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 showed that all the complexes have an excellent nonlinear optical response. Furthermore, the inversion recovery method indicated that these complexes could possess the targeting ability to Hela cells and made the contrast effect enhanced.

中文翻译：

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双（三齿）二价第一行过渡金属离子（Zn，Mn，Fe，Ni，Co）配合物：晶体结构，非线性光学性质和磁共振成像

基于4'-二茂铁基-2，2'：6'，2''-三联吡啶，M（L）₂（PF ₆）₂（M = Zn，Mn，Fe，Ni ）的五种二价第一行过渡金属配位化合物，Co）已合成，其结构已通过单晶X射线晶体学确定，分析和比较。用Z扫描技术测量了它们的三阶非线性光学性质，结果表明所有配合物均具有优异的非线性光学响应。此外，反向恢复法表明这些复合物具有对Hela细胞的靶向能力，增强了对比效果。