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首页> 外文期刊>Chemistry: A European journal >Organic Light-Emitting Materials Based on Bis(arylacetylide)platinum(II) Complexes Bearing Substituted Bipyridine and Phenanthroline Ligands: Photo- and Electroluminescence from ~3MLCT Excited States
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Organic Light-Emitting Materials Based on Bis(arylacetylide)platinum(II) Complexes Bearing Substituted Bipyridine and Phenanthroline Ligands: Photo- and Electroluminescence from ~3MLCT Excited States

机译：基于双（芳基乙炔）铂（II）配合物取代双联吡啶和菲咯啉配体的有机发光材料：约3MLCT激发态的光致和电致发光

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摘要

We present the synthesis and photophysical and eledtroluminescent properties for a series of platinum(II) #alpha#-diimine bis(arylacetylide) complexes. The molecular structures of five derivatives have been elucidated by X-ray crystallography. Intermolecular #pi#-#pi# interactions (between aromatic diimine and phenylacetylide moieties) are apparent in the crystal lattices of two of these. All bis(phenylacetylide) derivatives exhibit intense triplet metal-to-ligand charge transfer (MLCT) photoluminescence in the solid state and in fluid solutions at room temperature. The impact of different solvents, substituents on the diimine lignads, and complex concentrations upon their emissive behavior have been examined and demonstrates that their emission energies can be systematically modified. Application of the ~3MLCT excited state of the [Pt(#alpha#-diimine)(C(ident to)C-C(ident to)CPh)_2] (dtbpy=4,4'-di-tert-butyl-2,2'-bipyridine) displays strong solid-state and solution phosphorescence at 77 and 298 K; the associated excited state is proposed to arise from both acetylenic ~3#pi##pi#(C(ident to)C-C(ident to)CPh) and ~3MLCT [Pt -> #pi#(diimine)] transitions.
机译：我们目前的一系列铂（II）＃alpha＃-diimine双（芳基乙炔）配合物的合成，光物理和电致发光性能。通过X射线晶体学已经阐明了五种衍生物的分子结构。在两个分子的晶格中，分子间的π-π-＃π＃相互作用（在芳族二亚胺和苯乙炔基部分之间）是明显的。在室温下，在固态和流体溶液中，所有的双（苯乙炔）衍生物都表现出强烈的三重态金属到配体电荷转移（MLCT）光致发光。已经研究了不同溶剂，取代基对二亚胺丁二烯的影响以及复杂浓度对其发射行为的影响，并证明了它们的发射能可以得到系统地修饰。 [Pt（＃alpha＃-diimine）（C（ident to）CC（ident to）CPh）_2]的〜3MLCT激发态的应用（dtbpy = 4,4'-di-tert-butyl-2,2 '-联吡啶）在77和298 K时显示出很强的固态和溶液磷光;建议相关联的激发态是由炔属〜3＃pi ## pi＃（C（与C-C-CPh）CPh）和〜3MLCT [Pt->＃pi＃（二亚胺）]跃迁产生的。

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