Molecular Uniting Set Identified Characteristic(MUSIC)of Organic Optoelectronic Material

Researchers investigated the organic optoelectronic materials and facilitated their development in organic light-emitting diodes(OLEDs),chemo-and biosensors,organic solar cells,data storage,and anticounterfeiting devices.Atoms make up molecules through chemical bonds,and molecular aggregates are formed through weak intermolecular interactions.The opto-electronic performance of these materials depends on not only the properties of the well-designed molecules with specific function groups,but also their aggregate states.The molecular aggregates in the form of nanoparticles can be applied in biological imaging,and films can be applied to photovoltaic and photodeformable devices,in which,the alignment of optoelectronic molecules can be either an ordered crystalline or an amorphous state.Generally,the crystalline materials could be deeply investigated by single crystal/powder X-ray diffraction analysis,which could provide the accurate information about molecular conformations,interactions and packing characteristics.It afforded a convenient way to investigate the possible relationship between molecular aggregates and opto-electronic properties.Among various opto-electronic materials,organic room temperature phosphorescence(RTP)materials exhibit the extremely sensitive luminescence property to molecular aggregates,even the dynamic properties can be detected by the tiny change of molecular aggregates.Thus,we selected the organic RTP emission as the output information of molecular aggregates,and afforded typical examples to find the possible relation between RTP effect and molecular packing.Accordingly,molecular packing can be adjusted by the external force as light,mechanical force,temperature,electric field,and so on,as well as the molecular structures as the building blocks,and the systematic investigation in the dynamic and static aggregation structures is of great value to the design of various optoelectronic materials.This review discusses the relationship among molecular structures,aggregation behaviors and corresponding optoelectronic properties by a comprehensive summary of recent research in our group,and the concept of molecular uniting set identified characteristic(MUSIC)is afforded.