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Coexistence of Cu(II) and Cu(I) in Cu ion doped zeolitic imidazolate frameworks (ZIF-8) for dehydrogenative coupling of silanes with alcohols

Abstract

Metal-ion-doped zeolitic imidazolate frameworks have got much attention for their structure tailorability and potential catalytic application. Herein, Cu ion doped ZIF-8 nanocrystals were successfully prepared by mechanical grinding of Cu(NO3)2, ZnO and 2-methylimidazole (HMeIM) with ethanol as an additive. Unlike the general view that only Cu(II) was present in Cu-doped ZIF-8, we found the coexistence of Cu(II) and Cu(I) in this material, which was supported by XPS and X-ray induced Auger electron spectroscopy (XAES) characterization. And ethanol may act as a reducer to induce the reduction of Cu(II) during synthesis. As the mixture valence of Cu ions, Cu ion doped ZIF-8 nanocrystals showed excellent catalytic performance for dehydrogenative coupling of silanes with alcohols.

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Publication details

The article was received on 05 Aug 2019, accepted on 07 Oct 2019 and first published on 11 Oct 2019


Article type: Paper
DOI: 10.1039/C9DT03181B
Dalton Trans., 2019, Accepted Manuscript

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    Coexistence of Cu(II) and Cu(I) in Cu ion doped zeolitic imidazolate frameworks (ZIF-8) for dehydrogenative coupling of silanes with alcohols

    Y. Dai, P. Xing, X. Cui, Z. Li and X. Zhang, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT03181B

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