Synthesis and superior optical-limiting properties of fluorene-thiophene-benzothiadazole polymer-functionalized graphene sheets.
A polymer based on fluorene, thiophene, and benzothiadazole as the donor-spacer-acceptor triad is covalently coupled to reduced graphene oxide (rGO) sheets via diazonium coupling with phenyl bromide, followed by Suzuki coupling. These polymer-graphene hybrids show good solubility in organic solvents, such as chloroform, tetrahydrofuran (THF), toluene, dichlorobenzene, and N,N-dimethylformamide (DMF), and exhibit an excellent optical-limiting effect with a 532-nm laser beam. The optical-limiting threshold energy values (0.93 J cm(-2) for G-polymer 1 and 1.12 J cm(-2) for G-polymer 2) of these G-polymer hybrids are better than that of carbon nanotubes (3.6 J cm(-2)).
Midya
Anupam
A
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543.
Mamidala
Venkatesh
V
Yang
Jia-Xiang
JX
Ang
Priscilla Kai Lian
PK
Chen
Zhi-Kuan
ZK
Ji
Wei
W
Loh
Kian Ping
KP
D005449:Fluorenes / Q000737:chemistry*; D006108:Graphite / Q000138:chemical synthesis* / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry*; D012995:Solubility; D013830:Thiadiazoles / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
D005449:Fluorenes; D011108:Polymers; D013830:Thiadiazoles; D013876:Thiophenes; C015700:benzo-1,2,3-thiadiazole; C041509:fluorene; D006108:Graphite