Fine-tuning the photophysical properties of thermally activated delayed fluorescent emitters using torsion angles: high performance sky-blue OLEDs
作者:Lisi Zhan、Yepeng Xiang、Zhanxiang Chen、Kailong Wu、Shaolong Gong、Guohua Xie、Chuluo Yang
DOI:10.1039/c9tc04804a
日期:——
(TADF) and aggregation-inducedemission (AIE) characteristics on account of the highly twisted D–A structure. Their photophysical and electroluminescent properties can be well regulated through this isomeric strategy. Owing to its proper torsion angles and high photoluminescence quantum yields (PLQYs), the 3,4′ACSO2 based device achieves a maximum externalquantumefficiency of 20.5% with sky blue emission
PROCESS FOR PREPARING POLYETHER ETHER KETONE MEMBRANE
申请人:Asahi Kasei Kogyo Kabushiki Kaisha
公开号:EP0796649A1
公开(公告)日:1997-09-24
The present invention is directed to a process for manufacturing a polyether ether ketone (PEEK) membrane which may be used for ultrafiltration or microfiltration at high temperatures.
In this process for manufacturing a non-sulfonated PEEK membrane which comprises dissolving PEEK in a solvent to obtain a membrane forming stock solution, forming the stock solution into a desired shape and bringing the formed stock solution in contact with a coagulating liquid capable of coagulating PEEK, the key features involve using concentrated sulfuric acid as the solvent, dissolving PEEK therein to prepare the stock solution and keeping the stock solution at 15 degrees C or lower until initiation of membrane formation.
Preparation process of fluorine subsituted aromatic compound
申请人:Mitsui Chemicals, Inc.
公开号:EP1013629A1
公开(公告)日:2000-06-28
A preparation process of a fluorine substituted aromatic compound comprising reacting an alkali metal or alkali earth metal salt of an aromatic compound having a hydroxy group with an organic fluorinating agent is disclosed. As a representative fluorinating agent, a bis-dialkylaminodifluoromethane compound, for example, 2,2'-difluoro-1,3-dimethylimidazolidine, is exemplified.
According to the process, an industrially useful fluorinated aromatic compound, for example, a fluorobenzene, a fluorine substituted benzophenone, a fluorine substituted diarylsulfone can be prepared with ease in economy without specific equipment.
Aromatic polymer, method for producing the same and uses thereof
申请人:Sumitomo Chemical Company, Limited
公开号:EP1348716A1
公开(公告)日:2003-10-01
There is provided a polymer electrolyte which shows excellent characteristics as proton conductive membrane of fuel cells and the like. This polymer electrolyte contains an aromatic polymer which is characterized by having a super strong acid group in a side chain.