Sulfur-driven switching of the Ullmann coupling on Au(111)†,Chemical Communications

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Sulfur-driven switching of the Ullmann coupling on Au(111)†
Chemical Communications ( IF 4.3 ) Pub Date : 2018-03-19 00:00:00 , DOI: 10.1039/c8cc01007b
Jonathan Rodríguez-Fernández _{1,

2,

3,

4} , Søren Birthin Schmidt _{1,

2,

3,

4} , Jeppe V. Lauritsen _{1,

2,

3,

4}

Affiliation

We demonstrate a method to selectively switch the Ullmann coupling reaction of 2,8-dibromodibenzothiophene on a Au(111) support. The Ullmann coupling reaction is effective already at low temperature, but the complete inhibition of the same reaction can be achieved on Au(111) pre-exposed to H₂S. The marked difference in reactivity of pretreated Au(111) is explained by the S-passivation of free Au atoms emerging from reconstruction sites. The inhibited state can be fully lifted by removing the S via hydrogen gas post-exposure.

中文翻译：

硫驱动的Au（111）上Ullmann耦合的切换†

我们演示了一种选择性地切换Au（111）支持上的2,8-二溴二苯并噻吩的Ullmann偶联反应的方法。Ullmann偶合反应在低温下已经有效，但对预先暴露于H ₂ S的Au（111）可以完全抑制相同的反应。从重建位点出现的游离金原子的S钝化。通过经由氢气后暴露去除S ，可以完全解除抑制状态。

更新日期：2018-03-19

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