Dendrimeric tweezers for recognition of fluorogenic Co2+, Mg2+ and chromogenic Fe2+

Dendrimers are the attractive candidature for the formation of metal complexes capable of performing varied application, owing to the presence of multiple terminal groups on the exterior of the molecule has received tremendous attention. Herein, we have synthesized novel dendritic macromolecule (N′E,N‴E,N″‴E,N‴‴′E)-3,3′,3″,3‴-(ethane-1,2-diylbis(azanetriyle))tetrakis(N′-(2-hydroxybenzyllidene)propanehydrazide) chemosensor L and its metal complexes. In the present study the application in the optical sensing for chromogenic Fe2+ and fluorogenic Co2+ and Mg2+cation is reported. The dendrimeric chemosensor L and its metal complexes are investigated with the help of FTIR spectroscopy, Nuclear magnetic resonance (1H NMR and 13C NMR), FT Raman Microspectroscopy, fluorescence and UV-visible spectroscopy. Thermal properties are studied using thermal gravimetric analysis.