117606-92-5Relevant articles and documents
Synthesis and thermotropic properties of novel double-chained quaternary ammonium chlorides with symmetric and asymmetric hydrocarbon chain length
Ding, Zhaoyun,Hao, Aiyou
, p. 127 - 131 (2009)
A series of novel double-chained quaternary ammonium chlorides with symmetrical and asymmetrical hydrocarbon chain length R1-O-CH2-CH(OH)-CH2-N+(CH3)2-R2·Cl- (R1, R2: C12H25, C14H29, C16H33) have been synthesized by the reaction of 1-O-alkyl glycidyl ether with N,N-dimethylalkylamine and N,N-dimethylalkylamine hydrochloride. Their chemical structures have been characterized through FT-IR, 1H NMR, MS and elementary analysis. Their thermotropic properties have been examined by differential scanning calorimetry (DSC), polarizing light microscopy (PLM) and X-ray diffraction (XRD). It has been found that the compounds with longer hydrocarbon chain length and being higher asymmetry in hydrocarbon chain length exhibit lower melting point (Tm), isotropization temperature (Ti) and narrower mesophase temperature range. However, the hydrocarbon chain length and the symmetry in the hydrocarbon chain length have little influence on the type of liquid crystals. All compounds form cholesteric liquid crystal.
Physicochemical properties of novel phosphobetaine zwitterionic surfactants and mixed systems with an anionic surfactant
Nong, Lanping,Xiao, Chengliang,Zhong, Zhensheng
, p. 433 - 438 (2011)
A series of novel zwitterionic phosphobetaine (PPBT) surfactants were synthesized using long chain fatty alcohol, epichlorohydrin, dimethylamine and sodium dihydrogen phosphate as raw materials. The physicochemical properties of the phosphobetaine surfactants such as isoelectric point, foaming, surface tension, critical micelle concentration (CMC) and Krafft point were measured. Low CMC and surface tension values indicated the surface activities of the phosphobetaine surfactants were quite excellent. The CMC and surface tension values of PPBT/SDS mixed systems were determined. It was found both of CMC and surface tension values decreased compared with single surfactant system because of the association between dodecyl sulfate anions and cationic groups in phosphobetaine by electrostatic attraction. AOCS 2011.
Synthesis, Surface and Antimicrobial Activities of Novel Cationic Gemini Surfactants
Ding, Zhaoyun,Fang, Shimin
, p. 1051 - 1057 (2015)
A series of novel cationic gemini surfactants [C n H2n+1-O-CH2-CH(OH)-CH2-N+(CH3)2-(CH2)2]2·2Br- [3a (n = 12), 3b (n = 14) and 3c (n = 16)] having a 2-hydroxy-1,3-oxypropylene group [-CH2-CH(OH)-CH2-O-] in the hydrophobic chain have been synthesized and characterized. Their water solubility, surface activity, foaming properties, and antibacterial activity have been examined. The critical micelle concentration (CMC) values of the novel cationic gemini surfactants are one to two orders of magnitude smaller than those of the corresponding monomeric surfactants. Furthermore, the novel cationic gemini surfactants have better water solubility and surface activity than the comparable [C n H2n+1-N+(CH3)2-(CH2)2]2·2Br- (n-4-n) geminis. The novel cationic gemini surfactants 3a and 3b also exhibit good foaming properties and show good antibacterial and antifungal activities.
Synthesis of natural 1- O -alkylglycerols: A study on the chemoselective opening of the epoxide ring by onium quaternary salts (N and P) and ionic liquids
Nascimento, Thiana Santiago,Braga, Esther Faria,Casaes Gomes, Giselle Cristina,Batista, William Rom?o,Mazzei Albert, André Luís,Capella Lopes, Rosangela Sabbatini,Lopes, Claudio Cerqueira
, p. 1050 - 1054 (2020/01/23)
A chemoselective route for the synthesis of 1-O-alkylglycerols chimyl (1), batyl (2), and selachyl (3) is reported. These compounds can be naturally isolated from shark liver oil and the skin of animals such as stingrays and chimeras and exhibit potential anti-fouling activity. The synthetic approach developed in this work included two distinct methods of preparation. The first was based on solvent-free reactions catalyzed by onium quaternary salts (N and P) and ionic liquids; the second methodology was based on a series of one-pot reactions.
