Significant Positional Isomeric Effect on Structural Assemblies of Zn(II) and Cd(II) Coordination Polymers Based on Bromoisophthalic Acids and Various Dipyridyl-Type Coligands

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• 作者：Lu-Fang Ma ; Xiu-Qin Li ; Qing-Lei Meng ; Li-Ya Wang ; Miao Du ; Hong-Wei Hou
• 刊名：Crystal Growth & Design
• 出版年：2011
• 出版时间：January 5, 2011
• 年：2011
• 卷：11
• 期：1
• 页码：175-184
• 全文大小：1255K
• 年卷期：v.11,no.1(January 5, 2011)
• ISSN：1528-7505

文摘

Seven Zn(II) and Cd(II) coordination polymers, formulated as {[Zn₂(5-Br-ip)₂(bpy)(H₂O)]路2H₂O}_n (1), {[Zn(5-Br-ip)(bpa)(H₂O)]}_n (2), {[Cd(5-Br-ip)(bpp)(H₂O)]}_n (3), {[Zn(5-Br-ip)(bpe)]}_n (4), {[Zn₂(4-Br-ip)₂(bpy)]路H₂O}_n (5), {[Zn(4-Br-ip)(bpa)(H₂O)]}_n (6), and {[Cd(4-Br-ip)(bpp)]}_n (7), were prepared by hydrothermal reactions based on 4-bromo- or 5-bromoisophthalic acid (4-Br-H₂ip or 5-Br-H₂ip) and different dipyridyl-type coligands 4,4鈥?bipyridyl (bpy), 1,2-bi(4-pyridyl)ethane (bpa), 1,3-di(4-pyridyl)propane (bpp), and 1,2-di(4-pyridyl)ethene (bpe). All complexes 1鈭?b>7 were characterized by elemental analysis, IR spectra, and X-ray single-crystal diffraction. Complex 1 is a 2D (6,3) coordination network and further assembled into a 3D framework via 蟺鈭捪€ stacking interactions. Complex 2 shows a 1D coordination array and further forms a 2D supramolecular network via H-bonding interactions. Complex 3 has a 2-fold interpenetrating 3D diamond framework. Complex 4 is a 3-fold interpenetrating 3D network with CdSO₄ topology, constructed from alternately left- and right-handed helical arrays. Complex 5 has a 3D (3,4)-connected network with (4路8²)(4路8²路10³) topology. Complex 6 features a 1D coordination chain and further forms a 2D helical supramolecular pattern by H-bonding. Complex 7 exhibits a (3,5)-connected 2D layer with the Schl盲fli symbol of (4²路6) (4²路6⁷路8). The results reveal that the diverse coordination networks of 1鈭?b>7 can be adjusted by the different dispositions of the -Br substituent of isophthalate building blocks, as well as the metal ions and the dipyridyl coligands. Moreover, the luminescent properties of the complexes have been investigated.