A series of flexible bis(imidazole)-based coordination polymers tuned by central metal ions and dicarboxylates: Diverse structures and properties

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• 作者：Xiu-Li Wang ; Yun Qu ; Guo-Cheng Liu ; Jian Luan ; Hong-Yan Lin ; Xiao-Min Kan
• 关键词：Bis(imidazole)-based ligand ; N/S-containing dicarboxylate ; Coordination polymer ; Crystal structure ; Fluorescent property ; Photocatalytic property
• 刊名：Inorganica Chimica Acta
• 出版年：1 March, 2014
• 年：2014
• 卷：412
• 期：Complete
• 页码：104-113
• 全文大小：3547 K

文摘

Seven new coordination polymers, namely, [Ni(L)_1.5(2-CMSN)(H₂O)]路2H₂O rong class="boldFont">1rong>, [Co₂(L)₂(2-CMSN)₂(H₂O)]路H₂O rong class="boldFont">2rong>, [Cd(L)(2-CMSN)(H₂O)] rong class="boldFont">3rong> [Zn(L)(2-CMSN)]路2H₂O rong class="boldFont">4rong>, [Cd(ADTZ)(H₂O)] rong class="boldFont">5rong>, [Cd(L)(ADTZ)(H₂O)] rong class="boldFont">6rong>, and [Zn(L)(ADTZ)]路H₂O rong class="boldFont">7rong> [where 2-H₂CMSN = 2-carboxymethylsulfanyl nicotinic acid, H₂ADTZ = 2,5-(s-acetic acid) dimercapto-1,3,4-thiadiazole, L = 1,4-bis(imidazol-1-ylmethyl)benzene] have been synthesized under hydrothermal conditions. The complexes were structurally characterized by single crystal X-ray diffraction analyses, infrared spectroscopy (IR), elemental analyses, powder X-ray diffraction (PXRD) and thermogravimetric analyses (TGA). Complex rong class="boldFont">1rong> features a 1D ladder-like double chain. Complexes rong class="boldFont">2rong> and rong class="boldFont">3rong> exhibit the similar 2D networks based on six-nuclear metallic rings. Complex rong class="boldFont">4rong> is a 2D sheet. Complex rong class="boldFont">5rong> exhibits a 3D (4,6)-connected (4³路5³)(4⁵路5³路6⁷) topology. Complex rong class="boldFont">6rong> shows a 2D undulated network with the Schl盲fli symbol of (3路5²)(3²路5³路6⁴路7). Complex rong class="boldFont">7rong> is a 3D 4-fold interpenetrated rong class="boldFont">diarong> network. Structural comparison of these polymers suggests that different central metals and dicarboxylates play important roles in the construction of rong class="boldFont">1rong>-rong class="boldFont">7rong>. The luminescent properties of complexes rong class="boldFont">3rong>, rong class="boldFont">4rong>, rong class="boldFont">6rong>, rong class="boldFont">7rong> and the electrochemical properties of complexes rong class="boldFont">1rong>, rong class="boldFont">2rong> have been investigated. Furthermore, the complexes rong class="boldFont">2rong>-rong class="boldFont">4rong>, rong class="boldFont">6rong> and rong class="boldFont">7rong> exhibit photocatalytic activities for dye methylene blue degradation under UV light and show good stability toward photocatalysis.