A series of four-coordinated Pt^II(C^N)(N-donor ligand)Cl-type complexes have been synthesized through a combination of long-size C^N-type and N-donor ligands. In addition, by varying the coordinating site in the N-donor ligand, a distorted molecular configuration has been constructed in these complexes. Their photophysical features, aggregation-induced phosphorescence emission (AIPE) behaviors, electrochemical properties and electroluminescence (EL) performance have been investigated in detail. It has been found that their AIE behaviors can be enhanced by both employing long-size ligands, especially the N-donor ligand, and adopting a distorted molecular configuration, furnishing a high AIE factor (α_AIE) of ca. 13.8. Critically, benefitting from their long-size C^N-type and N-donor ligands, these Pt^II(C^N)(N-donor ligand)Cl-type complexes can exhibit very sensitive AIE behaviors in a mixture of THF–H₂O, indicated by their noticeable emission increase with a low H₂O volumetric fraction (f_w) of ca. 0.1 in their THF solution. In solution-processed organic light-emitting diodes (OLEDs), they can achieve a luminance of 6743 cd m⁻² at 13.5 V, a maximum external quantum efficiency (η_ext) of 13.8%, a maximum current efficiency (η_L) of 42.4 cd A⁻¹ and a maximum power efficiency (η_P) of 34.4 lm W⁻¹, respectively. Hence, this research can provide key information for developing phosphorescent complexes with a highly sensitive AIE response and impressive EL ability.

中文翻译：

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PtII(C^N)(N-供体配体)Cl型配合物表现出高度灵敏的聚集诱导磷光发射(AIPE)行为，由长尺寸配体和扭曲的分子构型实现

通过长尺寸C^N型和N供体配体的组合合成了一系列四配位Pt ^{II (C^N)(N供体配体)Cl型配合物。}此外，通过改变 N-供体配体中的配位位点，在这些复合物中构建了扭曲的分子构型。它们的光物理特征、聚集诱导磷光发射（AIPE）行为、电化学性质和电致发光（EL）性能都得到了详细研究。研究发现，通过使用长尺寸配体（尤其是 N-供体配体）和采用扭曲的分子构型，可以增强它们的 AIE 行为，从而提供约 100% 的高 AIE 因子（α AIE _）。13.8。重要的是，得益于其长尺寸的 C^N 型和 N 供体配体，这些 Pt ^II (C^N)(N 供体配体)Cl 型配合物可以在 THF-H 混合物中表现出非常灵敏的 AIE 行为₂ O，其排放量显着增加，H ₂ O 体积分数 ( f _w ) 约为1左右。在他们的 THF 溶液中为 0.1。在溶液加工的有机发光二极管（OLED）中，它们在13.5 V下可以实现6743 cd m ^-2的亮度，最大外量子效率（η _ext）为13.8%，最大电流效率（η _L）为42.4 cd A ⁻¹和最大功率效率（η _P ) 分别为 34.4 lm W ^-1。因此，这项研究可以为开发具有高度灵敏的 AIE 响应和令人印象深刻的 EL 能力的磷光复合物提供关键信息。