16156-50-6Relevant articles and documents
Synthesis and surface activity study of novel branched zwitterionic heterogemini fluorosurfactants with CF3CF2CF2C(CF3)2 group
Lin, Chao,Pan, Renming,Xing, Ping,Jiang, Biao
, p. 35 - 41 (2018)
In this work, we report a facile synthesis of four fluorinated zwitterionic heterogemini surfactants bearing branched CF3CF2CF2C(CF3)2- group with perfluoro-2-methyl-2-pentene as starting material. The surface activities of as-prepared four surfactants were found to be better than that of sodium perfluorooctanoate. Meanwhile, our fluorinated surfactants with double hydrophobic chains showed much better surface activities than the monomeric fluorinated surfactant. With the introduction of an alkyl chain, the CMC could be reduced more than 200 times to 6.30 × 10?5 mol/L, together with a surface tension of 18.66 mN/m. When a new fluorinated chain was introduced in the molecular structure, the CMC could be as low as 1.74 × 10?6 mol/L, along with a surface tension of 18.42 mN/m. When the alkyl chain length is 7, the surfactant has the same ability with the double fluorinated chain one to reduce the surface tension.
Peroxopolyoxometalate-based room temperature ionic liquid as a self-separation catalyst for epoxidation of olefins
Li, Huan,Hou, Zhenshan,Qiao, Yunxiang,Feng, Bo,Hu, Yu,Wang, Xiangrui,Zhao, Xiuge
, p. 470 - 475 (2010)
A new peroxopolyoxometalate-based room temperature ionic liquid (POM-RTIL) has been synthesized and used as catalyst for efficient epoxidation of various olefins. The RTIL catalyst was found to be well dissolved in the solvent (ethyl acetate) during the reaction, while it can self-separate from the reaction media at room temperature after the reaction completed, which made the recovery and reuse of the IL catalyst convenient. The POM-RTIL catalyst can be recycled for five times without significant loss of activity.
Efficient synthesis of organic thioacetates in water
Olivito,Costanzo,Di Gioia,Nardi,Oliverio,Procopio
, p. 7753 - 7759 (2018)
Thioacetates as precursors of thiols are interesting starting points for synthesizing other organosulfur compounds. Herein, we propose a simple, efficient and fast method to obtain organic thioacetates using water as a solvent. Taking into account the great attention that has been paid toward environmentally friendly synthetic procedures in the past decades, we prove the role and the strength of the thioacetate anion as a nucleophile for nucleophilic displacement reactions in an aqueous medium. The reactions were carried out under pH control, to prevent the decomposition of the mesylate starting materials, using potassium carbonate as a safe and mild base. A simple work up allows products to be obtained with excellent yield and acceptable purity.
A preparing method of diethylamino hydroxybenzoyl hexylbenzoate
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Paragraph 0077-0079, (2020/03/28)
The present invention relates to a method for the preparation of diethylamino hydroxybenzoyl hexyl benzoate. Specifically, the present invention relates to a method for preparing diethylamino hydroxybenzoyl hexyl benzoate which is easy to manufacture and commercially available in mass production, and diethylamino hydroxybenzoyl hexyl benzoate crystalline particles prepared thereby. According to the present invention, diethylamino hydroxybenzoyl hexyl benzoate crystalline particles having excellent UV blocking effect can be obtained in a stable and high yield.COPYRIGHT KIPO 2020
