Thiophenol‐Modified Fluorographene Derivatives for Nonlinear Optical Applications
Authors/Creators
- 1. Department of Physics University of Patras 26504 Patras (Greece); Institute of Chemical Engineering Sciences (ICE-HT) Foundation for Research and Technology-Hellas (FORTH) P.O. Box 1414, Patras 26504 (Greece)
- 2. Regional Centre of Advanced Technologies and Materials Department of Physical Chemistry, Faculty of Science Palacky University in Olomouc Šlechtitelů 27, 779 00 Olomouc (Czech Republic)
Description
The synthesis and characterization of two thiophenol-modified
fluorographene derivatives, namely methoxythiophenol-and
dimethylaminothiophenol-modified fluorographenes, are reported,
while their third-order nonlinear optical response were
thoroughly investigated under both visible (532 nm) and infrared
(1064 nm) with 35 ps and 4 ns laser pulses. The graphene
derivatives were obtained by partial nucleophilic substitution/
reduction of fluorographene by the corresponding organic
thiophenols, and were fully characterized by techniques including
infrared/Raman spectroscopy, X-ray photoelectron spectroscopy,
atomic force spectroscopy, and high-resolution transmission
microscopy. This type of modification resulted in
graphenic structures where the attached thiol groups, sp2
domains, and the residual fluorine groups act as donors, π
bridges, and acceptors, respectively. Both derivatives exhibited
large nonlinear optical response compared to fluorographene,
and have potential applications in optical limiting as an
alternative to fullerenes.
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