Reversible Single-Crystal to Single-Crystal Transformations of a Zn(II)鈥揝alicyaldimine Coordination Polymer Accompanying Changes in Coordination Sphere and Network Dimensionality upon Dehydration and

详细信息    查看全文

• 作者：Jing-Yun Wu ; Ching-Yun Chang ; Chi-Jou Tsai ; Jey-Jau Lee
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：November 16, 2015
• 年：2015
• 卷：54
• 期：22
• 页码：10918-10924
• 全文大小：451K
• ISSN：1520-510X

文摘

A fluorescent Zn(II)鈥搒alicyaldimine coordination polymer, [Zn(L^salpyca)(H₂O)]_n (1; H₂L^salpyca = 4-hydroxy-3-(((pyridin-2-yl)methylimino)methyl)benzoic acid), showing a one-dimensional (1D) zigzag chain structure has been hydro(solvo)thermally synthesized. Removal of coordination water molecules in 1 by thermal dehydration gives rise to the dehydration product [Zn(L^salpyca)]_n (1鈥?, which has a dizinc-based two-dimensional (2D) gridlike (4,4)-layer structure. X-ray powder diffraction (XRPD) patterns, thermogravimetric (TG) analyses, and infrared (IR) spectra all clearly indicate that the structure of 1 is quite flexible as a result of a reversible 1D鈥?D single-crystal to single-crystal (SCSC) transformation upon removal and rebinding of coordination water molecules, which accompanies changes in coordination sphere and network dimensionality. Additionally, Zn(II)鈥搒alicyaldimine polymers 1 and 1鈥?exhibit different solid-state photoluminescences at 458 and 480 nm, respectively. This is reasonably attributed to the close-packing effect and/or the influences of the differences on the conformation and the coordination mode of the L^salpyca ligand and the coordination geometry around the Zn(II) center.