New Class of Scorpionate: Tris(tetrazolyl)鈥揑ron Complex and Its Different Coordination Modes for Alkali Metal Ions
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- 作者：Ka Hyun Park ; Kang Mun Lee ; Min Jeong Go ; Sung Ho Choi ; Hyoung-Ryun Park ; Youngjo Kim ; Junseong Lee
- 刊名：Inorganic Chemistry
- 出版年：2014
- 出版时间：August 18, 2014
- 年：2014
- 卷：53
- 期：16
- 页码：8213-8220
- 全文大小：492K
- ISSN：1520-510X
文摘
We report formation of a new metallascorpionate ligand, [FeL3]3鈥?/sup> (IPtz), containing a Fe core and three 5-(2-hydroxyphenyl)-1H-tetrazole (LH2) ligands. It features two different binding sites, oxygen and nitrogen triangles, which consist of three oxygen or nitrogen donors from tetrazole. The binding affinities of the complex for three alkali metal ions were studied using UV spectrophotometry titrations. All three alkali metal ions show high affinities and binding constants (>3 脳 106 M鈥?), based on the 1:1 binding isotherms to IPtz. The coordination modes of the alkali metals and IPtz in the solid were studied using X-ray crystallography; two different electron-donor sites show different coordination numbers for Li+, Na+, and K+ ions. The oxygen triangles have the 魏2 coordination mode with Li+ and 魏3 coordination mode with Na+ and K+ ions, whereas the nitrogen triangles show 魏3 coordination with K+ only. The different binding affinities of IPtz in the solid were manipulated using multiple metal precursors. A Fe鈥揔鈥揨n trimetallic complex was constructed by assembly of an IPtz ligand, K, and Zn precursors and characterized using X-ray crystallography. Oxygen donors are coordinated with the K ion via the 魏3 coordination mode, and nitrogen donors are coordinated with Zn metal by 魏3 coordination. The solid-state structure was confirmed to be a honeycomb coordination polymer with a one-dimensional infinite metallic array, i.e., 鈭?K鈥揔鈥揊e鈥揨n鈥揊e鈥揔)n鈥?