Five phenylethyne(p-alkoxyphenyl isocyanide)gold(I) complexes with different alkyl chains (OR) in the para-position of the phenyl isocyanide have been successfully synthesized [where R = CH₃ (5a), C₂H₅ (5b), C₄H₉ (5c), C₆H₁₃ (5d), and C₁₀H₂₁ (5e)] and structurally characterized by ¹H NMR, ¹³C NMR, and HRMS. To our surprise, the as-prepared powders of these complexes exhibited different emission colors. The diversity of their mechanochromic luminescence properties has been investigated with photoluminescence spectroscopy, powder X-ray diffraction (XRD) analysis, and single-crystal XRD analysis. The results indicated the presence of weak intermolecular interactions in their crystal structures, and different alkyl chains had obvious impacts on their stacking arrangements and optical behavior. The luminescence quantum yield of 5c was as high as 49.3% in the solid state. Complexes 5a–5e each showed luminescence quenching after grinding.

已成功合成了五种在苯基异氰化物对位具有不同烷基链（OR）的苯基乙炔（对-烷氧基苯基异氰化物）金（I）配合物[其中R = CH ₃（5a），C ₂ H ₅（5b） ，C ₄ H ₉（5c），C ₆ H ₁₃（5d）和C ₁₀ H ₂₁（5e）]，并通过¹ H NMR对其结构进行表征，¹³1 H NMR和HRMS。令我们惊讶的是，这些配合物制备的粉末表现出不同的发射颜色。通过光致发光光谱，粉末X射线衍射（XRD）分析和单晶XRD分析，研究了其机械致变色发光特性的多样性。结果表明它们的晶体结构中存在弱的分子间相互作用，并且不同的烷基链对其堆叠排列和光学行为具有明显的影响。固态的5c的发光量子产率高达49.3％。配合物5a – 5e在研磨后均显示出发光猝灭。