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流莺带银

铁虫 (初入文坛)

[求助] isolated copper的问题

在文献中老是看到表征不同二价铜离子时,总看到有isolated copper和interacting copper等分类,请问isolated copper(孤立的二价铜)是一种什么存在形式呢,能不能说明isolated copper是以单个原子或者很少个原子簇的形式存在呢?谢谢各位大牛!

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luciferosa

木虫之王 (文坛精英)

孤立态Cu一般是在分子筛大笼中,受电荷平衡和纳米限域共同作用而存在的。Cu纳米团簇在分子筛和MOF中都有应用。区分它们比较直观的方法是XAFS。这方面文献实在太多,比如近期发表的Science就涉及孤立态铜离子在SCR反应过程中的可逆二聚变化(ChristopherPaolucci, William F. Schneider, Rajamani Gounder et al. Dynamic multinuclearsites formed by mobilized copper ions in NOx selective catalytic reduction.Science 2017)。

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