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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Lewis acidic zinc(ii) salen-type Schiff-base complexes: sensing properties and responsive nanostructures
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Lewis acidic zinc(ii) salen-type Schiff-base complexes: sensing properties and responsive nanostructures

机译：Lewis酸性锌（II）盐型Schiff-碱基复合物：感测性能和响应性纳米结构

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摘要

In this frontier article some peculiar characteristics of Zn(salen)-type Schiff-base complexes are reviewed. The paper is mainly focused on the most recent and relevant achievements on responsive supramolecular nanostructures and sensing properties, both of them related to the Lewis acidic character of the Zn-II centre in these molecular species, providing an interpretation of these features. The sensing properties of Zn(salen)-type complexes mainly originate from optical spectroscopic changes associated with the formation of the adducts upon addition of a Lewis base (analyte), either by deaggregation of dimeric species or displacement of the solvent coordinated to the metal centre. In both cases the direct sensing is related either to the Lewis acidic character of the complex as well as to the Lewis basicity of the analyte. The formation of responsive nanostructures with fluorescent, and/or vapochromic, mechanochromic, and thermochromic characteristics is driven by non-mutual intermolecular ZnMIDLINE HORIZONTAL ELLIPSISO interactions, further stabilized by pi-pi stacking interactions and/or interdigitation of the alkyl side groups. The Lewis acidic character is not a prerogative of Zn(salen)-type complexes of tetradentate Schiff-bases. Many other classes of Zn-II complexes can possess this property. A correct interpretation of their chemistry is certainly useful for further development of these classical coordination compounds as new molecular materials.
机译：本文综述了锌（salen）型席夫碱配合物的一些特殊性质。本论文主要集中在响应性超分子纳米结构和传感特性方面的最新和相关成果，这两个方面都与这些分子物种中Zn II中心的Lewis酸性特征有关，提供了对这些特征的解释。Zn（salen）型配合物的传感特性主要来源于加入Lewis碱（分析物）后与加合物形成相关的光谱变化，通过二聚体物种的解聚或与金属中心配位的溶剂的置换。在这两种情况下，直接传感要么与络合物的路易斯酸性特征有关，要么与分析物的路易斯碱性有关。具有荧光、和/或蒸气变色、机械变色和热变色特性的响应性纳米结构的形成是由非相互分子间ZnMIDLINE水平椭圆相互作用驱动的，通过π-π堆积相互作用和/或烷基侧基的交指进一步稳定。Lewis酸性不是四齿席夫碱Zn（salen）型配合物的特权。许多其他种类的锌II配合物也可以具有这种性质。对它们的化学性质的正确解释无疑有助于这些经典配位化合物作为新的分子材料的进一步发展。

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