Synthesis Of Fluorescent Compounds Containing Furanone Derivatives And Preparation Of Fluorescent Hydrogels

Typical organic fluorescent compounds have excellent spectral properties and abundant functional modification sites,which can be optimized into fluorescent materials for various fields.In recent years,researchers have been committed to the exploration and research of the design,preparation and performance of new organic fluorescent compounds.A variety of new organic fluorescent compounds have been developed,whose fluorescence emission color is from blue to red,and even reach the near-infrared region.However,when constructing organic fluorescent compounds with long wavelength absorption and emission,researchers often consider the expansion ofπ-conjugation or the introduction of electron donor/acceptor strategies.However,these strategies usually require complicated synthesis processes and difficulties in subsequent purification,and the resulting molecules have a large volume and complex structure.Therefore,in this study,a series of fluorescent compounds 1-9 containing furan derivatives groups were synthesized by rational structural design based on the platform of organic small molecules,and the effects of different acceptor units on photophysical properties were studied.With the change of the acceptor unit,high fluorescence brightness and red-shift absorption/emission wavelength were achieved.The fluorescence emission is redshifted from blue(λ_em,max=451 nm)to deep red/near infrared region(λ_em,max=783 nm),covering almost the whole visible region.Among them,the fluorescence quantum efficiency of compound 5 with high-solid emission is46.94%.In addition,in order to study the fluorescence properties of this series of fluorescent compounds in hydrogel materials,compound 1-9 hydrogel materials were prepared,and the changes in fluorescence color and fluorescence brightness at different concentrations were studied.With the increase of compound concentration,the fluorescence intensity of compound 1-9 hydrogels increased gradually.The fluorescence emission of compound 1-9 hydrogels and the fluorescence color are also different,from short wavelength blue,light cyan and green to long wavelength yellow,orange and red,which makes them have a wide range of absorption/emission wavelength and fluorescence brightness,providing a new method for the construction of multifunctional fluorescent materials.