Two series of new heterobimetallic Au(I)–Pt(II) polyynes have been easily synthesized by cross-coupling under mild conditions. The absorption profiles of these two series of Au(I)–Pt(II) polyynes are quite similar. However, the Au(I)–Pt(II) polyynes with a 1,4-bis(diphenylphosphino)benzene ligand show stronger triplet (T₁) emission and superior optical power limiting (OPL) performance than the corresponding Au(I)–Pt(II) polyynes with a 1,3-bis(diphenylphosphino)propane ligand. Hence, the 1,4-bis(diphenylphosphino)benzene ligand is more effective than the 1,3-bis(diphenylphosphino)propane ligand for optimizing the transparency and OPL ability of OPL materials. When compared with the corresponding homometallic Pt(II) polyynes, these heterobimetallic Au(I)–Pt(II) polyynes display a blue shift in their absorption spectra, showing better transparency in the visible-light region. Besides, these heterobimetallic Au(I)–Pt(II) polyynes show stronger OPL ability than their corresponding homometallic Pt(II) polyynes as well as the state-of-the-art OPL material C₆₀, demonstrating their enormous application potential in the nonlinear optics field. In brief, the introduction of Au(I) precursors with tetrahedral diphosphine ligands into the backbone of Pt(II) polyynes can simultaneously achieve enhanced transparency and high OPL ability for OPL materials, providing a new strategy to optimize OPL materials.

中文翻译：

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新型异双金属Au（i）-Pt（ii）聚炔在透明度和光功率限制性能之间实现了良好的折衷†

通过在温和条件下进行交叉偶联，可以轻松合成两个系列的新型异双金属Au（I）-Pt（II）多炔。这两个系列的Au（I）-Pt（II）多炔的吸收曲线非常相似。然而，在Au（我）-Pt（II）polyynes与1,4-双（二苯基膦基）苯配体表现出更强的三重态（T ₁）的发射和优越的光学功率限制比相应的Au（（OPL）性能我） -铂（II）具有1,3-双（二苯基膦基）丙烷配体的聚炔。因此，在优化OPL材料的透明度和OPL能力方面，1,4-双（二苯基膦基）苯配体比1,3-双（二苯基膦基）丙烷配体更有效。与相应的同金属Pt（II）聚炔相比，这些异双金属Au（I）-Pt（II）聚炔在其吸收光谱中显示出蓝移，从而在可见光区域显示出更好的透明度。此外，这些异双金属Au（I）–Pt（II）聚炔比相应的均金属Pt（II）聚炔和最新的OPL材料C ₆₀表现出更强的OPL能力。，证明了它们在非线性光学领域的巨大应用潜力。简而言之，将具有四面体二膦配体的Au（I）前体引入Pt（II）聚炔的骨架可以同时提高OPL材料的透明度和高OPL能力，从而提供了一种优化OPL材料的新策略。