Gold does not react with H₂ to form bulk hydrides. Here we report the synthesis and characterization of a gold nanohydride protected by diphosphine ligands, [Au₂₂H₄(dppo)₆]²⁺ [dppo=1,8‐bis(diphenylphosphino)octane]. The Au₂₂ core consists of two Au₁₁ units bonded by eight Au atoms not coordinated by the diphosphine ligands. The four H atoms are found to bridge the eight uncoordinated Au atoms at the interface. Each Au₁₁ unit can be viewed as a tetravalent superatom forming four delocalized Au‐H‐Au bonds, similar to the quadruple bond first discovered in the [Re₂Cl₈]²⁻ inorganic cluster. The [Au₂₂H₄(dppo)₆]²⁺ nanohydride is found to lose H atoms over an extended time via H evolution (H₂), proton (H⁺) and hydride (H⁻) releases. This complete repertoire of H‐related transformations suggests that the [Au₂₂H₄(dppo)₆]²⁺ nanohydride is a versatile model catalyst for understanding the mechanisms of chemical reactions involving hydrogen on the surface of gold nanoparticles.

中文翻译：

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受配体保护的纳米金氢化物簇的合成，键合和转化

金不与H ₂反应形成大块氢化物。在这里，我们报告了由二膦配体[Au ₂₂ H ₄（dppo）₆ ] ²⁺ [dppo = 1,8-双（二​​苯基膦基）辛烷]保护的纳米金氢化物的合成与表征。Au ₂₂核由两个Au ₁₁单元组成，两个₁₁ Au单元由八个不与二膦配体配位的Au原子结合。发现四个H原子在界面处桥接八个未配位的Au原子。每个Au ₁₁单元都可以视为形成四个离域Au-H-Au键的四价超原子，类似于[Re ₂ Cl ₈ ] ^2−中首次发现的四键。无机团簇。的[金₂₂ ħ ₄（dppo）₆ ] ²⁺ nanohydride被发现失去H原子在过孔H，演进（H延长的时间₂），质子（H ⁺）和氢化（H ^- ）版本。这种与H有关的转变的完整表述表明，[Au ₂₂ H ₄（dppo）₆ ] ²⁺纳米氢化物是一种通用的模型催化剂，用于了解金纳米颗粒表面涉及氢的化学反应机理。