111-56-8Relevant articles and documents
Adsorption of Metal Ions to Surface-Template Resins Prepared with Amphiphilic Styrene Monomers Bearing Amino Carboxylic Acid
Koide, Yoshifumi,Tsujimoto, Keigo,Shosenji, Hideto,Maeda, Mizuo,Takagi, Makoto
, p. 789 - 796 (1998)
Monomer-type functional surfactants, 2-(p-vinylbenzylamino)alkanoic acid (RnAc) and N,N-dialkyl derivatives (RRnNAc), have been used as both a ligand and an emulsifier for the preparation of surface-template resins. The surfactants adsorbed at the toluene-water interface and emulsified divinylbenzene-styrene in a Cu2+ or Zn2+ solution. Emulsion polymerization using a K2S2O8 initiator (80 °C) or by irradiation with γ-rays gave fine particles of 200-800 nm in diameter. Metal-imprinted resins prepared with RnNAc and RRnNAc showed a high adsorptive capacity for the metal ion (surface-template effect). Cu-imprinted resins prepared with R8NAc were 2.69-times as effective for Cu2+ in competitive sorption from a Cu2+-Zn2+ mixture and Zn-imprinted resins were 1.84-times as effective for Zn2+, compared with unimprinted resins. Because of the great emulsifying power, metal-imprinted resins prepared with R8NAc showed the most metal-selective adsorption and the largest capacity among resins prepared with RnNAc and RRnNAc.
Synthesis and Surface-Active Properties of a Homologous Series of Star-Like Triple-Chain Anionic Surfactants Derived from 1,1,1-Tris(hydroxymethyl)ethane
Li, Xu,Xing, Fenglan,Xu, Qun,Sun, Xiaolong,Wang, Yuping,Wang, Liyan,Wang, Pinglang
, p. 129 - 135 (2016/01/09)
A novel homologous series of trimeric anionic surfactants, 3C n TE3CNa (where n is a fatty acid chain length of 7, 10, or 12), with three hydrocarbon chains and three carboxylate heads connected via tri-etheric bonds were synthesized from long-chain α-bromo fatty acids and a triol, 1,1,1-tris(hydroxymethyl)ethane. The obtained trimeric carboxylic acids were esterified and purified by silica gel column chromatography, then hydrolyzed with dilute sodium hydroxide solution to form a series of trimeric carboxylate surfactant products. All prepared compounds were analyzed by IR, 1H NMR, and 13C NMR spectroscopy to confirm their chemical structures. Their surface-active properties were investigated. The critical micelle concentrations (cmc) of 3C n TE3CNa were in the range of 0.12-0.71 mmol/L, and the surface tensions at the cmc (γ cmc) were 29.3-34.8 mN/m.
Long-chain acyl-homoserine lactones from Methylobacterium mesophilicum: Synthesis and absolute configuration
Pomini, Armando M.,Cruz, Pedro L. R.,Gai, Claudia,Araujo, Welington L.,Marsaioli, Anita J.
supporting information; experimental part, p. 2125 - 2129 (2010/04/05)
The acyl-homoserine lactones (acyl-HSLs) produced by Methylobacterium mesophilicum isolated from orange trees infected with the citrus variegated chlorosis (CVC) disease have been studied, revealing the occurrence of six long-chain acyl-HSLs, i.e., the saturated homologues (S)-N-dodecanoyl (1) and (S)-N-tetradecanoyl-HSL (5), the uncommon odd-chain N-tridecanoyl-HSL (3), the new natural product (S)-N-(2E)-dodecenoyl-HSL (2), and the rare unsaturated homologues (S)-N-(7Z)-tetradecenoyl (4) and (S)-N-(2E,7Z)-tetradecadienyl-HSL (6). The absolute configurations of all HSLs were determined as 3S. Compounds 2 and 6 were synthesized for the first time. Antimicrobial assays with synthetic acyl-HSLs against Gram-positive bacterial endophytes co-isolated with M. mesophilicum from CVC-infected trees revealed low or no antibacterial activity.
