Abstract
2-Hydroxy salicylhydrazide isatin hydrazone (L) and its Mn (II), Co (II), Ni (II), Cu (II), and Zn (II), metal complexes were synthesized. 1H NMR, UV–Vis, IR spectroscopy and elemental (CHN/S) analysis techniques were applied for characterization. TG/DTA techniques revealed that all the synthetic compounds are thermally stable up to 300°C. They were found non-electrolytes in nature. Furthermore, all these complexes were evaluated for antiglycation and DPPH radical scavenging activities. They showed varying degree of activity with IC50 values between 168.23 and 269.0μM in antiglycation and 29.63–57.71μM in DPPH radical scavenging activity. Mn (II), Co (II), Ni (II), Cu (II), and Zn (II), metal complexes showed good antiglycation as well as DPPH radical scavenging activity. The IC50 values for antiglycation activity are 168.23±2.37, 234.27±4.33, 257.1±6.43, 267.7±8.43, 269.0±8.56 Ni for Co, Zn, Mn, Cu, and Ni complexes, respectively, while IC50 value were found to be 29.63±2.76, 31.13±1.41, 35.16±2.45, 43.53±3.12, 57.71±2.61μM for Cu, Zn, Mn, Co and Ni complexes, respectively, for DPPH radical scavenging activity. These synthesized metal complexes were found to be better active than standards Rutin (IC50=294.46μM) for anti-glycation, and tert-butyl-4-hydroxyanisole (IC50=44.7μM) for DPPH radical scavenging activity.