Anthracene-Centered Cruciforms:Synthesis,Enhanced Two-photon Absorptions,and Piezallochr-Omic Behaviour

In this thesis,a series of new anthracene center cross conjugated molecules were synthesized with the intermediates of 2.6-dimethyl-9.10-dibromoanthracene.which having the separated frontier molecular orbital.strong two-photon absorption cross section.aggregation-induced enhanced fluorescence emission.a complexing ability.Their LUMO and HOMO energy levels occurred a significant and independent changes due to the complexation of metal ions.This is the effective regulation of the molecular optical band gap and can also be used for single-and two-photon metal ions fluorescence sensing in the organic medium.In this work,we also studied the nature of the solid state of the homologues of the compound F.It was found that the series of homologues had the obvious piezallo-chromic behavior.This discoloration is due to the destruction of the crystal structure from crystalline into amorphous by grinding.The heat or organic solvents fumigation will be restored to its original state.which indicates that the piezallochromic behavior of the series of compounds was reversible.This subject not only to expand the type and application scope of the cross emitters,and the development of a class of new valuable to own intellectual property rights.including the metal ions in single/two-photon fluorescence sensing in organic media.They are the useful materials which is required by the two-photon fluorescence microscopy including two-photon fluorescence sensing.two-photon fluorescence labeling and photodynamic diagnosis and treatment.So far this series of compounds is the only conjugated organic molecular system with these characteristics.but also for the development of many other new and unique nature of the photoelectric materials.full of novelty and innovation.having important scientific significance and research value.The same time,in the subject the synthesized compounds will also be a good application in the material deformation detection,optical sensors,security paper,optoelectronic devices and data storage.