Volume 84, Issue 9 p. 1288-1298
Full Paper

Thiophenol-Modified Fluorographene Derivatives for Nonlinear Optical Applications

Aristeidis Stathis

Aristeidis Stathis

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

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Ioannis Papadakis

Corresponding Author

Ioannis Papadakis

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

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Nikolaos Karampitsos

Nikolaos Karampitsos

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

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Prof. Stelios Couris

Corresponding Author

Prof. Stelios Couris

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

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Dr. Georgia Potsi

Dr. Georgia Potsi

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

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Dr. Athanasios B. Bourlinos

Dr. Athanasios B. Bourlinos

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

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Prof. Michal Otyepka

Corresponding Author

Prof. Michal Otyepka

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

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Prof. Radek Zboril

Prof. Radek Zboril

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

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First published: 29 March 2019
Citations: 14

Graphical Abstract

A clever modification: Two fluorographene derivatives were obtained by partial nucleophilic substitution/reduction of fluorographene (CF) by the methoxythiophenol (MTP) and dimethylaminothiophenol (DMATP) ligands. This modification resulted in donor-π bridge–acceptor graphenic structures, where the CF-MTP/DMATP groups acted as the donor, the sp2 domains as the π bridge, and the residual C−F groups as the acceptor. An ON/OFF switching action of the nonlinear optical properties under nano- and picosecond laser pulses was observed.

Abstract

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.

Conflict of interest

The authors declare no conflict of interest.