摘要:
A series of heteroleptic copper(II) complexes, [Cu((R)AIMP)(bpy)](ClO4) (1-7) and [Cu((4-OMe)QYMP)(B)] (ClO4) (B = bpy (8) or phen (9)), supported by NNO-tridentate Schiff base ligands (AIMP or QYMP) have been synthesized and characterized. X-ray crystal structural studies of complexes 1, 6 and 8, exhibit that these complexes are penta-coordinated mononuclear with a distorted square pyramidal geometry around the Cu center. Experimental results show that all of these complexes reveal good DNA cleavage activity in the presence of reducing agent 3-mercapto-propionic (MPA). However, in the photoinduced experiments at 365 nm, the activity was observed only at high concentration (200 mu M) of the Cu complexes. The 1, 10-phenanthroline coordinated complex, 9, shows the higher activity towards DNA photocleavage than its analogue complex 8 with the bipyridine base. (C) 2012 Elsevier Ltd. All rights reserved.