesis of a highly fluorescent binuclear ZnII-metallacycle (1) based on novel Schiff base (H2L) viz. 2,7-dimethylacridine-3,6-diyl-bis(azaneylylidene)-bis(methaneylylidene)-bis(3-diethylaminophenol) is described and characterized through various spectral (FT-IR, 1H-NMR and HRMS) methods followed by structural authentication of 1 by single crystal X-ray diffraction analysis. The ZnII-metallacycle 1 is strategically incorporated with four -N(C2H5)2 groups which enables it to exhibit excellent selectivity towards picric acid (PA) among other nitro aromatic compounds (NACs) in form of fluorescence quenching (71%). The vital role of -N(C2H5)2 is substantiated by performing UV-vis, fluorescence, 1H-NMR spectral and DFT studies on 1 with all NACs and comparing it with a model complex 2 which lacks -N(C2H5)2 group. Studies revealed that the quenching involved a static and dynamic mechanism with quenching …