Circularly Polarized Luminescence From The Aggregation-Dinduced Supramolecular System

Circularly polarized fluorescence?CPL?is the difference between left-handed circularly polarized fluorescence and right-handed circularly polarized fluorescence.The excited chemical structures of organic materials can be probed through circularly polarized luminescence,while these ground states can be availed by virtue of circular dichroism.CPL-active materials have extensive applications,including three-dimensional information displays,data storage,quantum communications,chemical sensors,biological detectors,Tomography scanner based on ellipsometer and spintronics.It is a formidable challenge for developing smart CPL-acrive materials in the field of electronics in the 21st century.At present,the small g_lum values is a critical issue that limits these materials applications in the photoelectric devices.As excepted,the novel strategy should be constructed to enhance the g_lumum values.The innovations and concrete contents are as following below:?1?First chapter:The self-assembly assembles were prepared through the hydrogen bond electrical interaction between the achiral phenylstyrene and chiral template chiral phenylalanine.Interestingly,we found that the prepared macrocrystals were beneficial to enhancing the g_lum values,which was up to 10^-1.These molecules possesses the intramolecular charge properties,which allowed the electric dipole moment amplification and prohibited the magnetic dipole moment.As a result,the polarized emission was greatly enhanced.?2?Second chapter:The three-dimensional structure of carborane derivatives and their hydrophobic properties were adverse to constructing the supramolecular self-assembly system.As indicated above,we agreed that the hierarchical ordered self-assembly assembles are available for chirality signal transfer.Therefore,helical microtubes were prepared via the chiral template of phenylalanine with o-carborane-based triazine derivatives.As a consequence,the magnetic dipole was improved and the circular polarization value was greatly enhanced with the maximum value of0.01.?3?Third chapter:The assembles was according to the above similar procedures.the external stimuli,waters,can modulate the morphology to regulate the polirazed emission.The supramolecular morphology includes the macrocrystals,helical fibers,and chiral gels..Among them,the circular polarization value of the microcrystalline structure reaches 0.16,which provides useful reference ideas and practical experience for the development and expansion of electro-polarized materials.