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首页> 外文期刊>Chemistry: A European journal >Synthesis and photophysical properties of self-assembled metallogels of platinum(II) acetylide complexes with elaborate long-chain pyridine-2,6- dicarboxamides
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Synthesis and photophysical properties of self-assembled metallogels of platinum(II) acetylide complexes with elaborate long-chain pyridine-2,6- dicarboxamides

机译：具有精细长链吡啶-2,6-二羧酰胺的乙炔铂（II）配合物的自组装金属茂化合物的合成和光物理性质

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摘要

A series of platinum(II) acetylide complexes with elaborate longchain pyridine-2,6-dicarboxamides was synthesized. These metal complexes are capable of immobilizing organic solvents to form luminescent metallogels through a combination of intermolecular hydrogen bonding, aromatic π- p, and van der Waals interactions. Fibrillar morphologies were identified by TEM for these metallogels. Unique photophysical properties associated with the sol-to-gel transition have been disclosed with luminescence enhancement at elevated temperatures, which is in sharp contrast to typical thermotropic organogels or metallogels reported in the literature. Such unusual luminescence enhancement is attributed to the increased degree of freedom at higher temperatures that results in the formation of favorable molecular aggregates in the excited state through enhanced aromatic π-π and metallophilic PtII?PtII interactions. Structurally similar Pt-bp3 is not able to gel any common organic solvents. The inability of Pt-bp3 to form gels illustrates the importance of gelation to the macroscopic photophysical properties; Pt-bp3 does not show emission enhancement at elevated temperatures due to its low tendency to form strong aggregates in the ground state.
机译：合成了一系列具有复杂的长链吡啶-2,6-二甲酰胺的铂（II）乙炔化物配合物。这些金属配合物能够通过分子间氢键，芳族π-p和范德华相互作用的结合而固定有机溶剂，从而形成发光的金属茂。通过TEM鉴定了这些成矿物质的原纤维形态。已经公开了与溶胶-凝胶转变有关的独特的光物理性质，并且在高温下具有发光增强，这与文献中报道的典型的热致有机凝胶或金属茂形成鲜明对比。这种异常的发光增强归因于在较高温度下自由度的增加，该自由度通过增强的芳族π-π和亲金属的PtII→PtII相互作用而在激发态下形成有利的分子聚集体。结构相似的Pt-bp3无法凝胶任何常见的有机溶剂。 Pt-bp3无法形成凝胶说明了凝胶化对宏观光物理性质的重要性。 Pt-bp3由于在基态下形成强聚集体的趋势较低，因此在高温下并未显示出增强的排放。

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