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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Structure and third-order nonlinear optical properties of the two-dimensional Co~II coordination polymer [Co(1,2-BIB)(PA)]_n {1,2-BIB is 1,2-bis[(1H-imidazol-1-yl)methyl]benzene and H_2PA is phthalic acid}
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Structure and third-order nonlinear optical properties of the two-dimensional Co~II coordination polymer [Co(1,2-BIB)(PA)]_n {1,2-BIB is 1,2-bis[(1H-imidazol-1-yl)methyl]benzene and H_2PA is phthalic acid}

机译：二维CO〜II配位聚合物的结构和三阶非线性光学性能[CO（1,2-BIB）（PA）] _ n {1,2-bib是1,2-BIB [（1H-咪唑 - 1-基）甲基]苯和H_2Pa是邻苯二甲酸}

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The design of nonlinear optical (NLO) materials with large NLO responses has been a challenge for materials scientists and chemists. Recently, organic polymers have received attention regarding their NLO properties and fast nonlinear response, and clusters involving delocalized dπ-pπ systems and conjugated dπ-pπ systems are expected to be a new class of NLO materials. Metal-organic coordination polymers combine the advantages of the organic and inorganic species. Thus far, tuning the third-order NLO properties of these materials has been a significant challenge. A two-dimensional coordination polymer, namely poly[(μ-benzene-1,2-dicarboxylato-κ~3O~1,O~1':O~3){μ-1,2-bis-[(1H-imidazol-1-yl)methyl]benzene-κ~2N~3:N~3'}cobalt(II)], [Co(C_8H_4O__4)(C_14H_14-N_4)]_n, was synthesized by hydrothermal methods. In the structure, the Co~II ion is pentacoordinated by two N atoms from two different 1,2-bis[(1H-imidazol-1-yl)methyl]benzene (1,2-BIB) ligands and three O atoms from two symmetry-related benzene-1,2-dicarboxylate (isophthalate, PA) anions. The pentacoordinated Co~II ions are linked by PA ligands to form a chain structure parallel to the c axis. Adjacent chains are further connected by 1,2-BIB ligands to produce a two-dimensional layered structure. The compound exhibits strong third-order nonlinear absorption and nonlinear refraction effects as a thin film. The third-order susceptibility x~(3) is calculated to be 1.07 x 10~-8 esu, which is much larger than the values found for pure inorganic semiconductors and some polymers.
机译：具有大型NLO反应的非线性光学（NLO）材料的设计是材料科学家和化学家的挑战。最近，有机聚合物已经注意到它们的NLO性能和快速非线性响应，并且涉及被删除的DIN-Pπ系统和共轭的DIN-Pπ系统的簇预计将成为新的NLO材料类。金属 - 有机配位聚合物结合了有机和无机物种的优点。到目前为止，调整这些材料的三阶NLO属性是一项重大挑战。二维配位聚合物，即聚[（μ-苯-1,2-二羧酸盐-κ〜3o〜1，O〜1'：O〜3）{μ-1,2-双 - [（1H-咪唑-1-Y1）甲基]苯-κ〜2n〜3：n〜3'}钴（II）]，通过水热方法合成[CO（C_8H_4O_4）] _ N。在该结构中，通过两种不同的1,2-双[（1H-咪唑-1-基）甲基]苯（1,2-BIB）配体和来自两种原子的三个N原子偏向的CO〜II离子。对称相关的苯-1,2-二羧酸盐（邻苯二甲酸酯，PA）阴离子。偏心的CO〜II离子通过PA配体连接，形成平行于C轴的链结构。相邻的链通过1,2-围绕配体进一步连接，以产生二维层状结构。该化合物表现出强烈的三阶非线性吸收和非线性折射效应作为薄膜。三阶敏感性X〜（3）计算为1.07×10〜-8的ESU，远大于纯无机半导体和一些聚合物的值。

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