N-Heterocyclic Carbenes Reduce and Functionalize Copper Oxide Surfaces in One Pot.
N-Heterocyclic Carbenes Reduce and Functionalize Copper Oxide Surfaces in One Pot.
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DOI：
10.1002/chem.202002308
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发表时间：
2020-05
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通讯作者：
Alex J. Veinot;abrar al-rashed;J. Padmos;I. Singh;Dianne S. Lee;Mina R. Narouz;P. Lummis;C. Baddeley;C. Crudden;J. Horton
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作者：
Alex J. Veinot;abrar al-rashed;J. Padmos;I. Singh;Dianne S. Lee;Mina R. Narouz;P. Lummis;C. Baddeley;C. Crudden;J. Horton
苯并咪唑碳酸氢盐已被证明是N-杂环卡宾的前体，可以一步去除氧化铜表面的氧化物，并对得到的金属表面进行功能化处理。用光谱学方法对表面和刻蚀产物进行了充分的表征。用X-射线光电子能谱对NHC处理前后的表面进行了分析，证实了铜(II)氧化物的完全去除。通过~(13)C标记，我们确定了该转化产物包括环状尿素、开环甲酰胺和双卡宾铜(I)络合物。这些结果说明了NHC使更多种类的金属功能化的潜力，包括那些容易被氧化物处理的金属，极大地促进了在金以外的金属上制备基于NHC的薄膜。
Benzimidazolium hydrogen carbonate salts have been shown to act as N-heterocyclic carbene precursors which can remove oxide from copper oxide surfaces and functionalize the resulting metallic surfaces in a single step. Both the surfaces and the etching products are fully characterized by spectroscopic methods. Analysis of surfaces before and after NHC treatment by X-ray photoelectron spectroscopy demonstrates the complete removal of copper(II) oxide. Using 13 C-labelling, we determine that the products of this transformation include a cyclic urea, a ring-opened formamide and a bis-carbene copper(I) complex. These results illustrate the potential of NHCs to functionalize a much broader class of metals, including those prone to oxide treatment, greatly facilitating the preparation of NHC-based films on metals other than gold.