Design And Synthesis Of Stilbenes And N-benzylidene Benzenamine Derivatives Being In The Specified Section Of UV Absorption Energy

Photoelectric material which occupies the important research significance among thenew materials arouses much attention of researchers. And the organic photoelectric materialsplay a more important role than the inorganic ones, because of the great superiority in manyaspects. The trans-4,4’-disubstituented stilbene derivatives and the substitutedN-benzylidenebenzenamine derivatives are of important research value for that they canconstitute some photoelectric materials of specific performance. In this paper, based on theUV absorption max wavelengths calculated by the reported equations, some oftrans-4,4’-disubstituented stilbene derivatives and substituted N-benzylidenebenzenaminederivatives were designed and synthesized. Their UV absorption max wavelengths weredetermined in ethanol, and the design rationality of the reported equations was compared eachother. Further an quantifying equation with three parameters was proposed to calculate theenergy of UV absorption max wavelengths of trans-4,4’-disubstituented stilbene, by whichthe energy of UV absorption max wavelengths of target compounds were calculated and theirmolecules were designed. In the meantime, the experimental UV absorption max wavelengthsdata of meta-substituted stilbenes that have been determined in preliminary work of our groupwere compared with the values calculated by three equations. The result shows that thereported two equations are basically available for the molecular design of the para-substitutedstilbene and the meta-substituted stilbene, while the correlation between the calculated valuesbased on the three-parameter equation of this paper and the experimental values is the best.The results of correlations between the calculated values and the experimental values ofsubstituted N-benzylidenebenzenamine derivatives indicate that the reported equations andthe excited-state substituent of meta-substituent(σ excc(m)) have good applicability for themolecular design of substituted N-benzylidenebenzenamine derivatives. The method of thispaper provides us a theoretical reference for the molecular design of optical materials of silbene compounds and N-benzylidenebenzenamine compounds.