Regulating the reactivity of black phosphorus via protective chemistry
Open Access
- 1 November 2020
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science Advances
- Vol. 6 (46), eabb4359
- https://doi.org/10.1126/sciadv.abb4359
Abstract
Rationally regulating the reactivity of molecules or functional groups is common in organic chemistry, both in laboratory and industry synthesis. This concept can be applied to inorganic nanomaterials, particularly two-dimensional black phosphorus (BP) nanosheets. The high reactivity of few-layer (even monolayer) BP is expected to be "shut down"when not required and to be resumed upon application. Here, we demonstrate a protective chemistry-based methodology for regulating BP reactivity. The protective step initiates from binding Al(3+ )with lone pair electrons from P to decrease the electron density on the BP surface, and ends with an oxygen/water-resistant layer through the self-assembly of hydrophobic 1,2-benzenedithiol (BDT) on BP/Al3+ . This protective step yields a stabilized BP with low reactivity. Deprotection of the obtained BP/Al3+ /BDT is achieved by chelator treatment, which removes Al3+ and BDT from the BP surface. The deprotective process recovers the electron density of BP and thus restores the reactivity of BP.Funding Information
- Fundamental Research Funds for the Central Universities (20720180019 and 20720180016)
- National Nature Science Foundation of China (21771154)
- Natural Science Foundation of Fujian Province of China (2018J01019 and 2018J05025)
- Singapore National Research Foundation Investigatorship (NRF-NRFI2018-03)
- Shenzhen Fundamental Research Programs (JCYJ20190809161013453)
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