Spectroscopic Properties Of Fluorescent Dyes In Anionic Surfactant Self-assembly System

The research of self-assembly technology can be used to design and manufacture the effective structure of functional supramolecular components and materials.It is one of the major scientific research issues in the 21st century and has made outstanding contributions in various fields such as environment,life,medicine and food.The assembly formed by the aggregation of amphiphilic surfactants and fluorescent reagents provides a great contribution in the science of supramolecular materials.The micellar environment formed by the self-assembling material can increase drug solubility for emulsion,drug delivery and catalysis.The assembly of the fluorescent dye embedded can be used as a fluorescence sensor to sense trace metal ions in the microenvironment,and can help to detect environmental pollution and human trace ions.In addition,surfactants and oppositely charged substances can be assembled into vesicles,which can be used to wrap the drug and transport it to the desired location before releasing the drug,which can be used to simulate human cell membranes for the treatment of some diseases.To reduce the harm of drugs to the body.Pre-micelles,micelles,vesicles and bilayer membranes formed by the spontaneous aggregation of amphiphilic surfactants have become the focus of research,but pre-micelles are a stage before micelle formation and are rarely studied in China.Spectroscopic studies are a suitable tool for detecting the aggregation of fluorescent dyes and surfactants.Through a series of spectral test methods,the effects of fluorescent dyes on the critical micelle concentration?CMC?of anionic surfactants were studied,and the influence of metal ions on the assembly system was also applied to the sensing of heavy metal ions in the microenvironment.The anionic surfactant is combined with p-toluidine to form a vesicle mimetic drug.The following is the detailed research content:1?This paper first discusses the changes in spectral properties of dye neutral red when interacting with sodium dodecyl sulfate?SDSN?,sodium dodecylbenzene sulfonate?SDBS?or sodium dodecyl sulfate?SDS?,respectively.The change of the wavelength,shape and intensity of the spectrum is used to study the local solvent environment changes around the neutral red molecules in the micelles and pre-micelles.The binding ability of these surfactants to neutral red is also discussed.Then we discussed two types of dye acridine orange in neutral and acidic environment,and then studied the changes of spectral properties of acridine orange when interacting with SDSN,SDBS or SDS.The emphasis is placed on the presence of neutral red in a surfactant solution and the presence of acridine orange in two forms.2?In this paper,the effect of copper ion(Cu²⁺)on the spectral properties of neutral red in acidic environment is studied.Then,the interaction between neutral red and SDSN,SDBS or SDS with different concentrations in acidic environment is discussed,and different assemblies are formed.The influence of Cu²⁺on the assemblies is discussed.The concentration of neutral red and surfactant was determined,the concentration of Cu²⁺was changed,and the effects of Cu²⁺on pre-micelles and micelles were discussed by fluorescence and UV-visible spectra.This fine-tuning reaction allows us to develop fluorescent on/off fluorescent sensors,which can sense Cu²⁺in aqueous solution and contribute to the fluorescence sensor.3?In this paper,the interaction of p-toluidine with SDSN,SDBS or SDS was studied.The fluorescence spectra and fluorescence lifetime data showed that p-toluidine and SDBS could aggregate to form vesicles.Meanwhile,the effect of?-cyclodextrin on the assembled of vesicles was also discussed.