Metal-ion exchange induced structural transformation as a way of forming novel Ni(II)− and Cu(II)−salicylaldimine structures
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- 作者：Jing-Yun Wu ; jyunwu@ncnu.edu.tw ; Chi-Jou Tsai ; Ching-Yun Chang ; Yung-Yuan Wu
- 关键词：Copper ; Metal-ion exchange ; Nickel ; Structural transformation ; Zigzag chain
- 刊名：Journal of Solid State Chemistry
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：246
- 期：Complete
- 页码：23-28
- 全文大小：780 K
- 卷排序：246
文摘
A Zn(II)−salicylaldimine complex [Zn(Lsalpyca)(H2O)]n (1, where H2Lsalpyca=4-hydroxy-3-(((pyridin-2-yl)methylimino)methyl)benzoic acid), with a one-dimensional (1D) chain structure, has been successfully converted to a discrete Ni(II)−salicylaldimine complex [Ni(Lsalpyca)(H2O)3] (2) and an infinite Cu(II)−salicylaldimine complex {[Cu(Lsalpyca)]·3H2O}n (3) through a metal-ion exchange induced structural transformation process. However, such processes do not worked by Mn(II) and Co(II) ions. Solid-state structure analyses reveal that complexes 1–3 form comparable coordinative or supramolecular zigzag chains running along the crystallographic [201] direction. In addition, replacing Zn(II) ion by Ni(II) and Cu(II) ions caused changes in coordination environment and sphere of metal centers, from a 5-coordinate intermediate geometry of square pyramidal and trigonal bipyramidal in 1 to a 6-coordinate octahedral geometry in 2, and to a 4-coordiante square planar geometry in 3. This study shows that metal-ion exchange serves as a very efficient way of forming new coordination complexes that may not be obtained through direct synthesis.