Abstract:
The present invention relates to a segmented graphene nanoribbon, comprising at least two different graphene segments covalently linked to each other, each graphene segment having a monodisperse segment width, wherein the segment width of at least one of said graphene segments is 4 nm or less and to a method for preparing it by polymerizing at least one polycyclic aromatic monomer compound and/or at least one oligo phenylene aromatic hydrocarbon monomer compound to form at least one polymer and by at least partially cyclodehydrogenating the one or more polymer.
Abstract:
The present invention relates to a segmented graphene nanoribbon, comprising at least two different graphene segments covalently linked to each other, each graphene segment having a monodisperse segment width, wherein the segment width of at least one of said graphene segments is 4 nm or less and to a method for preparing it by polymerizing at least one polycyclic aromatic monomer compound and/or at least one oligo phenylene aromatic hydrocarbon monomer compound to form at least one polymer and by at least partially cyclodehydrogenating the one or more polymer.
Abstract:
The present invention relates to a segmented graphene nanoribbon, comprising at least two different graphene segments covalently linked to each other, each graphene segment having a monodisperse segment width, wherein the segment width of at least one of said graphene segments is 4 nm or less and to a method for preparing it by polymerizing at least one polycyclic aromatic monomer compound and/or at least one oligo phenylene aromatic hydrocarbon monomer compound to form at least one polymer and by at least partially cyclodehydrogenating the one or more polymer.
Abstract:
The present invention relates to a graphene nanoribbon, comprising a repeating unit which comprises at least one modification,wherein the modification is selected from a heteroatomic substitution, a vacancy, a sp 3 hybridization, a Stone-Wales defect, an inverse Stone-Wales defect, a hexagonal sp 2 hybridized carbon network ring size modification, and any combination thereof.
Abstract:
Provided are graphene nanoribbons with controlled zig-zag edge and cove edge configuration and methods for preparing such graphene nanoribbons. The nanoribbons are selected from the following formulae.
Abstract:
The present invention concerns ortho-Terphenyls of general formula (I); wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of H; CN; NO 2 ; and saturated, unsaturated or aromatic C 1 -C 40 hydrocarbon residues, which can be substituted 1 - to 5- fold with F, CI, OH, NH 2 , CN and/or NO 2 , and wherein one or more -CH 2 -groups can be replaced by -O-, -NH-, -S-, -C(=O)O-, -OC(=O)- and/or -C(=O)-; and X and Y are the same or different, and selected from the group consisting of F, CI, Br, I, and OTf (trifluoromethanesulfonate); and their use for the preparation of graphene nanoribbons as well as a process for the preparation of graphene nanoribbons from said ortho-Terphenyls.
Abstract:
The invention relates to oligophenylene monomers of general formula I, wherein R 1 is H, halogene, -OH, -NH 2 , -CN,-NO 2 , or a linear or branched, saturated or un-saturated C 1 -C 40 hydrocarbon residue, which can be substituted 1-to 5-fold with halogene (F, Cl, Br, I), -OH, -NH 2 , -CN and/or -NO 2 , and wherein one or more CH 2 -groups can be replaced by -O-, -S-, -C(O)O-, -O-C(O)-, -C(O)-, -NH-or – NR 3 -, wherein R 3 is an optionally substituted C 1 -C 40 hydrocarbon residue, or an optionally substituted aryl, alkylaryl, alkoxyaryl, alkanoyl or aroyl residue; R 2a and R 2b are H, or optionally one or more of the pairs of adjacent R 2a /R 2b is joined to form a single bond in a six-membered carbocycle; m is an integer of from 0 to 3; n is 0 or 1; and X is halogene or trifluoromethylsulfonate, and Y is H; or X is H, and Y is halogene or trifluoromethylsulfonate. The invention further relates to polymeric precursors as well as methods for preparing graphene nanoribbons from the oligophenylene monomers and the polymeric precur- sors.
Abstract:
The present invention relates to a process for preparing a graphene nanoribbon, which comprises: (a) providing at least one aromatic monomer compound which is selected from at least one polycyclic aromatic monomer compound, at least one oligo phenylene aromatic monomer compound, or combinations thereof, on a solid substrate, (b) polymerization of the aromatic monomer compound so as to form at least one polymer on the surface of the solid substrate, (c) at least partially cyclodehydrogenating the one or more polymers of step (b), wherein at least step (b) is carried out at a total pressure p(total) of at least 1 x 10 -9 mbar; and a partial oxygen pressure p(O 2 ) and partial water pressure p(H 2 O) which satisfy the following relation: p(O 2 ) x p(H20) -14 mbar 2 .
Abstract:
The present invention concerns ortho-Terphenyls of general formula (I); wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of H; CN; NO 2 ; and saturated, unsaturated or aromatic C 1 -C 40 hydrocarbon residues, which can be substituted 1 - to 5- fold with F, CI, OH, NH 2 , CN and/or NO 2 , and wherein one or more -CH 2 -groups can be replaced by -O-, -NH-, -S-, -C(=O)O-, -OC(=O)- and/or -C(=O)-; and X and Y are the same or different, and selected from the group consisting of F, CI, Br, I, and OTf (trifluoromethanesulfonate); and their use for the preparation of graphene nanoribbons as well as a process for the preparation of graphene nanoribbons from said ortho-Terphenyls.
Abstract:
The present invention relates to a process for preparing a graphene nanoribbon, which comprises: (a) providing at least one aromatic monomer compound which is selected from at least one polycyclic aromatic monomer compound, at least one oligo phenylene aromatic monomer compound, or combinations thereof, on a solid substrate, (b) polymerization of the aromatic monomer compound so as to form at least one polymer on the surface of the solid substrate, (c) at least partially cyclodehydrogenating the one or more polymers of step (b), wherein at least step (b) is carried out at a total pressure p(total) of at least 1 x 10 -9 mbar; and a partial oxygen pressure p(O 2 ) and partial water pressure p(H 2 O) which satisfy the following relation: p(O 2 ) x p(H20) -14 mbar 2 .