- Design and surface/interfacial properties of asymmetric triazine carboxyl betaine surfactants
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The design, synthesis and interfacial behaviors of six asymmetric carboxyl betaine surfactants (BCm-n, m, n = 8, 10, 12, or 14, m ≠ n) derived from s-triazine, which were prepared from cyanuric chloride, aliphatic amines, N,N-dimethylpropane-1,3-diamine, followed by the reaction with sodium chloroacetate, are reported. The structures were confirmed by MS,1H NMR and FT-IR. Compared with symmetric surfactants (BCn-n, n = 8, 10, 12, or 14) we previously synthesized, the asymmetric series show superior surface activity. The γCMC of surfactants BC10-8, BC12-8, BC14-8 and BC12-10 is all below 30 mN/m. The minimum alkane carbon number of these ten surfactants is determined to be between 10 and 14. The interfacial behaviors between the alkanes and the solutions of triazine carboxyl betaine surfactants show that surfactants with a total carbon number in hydrophobic chains between 16 and 22 exhibit the ability to reduce the interfacial tension to an ultra-low value (10-3 mN/m). The surfactants with longer hydrocarbon chains display strong affinity to the alkanes with longer chains.
- Jing, Lishuai,Qiao, Weihong,Luo, Limei,Peng, Huan
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- Synthesis and properties of novel alkyl sulfonate gemini surfactants
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A series of novel dialkyl disulfonate gemini surfactants (2C n-SCT where n is the carbon number of the hydrophobic chain) were synthesized from cyanuric chloride, aliphatic amine and taurine. The chemical structures of the prepared compounds were confirmed by 1H NMR, 13C NMR, IR spectra, and ESI-MS. Their critical micelle concentrations (CMC) in the aqueous solutions at 25 °C were determined by surface tension and electrical conductivity methods. With the increasing length of the carbon chain, the values of their CMC initially decreased, and then increased with an alkyl chain length of 14. The surface tension measurements of 2Cn-SCT (except for n - 14) determined that there is a low CMC, a great efficiency in lowering the surface tension, and a strong adsorption at the air-water interface. In addition, adsorption and micellization behavior of 2Cn-SCT were estimated from pC20, the minimum average area per surfactant molecule (Amin), and standard free energy micellization and adsorption (ΔG°c and ΔG°ds). These properties are significantly influenced by the chain length n, and the adsorption is promoted more than the micellization. AOCS 2010.
- Li, Xin,Hu, Zhiyong,Zhu, Hailin,Zhao, Sufen,Cao, Duanlin
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- Efficient cell transfection with melamine-based gemini surfactants
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Gemini surfactants consisting of two melamine scaffolds connected by a n-hexyl linker and functionalized with a 1-propylammonium polar head and a lipophilic chain having variable carbon length (from C8 to C16) were synthesized. These were then used successfully for the transfection of A549, U87 MG, and Bristol 8 cell lines with maxGFP expressing plasmid. The transfection protocol was optimized appropriately (confluence, reagent/pcDNA ratio, compaction time, and transfection time) for each cell line. Under optimized conditions, the C12 and C14 melamine gemini surfactants showed little toxicity and remarkable transfection efficiency, superior to the gold-standard Lipofectamine 2000. These reagents were also able to efficiently transfect primary DRG neurons, which are notoriously difficult to transfect. The presence of serum completely inhibited the transfection capacity of these reagents. Owing to their ready availability, straightforward synthesis, high chemical stability (even in solution), ease of use (no formulation is required), improved transfection ability, and low toxicity, melamine-based gemini surfactants are very promising reagents for cellular DNA transfection.
- Perrone, Serena,Usai, Michele,Lazzari, Paolo,Tucker, Steven J.,Wallace, Heather M.,Zanda, Matteo
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- A Novel Alkyl Sulphobetaine Gemini Surfactant Based on S-triazine: Synthesis and Properties
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A series of alkyl sulphobetaine Gemini surfactants Cn-GSBS (n?=?8, 10, 12, 14, 16) was synthesized, using aliphatic amine, cyanuric chloride, ethylenediamine, N,N′-dimethyl-1,3-propyldiamine and sodium 2-chloroethane sulfonate as main raw materials. The chemical structures were confirmed by FT-IR, 1H NMR and elemental analysis. The Krafft points differ markedly with different carbon chain length, for C8-GSBS, C10-GSBS and C12-GSBS are considered to be below 0?°C and C14-GSBS, C16-GSBS are higher than 0?°C but lower than room temperature. Surface-active properties were studied by surface tension and electrical conductivity. Critical micelle concentrations were much lower than dodecyl sulphobetaine (BS-12) and decreased with increasing length of the carbon chain from 8 to 16, and can reach a minimum as low as 5?×?10?5?mol?L?1 for C16-GSBS. Effects of carbon chain length and concentration of Cn-GSBS on crude oil emulsion stability were also investigated and discussed.
- Niu, Ruixia,Wang, Chao,Sun, Zhigang,Long, Biao,Song, Hua,Ren, Weidong,Wang, Daqiang,He, Junyao
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- Sustainable triazine-derived quaternary ammonium salts as antimicrobial agents
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The first examples of highly efficient antimicrobial triazine-derived bis imidazolium quaternary ammonium salts (TQAS) are reported. TQAS have been prepared with an easy, atom efficient, economically sustainable strategy and tested as antimicrobial agents
- Morandini, Andrea,Spadati, Emanuele,Leonetti, Benedetta,Sole, Roberto,Gatto, Vanessa,Rizzolio, Flavio,Beghetto, Valentina
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- 1,3,5-triazine derivative and application thereof in pigment
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The invention relates to a 1,3,5-triazine derivative and application thereof in a pigment. The 1,3,5-triazine derivative is a compound of formula I as shown in the specification. The 1,3,5-triazine derivative provided by the invention is applied as an organic pigment dispersant. By adopting the 1,3,5-triazine derivative, not only are the dispersibility and the flowability of an organic pigment improved, but also the coloring property of the organic pigment is improved. In the formula, R is straight-chain or branched-chain hydrocarbyl of C1-C18; R1-R6 are respectively independently selected from one of straight-chain or branched-chain alkyl of C1-C24; a is an integer of 1-20; b is an integer of 1-20; X is halogen.
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Paragraph 0019-0022
(2018/06/04)
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- A reagent for analysis of blood and preparation method therof
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The present invention relates to a compound for analysis of blood capable of replacing existing reagents for analysis of blood, and a preparation method thereof. A compound of the present invention can rapidly dissolve blood cells, thereby being applicable as a composition for dissolving blood cells. Also, the compound can be applied as a composition for analysis of blood, thereby being capable of replacing existing reagents (compositions) for analysis of blood and improving analysis efficiency. To this end, the compound is represented by chemical formula 1c or 1d.COPYRIGHT KIPO 2018
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Paragraph 0074-0079
(2018/05/03)
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- Role of complementary H-bonding interaction of a cyanurate in the self-assembly and gelation of melamine linked tri(p-phenyleneethynylene)s
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Melamine-functionalized tri(p-phenyleneethynylene) 1 self-assembles to form opaque and weak gels in aliphatic solvents which turned transparent and stable upon addition of a cyanurate, affording supramolecular nanostructures with distinct physical propert
- Mahesh, Sankarapillai,Thirumalai, Rajasekaran,Yagai, Shiki,Kitamura, Akihide,Ajayaghosh, Ayyappanpillai
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supporting information; scheme or table
p. 5984 - 5986
(2010/11/03)
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