AuCl(PMe₃) and AuCl(PEt₃) were used to react with quinoline-8-thiolate (8-QNS) to give three Au(I) complexes, i.e., [8-QNS(AuPMe₃)₂]ClO₄ (1), [(8-QNS)₂Ag(AuPMe₃)₂]ClO₄ (2), and [8-QNS(AuPEt₃)₂]ClO₄ (3), which have been structurally determined by X-ray diffraction to show various intra- and intermolecular metal···metal contacts (i.e., metal = Au(I) or Ag(I)). All complexes displayed solid-state luminescence at 535–568 nm, which is most likely attributed to an intraligand transition of 8-QNS and/or a S → Au(I) charge-transfer transition, possibly modified by Au(I)···Au(I) interactions. Notably, complex 1·CH₂Cl₂ exhibited remarkable mechanochromic luminescence from 535 to 601 nm upon grinding. While immersed in various solvents for the ground powder samples of complex 1·CH₂Cl₂, the luminescence at 601 nm mostly reverted to the original luminescence. Powder X-ray diffraction measurements indicated that complex 1·CH₂Cl₂ underwent structural transformation from a crystalline to an amorphous phase upon grinding, and it can be restored to the original crystalline phase upon immersion in various solvents. Additionally, the reversible experiments of complex 1·CH₂Cl₂ for the grinding and immersion actions were performed for up to five cycles. Moreover, the time-dependent luminescence spectra for the crystalline samples of complex 1·CH₂Cl₂ were measured, and they showed a significant luminescence change from 535 to 590 nm within 2 days.

中文翻译：

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Au（I） 喹啉-8-硫醇酸盐的超分子组装、溶剂诱导和机械变色发光


用 AuCl（PMe₃） 和 AuCl（PEt₃） 与喹啉-8-硫代酸酯 （8-QNS） 反应，得到三种 Au（I） 配合物，即 [8-QNS（AuPMe₃）₂]ClO₄ （1）、[（8-QNS）₂Ag（AuPMe₃）₂]ClO₄ （2） 和 [8-QNS（AuPEt₃）₂]ClO₄ （3），它们通过X射线衍射在结构上被确定，显示出各种分子内和分子间金属···金属触点（即金属 = Au（I） 或 Ag（I））。所有复合物在 535–568 nm 处均表现出固态发光，这很可能归因于 8-QNS 的配体内转变和/或 S → Au（I） 电荷转移转变，可能被 Au（I）···Au（I） 交互作用。值得注意的是，复合物 1·CH₂Cl₂ 在研磨后在 535 至 601 nm 范围内表现出显着的机械变色发光。同时浸入各种溶剂中，用于研磨的粉末样品的复合物 1·CH₂Cl₂ 时，601 nm 处的发光大部分恢复到原来的发光。粉末 X 射线衍射测量表明，配合物 1·CH₂Cl₂ 在研磨时经历了由结晶相转变为无定形相的结构转变，浸入各种溶剂中后可恢复到原来的结晶相。此外，复数 1·CH₂Cl₂ 用于研磨和浸泡动作，最多执行五个循环。此外，复合物 1·测量 CH₂和 Cl₂，它们在 2 天内显示出从 535 到 590 nm 的显着发光变化。