One‐Step Synthesis of Janus Fluorographene Derivatives

Abstract

Fluorographene, at wo-dimensional derivativeo f graphene, is an excellent starting materialf or the synthesis of graphene derivatives. In this work, ao ne-step, substratefree method for the asymmetricf unctionalization of fluorographene layers with hydroxyl groups by af acile nucleophilic substitution reactioni sr eported. Such ac hemical modification occurs in ab iphasic aqueous-organic system under mild conditions, leading to Janus graphene nanosheets functionalized by hydroxyl groups on one side and retaining fluorine atoms on the other.T he reported experimental route paves the way for two-dimensional bifacial graphene templates, thus broadening the application potential of graphene materials.

Recent Advances in Fluorinated Graphene from Synthesis to Applications: Critical Review on Functional Chemistry and Structure Engineering

“…The obtained bifunctional product exhibited entirely different self-assembly behaviors in various solvents. [82] In conclusion, by taking advantage of the unique functional chemistry of FG, specific functional groups are designed to be grafted onto the graphene surface, which opens a universal route for the functionalization and even multifunctionalization of graphene, which further expands its application fields. In addition, the generality of its derivative chemistry for some other classical organic reactions has been verified.…”

“…On the basis of derivative reactions of FG, it is toilless to directly prepare multifunctional graphene-based materials and expand the applications of FG. [77][78][79]82,83,[258][259][260] Similar to the structure engineering of CF bonds in FG sheets, the structure engineering based on the derivative reaction of FG is also one of the important strategy to optimize the structure and the corresponding performance, such as controlling the modified region of the FG derivatives. Otyepka et al found that the CF bonds of FG increase the polarity of surrounding aromatic regions and facilitated the photo-induced cyclization reaction.…”

“…[63][64][65][66][67][68][69][70][71] Apart from physical properties, chemical properties of FG have been thoroughly analyzed as one important direction in recent years. [33,[72][73][74][75][76][77][78][79][80][81][82][83] Although classical organic chemistry generally believes that the CF bond has a large bond energy and thus are chemical inert, the special nature of the CF bond that originates from the 2D structure of this carbon material enhances its chemical reactivity significantly. For this aspect, Otyepka et al introduced the derivative chemistry of FG in a mini review in 2017.…”

“…[33] Thereafter, the in-depth mechanism of derivative chemistry and its expansive applications were further investigated. [77,84,85] Meanwhile, a variety of derivative reactions have been explored on FG surface recently, such as nucleophilic substitution, [72,73,76,81,82,[86][87][88][89][90] free radical grafting, [80,91] and some classical organic chemistry processes like Friedel-Crafts reaction, [77] Suzuki-Miyaura reaction, [83] and Sonogashira CC cross-coupling reaction. [78] This opens a universal route for the functionalization and even multifunctionalization of the graphene skeleton toward various graphene derivatives.…”

Spin filtering controller induced by phase transitions in fluorographane

“…[2][3][4] In particular, signicant effort has been devoted to engineer a band gap in graphene by introducing structural defects 5 or by surface functionalization with H or F atoms. 6,7 Aer covering graphene with heteroatoms, the band gap is opened due to the transformation of sp 2 -hybridized carbon into sp 3 hybridized carbon. In contrast to graphene, hydrogenated graphene exhibits uorescence, 8 paramagnetism, 9 fast heterogeneous electron transfer, 10 and tunable band gap (0-3.7 eV).…”