Construction And Analysis Of Hydrophobic Interface Cage In Microemulsion

The pool in the microemulsion is widely used,and can perform two-phase reaction,liquid extraction,biomolecule stabilization,and synthesis of soft template nanomaterials.Some water molecules in the pool in the microemulsion may penetrate into the hydrophobic tail of the surfactant,thereby forming an interface hydrophobic region,which is an indispensable supplementary part in the pool.However,due to the small area of the interface hydrophobic region,there is little research on the application of the hydrophobic interface region in the microemulsion.Therefore,it is of great significance to enlarge the area of the hydrophobic interface region in the microemulsion.The specific research contents are as follows:(1)With propeller-shaped tetrastyrene(TPE)group as the core,one end is covalently connected to two octylchains(di-C8),and the other end is connected to the sulfonate ion head(SS)through a methoxybutyl spacer Covalently linked to prepare a two-tailed anionic surfactant molecule(TPE-di-C8SS).Due to the steric hindrance between rigid TPE groups,TPE-di-C8SS can form a three-component w/o microemulsion of water/TPE-di-C8SS/isooctane in isooctane solution.At the same time,the self-assembly of propeller-like TPE groups at the water-oil interface can induce the formation of larger cavities between adjacent TPE-di-C8SS molecules,that is,hydrophobic interface cages.Compared with water/bis(2-ethylhexyl)succinate sodium sulfonate(AOT)/isooctane microemulsion with the same pool size and ionic head group,the TPE-di-C8SS microemulsion has a better effect on cationic dye Rodin in water The extraction efficiency of Ming B is about 67%higher,which fully shows the formation and application potential of the hydrophobic interface cage(2)The use of peroxalate-hydrogen peroxide(TCPO-H2O2)chemiluminescence at the microemulsion water-oil interface further verified the utility of the hydrophobic interface cage.Using water/AOT/isooctane microemulsion as the reference model and the cationic dye rhodamine B as the chemiluminescence energy resonance transfer(CRET)receptor,chemiluminescence occurs at the water-oil interface using H2O2 in the pool and TCPO in the oil phase Transferred to Rhodamine B in the pool,the CRET efficiency after optimization of the conditions was 73.73%.Under the same conditions,with TPE-di-C8SS itself as the CRET receptor,the CRET efficiency of TCPO-H2O2 in water/TPE-di-C8SS/isooctane microemulsion was increased to 95.76%.The difference in CRET efficiency shows that when the pool size and H2O2 concentration are the same,a hydrophobic interface cage with a larger cavity can provide a larger contact interface and increase the local concentration of TCPO at the interface,thereby sensitizing TCPO-H2O2 chemiluminescence improve CRET efficiency.