Design And Synthesis Of Organic Conjugate Small Molecules Centered On Anthracene And Study On Their Optical Properties

In recent years,attention has been focused on low molecular weight organic materials.Due to the wide range of the source,simple structure and simple purification means,it is widely used in memory storage device,organic light emitting-diode(OLED),organic solar cell and chemical sensor.As anthracene has different electronic structure with other ordinary aromatic ring and a large conjugate system,who has high fluorescence and high thermal stability and its 2,6,9,10 can be connected to different functional groups,our research group has been committed to the study of anthracene as the center of organic optoelectronic materials.This article focuses on the central anthracene design of seven different alkyl chain lengths with synthetic(C1-C7)9,10-(dialkylaminostyryl)anthracene derivatives(9,10-DSA)and 4-(phenanthrene and anthracene –aniline(PTPAN)and 4-(anthracene-9-phenyloxadiazole)aniline(OTPAN)and optical properties,the following major elements are studied:1.We obtained a series of 9,10-distyrylanthracene derivatives(9,10-DSA)by bonding the alkyl chains(C1-C7)of different lengths to the 9,10-position of anthracene by double bond.It was found that this series of derivatives resulted in a difference in their optical properties due to differences in the length of the alkyl chains,In solid state,by applying different forces(shear or compressive stress,heat after reaction,re-cutting or re-rolling,fumigation),the inventors of the series of compounds can reverse the relationship between these phenomena and the apparent strength of displacement and the strength of the alkyl chain length.This also demonstrates that we synthesized derivatives of the fluorescent color(PFC)function with pressure.2.We designed and synthesized two molecules,PTPAN and OTPAN,of DAD structure.After testing,it was found that both compounds had solvated effect.On the whole,the maximum fluorescence emission wavelength was gradually red with the increase of solvent polarity(red shift of 95 nm,74 nm)and the peak shape gradually widened.Acetonitrile and n-hexane were 0.220,0.251,0.732,and 0.761,respectively.The polarity of the solvent and the PTPAN OTPAN two substances and the fluorescence quantum efficiency decreased in the other solvents.From the data of thermal and electrochemical stability,PTPAN is a very promising deeply blue fluorescence device.