112-18-5Relevant articles and documents
Synthesis and properties of biodegradable cationic gemini surfactants with diester and flexible spacers
Xu, Dongqing,Ni, Xiaoyue,Zhang, Congyu,Mao, Jie,Song, Changchun
, p. 542 - 548 (2017)
A series of cationic gemini surfactants with diester and flexible spacers, namely C12-PG-C12, C14-PG-C14 and C16-PG-C16, were synthesized, purified and characterized. The surface properties and aggregation behavior of the gemini surfactants were investigated by surface tension, electrical conductivity, fluorescence and Krafft point. These gemini surfactants possess higher surface activity than the traditional monomeric surfactants. The thermodynamic parameters exhibited that the micellization was a spontaneous and exothermic process in environment. The micellization process became less favorable with the decrease of alkyl chain length and the increase of temperature. Steady-state fluorescence measurements revealed that the micropolarity and aggregation number of micelles decreased with the increase of hydrocarbon chain length. The Krafft points were taken as ?0?°C, which indicated the synthesized gemini surfactants had good water solubility. The biodegradability of the gemini surfactants were evaluated in river water using Closed Bottle tested and showed their high biodegradation ratio in the open environment due to the diester bond inserting in the flexible spacer of surfactant molecules.
Chemical synthesis of silver nanowires using N,N-dimethyldodecylamine oxide
Matsune, Hideki,Kuramitsu, Yudai,Takenaka, Sakae,Kishida, Masahiro
, p. 717 - 719 (2010)
This paper describes a new approach for the synthesis of uniform silver nanowires (AgNWs) using zwitterionic amphiphile, N,N-dimethyldodecylamine oxide (DDAO). Heating of AgCl and DDAO in the presence of silver nanoparticles at 135°C for 3 h produces longer AgNWs. The DDAO serves as a source of both a reducing and capping agent in the process.
Baiker,Richarz
, p. 1937 (1977)
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Stepanenko et al.
, (1968)
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PROCESS FOR CONVERTING AMIDE TO AMINE
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Page/Page column 12-22, (2021/06/11)
Provided is a process for converting an amide into an amine comprising hydrogenation of the amide at a temperature not higher than 130°C and a hydrogen pressure not higher than 50 bar in the presence of a supported heterogeneous catalyst preparable by a method comprising depositing vanadium on a supported noble metal catalyst by impregnation.
Efficient hydrogenation of aliphatic amides to amines over vanadium-modified rhodium supported catalyst
Hernandez, Willinton Y.,Kusema, Bright T.,Pennetier, Alex,Streiff, Stéphane
, (2021/08/19)
This work presents a highly efficient catalytic hydrogenation system developed for the selective transformation of tertiary N,N-dimethyldodecanamide and secondary azepan-2-one amides to the corresponding amines. Industrial hydrogenation catalysts Pd/Al2O3, Pt/Al2O3 and Rh/Al2O3 were modified with vanadium (V) or molybdenum (Mo) species as oxophilic centres. The modified catalysts were prepared by deposition of V or Mo precursor on supported catalysts via impregnation method. The catalysts were characterized by ICP-OES, XRD, XPS, H2-TPR, FTIR, CO-chemisorption, TEM, SEM-EDX and TGA. Modified Rh-V/Al2O3 catalyst displayed the best performance affording high yield and selectivity >95 % to the desired tertiary and secondary amines at moderate reaction conditions of T H2 0 sites and oxophilic Vδ+ sites in the bimetallic Rh-V/Al2O3 catalyst were determined to be beneficial for the selective dissociation of C[dbnd]O bond of the carboxamides into the desired amines.