Wang, Zhixia published the artcileThe synthesis of quaternary N-alkyl tropinium cationic surfactants and study on their properties: effect of temperature, hydrophobic chain length and anions, SDS of cas: 143-15-7, the publication is Journal of Molecular Structure (2022), 133732, database is CAplus.
Quaternary N-alkyl tropinium cationic surfactants (TILS) were synthesized and characterized. The effect of temperature, hydrophobic chain length and anions on their properties were studied. By changing the structure of anion, the krafft point was significantly reduced (from 313.15 K to <273.15 K) and wide temperature window was obtained. The critical micelle concentration (CMC) value of TILS based on elec. conductivity method is decreased ∼4-5 times by increasing hydrophobicity of anions. At lower temperature and longer hydrophobic chain, TILS had lower CMC value and better surface activity. The thermodn. properties of micellization Gibbs free energy ΔGmic, enthalpy ΔHmic and entropy TΔSmic of micelles were obtained by Mass action model. The micellization process of the TILS was spontaneous and more stable with the increase of anionic hydrophobicity. With the increase of hydrophobic side chain length, the driving force of surfactant micellization may be enthalpy driven at higher temperature and entropy driven at lower temperature The micro-environment of TILS solution with different concentrations was studied by UV spectrophotometry with curcumin as a probe and the change of micro-environment was used to determine the CMC of TILS. The CMC values were similar obtained by 2 methods.
Journal of Molecular Structure published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C12H20O6, SDS of cas: 143-15-7.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary