摘要

A novel macrocyclic zirconocene(IV) aromatic selenite [(CpZr)(8)L-16]center dot 2(Cp4Zr2(mu-O)Cl-2) (complex 1) (Cp = cyclopentadienyl anion; L = 4-fluorobenzeneseleninic acid) was prepared by the reaction of bis(cyclopentadienyl) zirconium dichloride with 4-fluorobenzeneseleninic acid and characterized by elemental analysis, infrared spectroscopy, H-1, C-13 NMR spectroscopy, ESI-MS, XRD and X-ray diffraction. The structure analysis shows that complex 1 is a centrosymmetric 32-membered macrocycle containing an eight-nuclear zirconocene. In this complex, the 4-fluorobenzeneseleninic acid ligands adopt bidentate mode in coordinating to zirconium, which play a bridging role in the formation of a macrocycle. The title compound is a rare example of aromatic selenic acid-based zirconocene derivatives. Furthermore, the preliminary in vitro anti-tumor activity of complex 1 has also been studied toward breast cancer cell lines (MDA-MB-231) and human cervix cell lines (HeLa). The results indicate that complex 1 shows higher activity compared with the ligand and bis(cyclopentadienyl) zirconium dichloride.