期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 123, 期 42, 页码 25856-25862出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.9b07493
关键词
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资金
- project HELLAS-CH under the Action for the Strategic Development on the Research and Technological Sector - Operational Programme Competitiveness, Entrepreneurship and Innovation (NSRF 2014-2020) [MIS 5002735]
- European Union (European Regional Development Fund)
- Ministry of Education, Youth and Sports of the Czech Republic [CZ.1.05/2.1.00/19.0377, LM2015073]
- Operational Programme Research, Development and Education-European Regional Development Fund [CZ.02.1.01/0.0/0.0/16_019/0000754]
- ERC (European Union's Horizon 2020) [683024]
Fully fluorinated graphene (fluorographene) exhibits a weak nonlinear optical response, in contrast to its unfunctionalized counterpart, graphene. However, diethyl-amino-functionalized fluorographene is shown to exhibit a dramatic enhancement of its nonlinear optical response. Diethyl-amino-fluorographene is obtained by the reaction of fluorographene with lithium diethylamide. Partial nucleophilic substitution/reduction of the substrate results in sp(3) carbons bonded to diethylamine or fluorine groups and in distinct sp(2) domains. The diethylamine groups act as strong electron donors, the C-F groups as strong electron acceptors, and the sp(2) domains as pi-conjugated bridges, thus forming a donor-pi bridge-acceptor nonlinear optical chromophore scheme. As such, the diethyl-aminofluorographene displays a large enhancement of its nonlinear optical response compared to fluorographene and other fluorographene derivatives under ps, both visible and infrared laser excitation.
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