摘要:
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.
摘要:
The present invention relates to compounds of the formulae Ia,Ib and Ic in which R are identical or different aryloxy, arylthio, hetaryloxy, hetarylthio, aryl, diarylamino or dialkylamino radicals, n when m is 0: 0, 1, 2 or 3, when m is 1: 0, 1, 2, 3, 4 or 5, m is 0 or 1, A is -COOM, -SO 3 M or -PO 3 M, M is hydrogen, an alkali metal cation or [NR'] 4+ , R' is hydrogen or alkyl, where the R' radicals may be the same or different, B is C 1 -C 6 -alkylene or 1,4-phenylene, where the phenylene radical may be 2 mono-or polysubstituted by alkyl, nitro, cyano and/or halogen, L is a chemical single bond or a bridge of the formula -(Het)Ar-or –(Het)Ar-(Het)Ar- which may be mono-or polysubstituted by phenyl, alkyl, alkoxy, alkylthio and/or -NR 4 R 5 and in which (Het)Ar is aryl or hetaryl which may be fused to saturated or unsaturated 5-to 18-membered rings which maycomprise heteroatoms, where, in the case of two (Het)Ar, these may be the same or different, q is 0 or 1, R 1 , R 2 are each independently radicals of the formula IIa, IIb or IIc R 3 is phenyl, alkyl, alkoxy, alkylthio or -NR 6 R 7 , X is C(R 8 R 9 ) 2 , NR 10 , oxygen or sulfur, R 4 to R 10 are each independently hydrogen, alkyl whose carbon chain may be interrupted by one or more -O-, -S-, -CO-, -SO- and/or -SO 2 -moieties, or aryl or hetaryl, each of which may be mono-or polysubstituted by alkyl, alkoxy and/or alkylthio, p is 0, 1, 2, 3, 4 or 5, Y is NR 11 or sulfur, and R 11 is hydrogen, alkyl whose carbon chain may be interrupted by one or more -O-, -S-, -CO-, -SO- and/or -SO 2 -moieties, or aryl, hetaryl, aralkyl or hetaralkyl. The present invention further relates to the use of compounds of the formulae Ia, Ib and Ic or mixtures of compounds of the formulae Ia, Ib and Icand/or isomers thereof or mixtures of isomers of the compounds of the formulae Ia, Ib and Ic as photosensitizers in solar cells and photodetectors, and to solar cells and photodetectors comprising compounds of the formulae Ia, Ib and Ic or mixtures of compounds of the formulae Ia, Ib and Ic and/or isomers thereof or mixtures of isomers of the compounds of the formulae Ia, Ib and Ic as photosensitizers.
摘要:
Oligophenylene monomers for the synthesis of polymeric precursors for the preparation of graphene nanoribbons, the polymeric precursors, and methods for preparing them, as well as methods for preparing the graphene nanoribbons from the polymeric precursors and the monomers are provided.
摘要:
The invention relates to a process for producing graphene nanotapes in the presence of an anisotropic metal surface which induces three-dimensional orientation of nanotapes.
摘要:
The invention relates to a method for coating nanoparticles with graphene, comprising the steps: (a) providing a suspension, comprising a suspension medium and nanoparticles having a positive surface charge; (b) adding graphene oxide particles to the suspension from step (a), wherein the graphene oxide particles deposit on the nanoparticles; and (c) converting the graphene oxide particles deposited on the nanoparticles into graphene, nanoparticles coated with graphene, containing at least one metal, a metalloid, a metal compound and/or a metalloid compound. The invention further relates to the use of said graphene-coated nanoparticles in electrochemical cells and super capacitors, and to super capacitors and electrochemical cells containing said nanoparticles.
摘要:
The invention relates to a method for producing two-dimensional nano-materials, comprising the following steps: (a) providing (a1) a mixture containing graphene oxide particles, water and at least one cationic surfactant and/or non-ionic surfactant or (a2) a mixture containing graphene particles, at least one solvent that can be used for chemically splitting graphite, and at least one cationic surfactant and/or non-ionic surfactant, (b) adding at least one sol precursor compound to the mixture from step (a), (c) allowing the mixture from step (b) to react in a sol-gel process forming gel from the at least one sol precursor compound on the graphene oxide particles or the graphene particles, (d) removing the at least one surfactant and (e) optionally heating the graphene oxide particles coated with gel for at least 1 minute to at least 500ºC in an inert gas atmosphere in order to reduce the graphene oxide to graphene.
摘要:
The invention relates to copolymer-modified nanoparticles which are producible by a process in which nanoparticles are ablated by means of laser radiation from the surface of a substrate in a liquid comprising an amphiphilic, preferably random copolymer. The invention further comprises copolymer-modified nanoparticles, said copolymer having the formula (II): The invention also comprises polymers, semifinished products, finished products, end products and medical articles which comprise the copolymer-modified nanoparticles.
摘要:
The present invention relates to an apparatus and a method for fast and reliable online detection of triacetone triperoxide (TATP), with at least three differently coated HFF quartz crystal oscillator sensors (29).
摘要:
The present invention relates to an optically transparent conductive carbon-based film which is suitable for use as an electrode in optoelectronic devices etc. Further, the invention relates to a process for the production of the transparent conductive carbon film and the use thereof in electronic devices. Organic solar cells using transparent conductive carbon film as electrode display comparable performance with cells using ITO. These carbon films show high thermal and chemical stability, ultra-smooth surface, and good adhesion to substrates.