124-73-2Relevant articles and documents
CO2 laser induced IRMPD of 2-bromo-2-chloro-1,1,1 -trifluoroethane: Time-resolved luminescence studies
Pushpa,Kumar, Awadhesh,Vatsa,Naik,Annaji Rao,Mittal,Parthasarathy,Sarkar
, p. 167 - 173 (1996)
The IRMPD of 2-bromo-2-chloro-1,1,1-trifluoroethane gives rise to an intense visible light emission between 350 and 750 nm due to various carbenes. The effect of various experimental parameters such as laser energy, pulse duration and substrate pressure on the emission has been studied. Infrared fluorescence studies have also been carried out to explore the vibrational excitation of the photoproducts. A self-consistent mechanism is proposed explaining the complex photodissociation dynamics of the system.
Synthesis of a sun-shaped amphiphilic copolymer consisting of a cyclic perfluorocyclobutyl aryl ether-based backbone and lateral PMAA side chains
Yao, Wenqiang,Li, Yongjun,Feng, Chun,Lu, Guolin,Huang, Xiaoyu
, p. 52105 - 52116 (2014)
A novel amphiphilic sun-shaped copolymer, c-PMBTFVB-g-PMAA (MBTFVB: 2-methyl-1,4-bistrifluorovinyloxybenzene, MAA: methacrylic acid) containing a cyclic perfluorocyclobutyl (PFCB) aryl ether-based backbone and PMAA lateral side chains with narrow molecular weight distribution (Mw/Mn ≤ 1.38), was synthesized via the site transformation strategy. First, a PMBTFVB linear precursor was prepared by thermal step-growth cycloaddition polymerization of MBTFVB trifluorovinyl monomer. After the end functionalization of the linear precursor with alkyne, Glaser coupling reaction was performed to produce c-PMBTFVB cyclic homopolymer. The pendant methyls on PFCB aryl ether-based backbone were then converted to Br-containing ATRP initiating groups by a mono-bromination reaction with N-bromosuccinimide (NBS) and benzoyl peroxide (BPO) to give c-PMBTFVB-Br cyclic macroinitiator without affecting the main chain, where the density of ATRP initiation groups could be tuned from 33% to 58% by varying the feeding ratio of NBS to the pendant methyl. Subsequently, c-PMBTFVB-g-PMAA sun-shaped amphiphilic copolymers with hydrophilic PMAA side chains were synthesized by ATRP of tert-butyl methacrylate (tBMA) initiated by c-PMBTFVB-Br, followed by the selective hydrolysis of hydrophobic PtBMA segment into hydrophilic PMAA segment using CF3COOH. The obtained c-PMBTFVB cyclic homopolymer and its precursor were well characterized by GPC, NMR, and DSC and all the observations indicated a high efficiency of the intra-macromolecular cyclization via Glaser coupling reaction. The critical micelle concentrations of the obtained amphiphilic copolymers were determined by fluorescence probe technique and the morphologies of the formed micelles were investigated by TEM. This journal is
A novel fluorine-containing graft copolymer bearing perfluorocyclobutyl aryl ether-based backbone and poly(methyl methacrylate) side chains
Liu, Hao,Li, Yongjun,Zhang, Sen,Yang, Dong,Hu, Jianhua,Huang, Xiaoyu
, p. 11 - 22 (2011)
A series of novel graft copolymers consisting of perfluorocyclobutyl aryl ether-based backbone and poly(methyl methacrylate) side chains were synthesized by the combination of thermal [2π + 2π] step-growth cycloaddition polymerization of aryl bistrifluorovinyl ether monomer and atom transfer radical polymerization (ATRP) of methyl methacrylate. A new aryl bistrifluorovinyl ether monomer, 2-methyl-1,4-bistrifluorovinyloxybenzene, was first synthesized in two steps from commercially available reagents, and this monomer was homopolymerized in diphenyl ether to provide the corresponding perfluorocyclobutyl aryl ether-based homopolymer with methoxyl end groups. The fluoropolymer was then converted to ATRP macroinitiator by the monobromination of the pendant methyls with N-bromosuccinimide and benzoyl peroxide. The grafting-from strategy was finally used to obtain the novel poly(2-methyl-1,4- bistrifluorovinyloxybenzene)-g-poly(methyl methacrylate) graft copolymers with relatively narrow molecular weight distributions (Mw/Mn ≤ 1.46) via ATRP of methyl methacrylate at 50 °C in anisole initiated by the Br-containing macroinitiator using CuBr/dHbpy as catalytic system. These fluorine-containing graft copolymers can dissolve in most organic solvents. This is the first example of the graft copolymer possessing perfluorocyclobutyl aryl ether-based backbone. Copyright
Popok et al.
, p. 2377,2380 (1979)
Synthesis method of tetrafluoropropyl trifluoroethylene ether
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Paragraph 0044-0047, (2020/05/01)
The invention relates to a preparation method of tetrafluoropropyl trifluoroethylene ether. The preparation method comprises the following main steps: in an alkaline environment, under the condition of heating, carrying out substitution and elimination on tetrafluoropropanol and 1,2-dibromo-1,1,2-trifluoroethane to obtain the tetrafluoropropyl trifluoroethylene ether. Compared with the existing reaction, the method provided by the invention has the advantages of simple reaction type, mild reaction conditions, strong operability, no use of organic solvents, environmental protection, fast reaction rate and high product yield, overcomes the difficulty of using metallic sodium and organic solvents in the prior art, reduces the reaction risk, and is suitable for industrial production.
