Zn3(4-OOCC6H4PO3)2: A polar metal phosphonate with pillared layered structure showing SHG-activity and large dielectric anisotropy
Zn3(4-OOCC6H4PO3)2: A polar metal phosphonate with pillared layered structure showing SHG-activity and large dielectric anisotropy
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DOI：
10.1039/c0dt00647e
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发表时间：
2010-01-01
影响因子：
4
通讯作者：
Zheng, Li-Min
中科院分区：
文献类型：
--
作者：
Li, Jin-Tang;Cao, Deng-Ke;Zheng, Li-Min
本文报道了一种新的金属膦酸盐Zn-3（4-OOCC_6 H_4PO_3）（2）（1），晶体属正交晶系，空间群为Pca_2（1）。它显示了一个柱层状结构，其中{ZnO 4}，{ZnO 5}和{PO 3 C}多面体通过角或边共享连接，形成一个无机层，在ab平面，其中包含4-和5-元环。这些层由单向4-carboxylatephenylphosphonate配体柱撑，从而导致极性3D架构。1的单晶的介电各向异性测量揭示，介电常数沿着层间大于沿沿着层内，比率约为2.3。观察到二次谐波产生（SHG）活性。
A new metal phosphonate Zn-3(4-OOCC6H4PO3)(2) (1) is reported which crystallizes in orthorhombic space group Pca2(1). It shows a pillared layered structure in which the {ZnO4}, {ZnO5} and {PO3C} polyhedra are connected through corner-or edge-sharing to form an inorganic layer in the ab plane which contains 4- and 5-member rings. These layers are pillared by the uni-oriented 4-carboxylatephenylphosphonate ligands, thus leading to a polar 3D architecture. The dielectric anisotropy measurements of a single crystal of 1 reveal that dielectric constant along the inter-layer is larger than that along the intra-layer with a ratio of about 2.3. Second harmonic generation (SHG) activity is observed.