Non-Centrosymmetric Coordination Polymer with a Highly Hindered Octahedral Copper Center Bridged by Mandelate

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• 作者：Makoto Moriya ; Shingo Tominaga ; Takayoshi Hashimoto ; Kazuki Tanifuji ; Tsuyoshi Matsumoto ; Yasuhiro Ohki ; Kazuyuki Tatsumi ; Junichi Kaneshiro ; Yoshiaki Uesu ; Wataru Sakamoto ; Toshinobu Yogo
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：April 16, 2012
• 年：2012
• 卷：51
• 期：8
• 页码：4689-4693
• 全文大小：357K
• 年卷期：v.51,no.8(April 16, 2012)
• ISSN：1520-510X

文摘

A novel chiral coordination polymer, [Cu(C₆H₅CH(OH)COO)(渭-C₆H₅CH(OH)COO)] (1-L and 1-D), was synthesized through a reaction of copper acetate with l-mandelic acid at room temperature. Although previously reported copper mandelate prepared by hydrothermal reaction was a centrosymmetric coordination polymer because of the racemization of mandelic acid, the current coordination polymer shows noncentrosymmetry and a completely different structure from that previously reported. The X-ray crystallography for 1-L revealed that the copper center of the compound showed a highly distorted octahedral structure bridged by a chiral mandelate ligand in the unusual coordination mode to construct a one-dimensional (1D) zigzag chain structure. These 1D chains interdigitated each other to give a layered structure as a result of the formation of multiple aromatic interactions and hydrogen bonds between hydroxyl and carboxylate moieties at mandelate ligands. The coordination polymer 1-L belongs to the noncentrosymmetric space group of C2 to show piezoelectric properties and second harmonic generation (SHG) activity.