Journal
SCIENCE ADVANCES
Volume 6, Issue 46, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abb4359
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Funding
- National Natural Science Foundation of China [21771154]
- Shenzhen Fundamental Research Programs [JCYJ20190809161013453]
- Natural Science Foundation of Fujian Province of China [2018J01019, 2018J05025]
- Fundamental Research Funds for the Central Universities [20720180019, 20720180016]
- Singapore National Research Foundation Investigatorship [NRF-NRFI2018-03]
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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 downwhen 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.
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