Bis (tridentate) divalent first-row transition metal ion (Zn, Mn, Fe, Ni, Co) complexes: Crystal structure, nonlinear optical property, and magnetic resonance imaging
Five divalent first-row transition metal coordination compounds based on 4′-ferrocenyl-2, 2′: 6′, 2′'-terpyridine, M(L)2(PF6)2 (M=Zn, Mn, Fe, Ni, Co), have been synthesized, the structures of which have been determined, analyzed, and compared through single-crystal X-ray crystallography. The third-order nonlinear optical properties of them have been measured with the Z-scan technique, and the results