1108157-34-1Relevant articles and documents
Photochemical site-selective synthesis of [70]methanofullerenes
Vidal, Sara,Izquierdo, Marta,Law, Wai Kit,Jiang, Kui,Filippone, Salvatore,Perles, Josefina,Yan, He,Martín, Nazario
, p. 12733 - 12736 (2016)
Methanofullerenes such as the well-known [70]PCBM are commonly synthesized under harsh conditions to obtain the product as a mixture of site-isomers (namely α, β and minor γ) due to the D5h symmetry of the C70 cage. We report the fir
Synthetic method for ultraviolet absorbent namely 4,4'-dihexyloxybenzophenone
-
, (2017/09/13)
The invention discloses a synthetic method for an ultraviolet absorbent namely 4,4'-dihexyloxybenzophenone. The method comprises the following steps: with p-hydroxybenzoic acid as a starting material, carrying out acetylation to protect hydroxy; carrying out a Fredel-Crafts reaction of p-acetoxybenzoic acid and phenol under the catalysis of zinc chloride and phosphorus oxychloride so as to synthesize an intermediate namely phenyl p-hydroxybenzoate; then carrying out deacetylation to remove the protective group, and carrying out Fries rearrangement so as to prepare an intermediate namely 4,4-dihydroxybenzophenone; and forming a salt with 4,4-dihydroxybenzophenone and potassium carbonate, and carrying out a Williamson reaction of 1-bromohexane and the potassium salt of 4,4-dihydroxybenzophenone through catalysis of tetrabutylammonium bromide so as to synthesize the 4,4'-dihexyloxybenzophenone. The synthetic method provided by the invention has the advantages of mild reaction conditions, normal pressure, medium and low temperature, stable quality control, high raw material conversion rate, effective inhibition of side reactions, fewer three wastes, light pollution, and facilitation of protecting the environment and labor of a producer.
A new family of bent-core C2-symmetric liquid crystals
Hope-Ross, Kyle A.,Heiney, Paul A.,Kadla, John F.
supporting information; experimental part, p. 639 - 645 (2010/08/21)
A series of C2-symmetric compounds with different core sizes and varying lengths and numbers of alkoxy side chains were prepared, and the factors influencing their liquid crystalline mesophase behaviour were investigated. The compounds studied were based on benzophenone, dibenzylidene-acetone, and 1,9-diphenyl-nona-1,3,6,8-tetraen-5-one cores with either 1 or 2 linear alkoxy side chains. The side chains were varied in length from C6H13 to C12H25. The liquid crystalline mesophase behaviour of the compounds was investigated using differential scanning calorimetry, polarizing optical microscopy, and small-angle X-ray scattering (SAXS). It was found that a number of the molecules were able to self-assemble into smectic and nematic liquid crystalline phases.
