含有亚胺基芴类衍生物的合成及光物理过程

通过2,7-二溴芴酮与相应的苯胺衍生物反应,合成了一系列新型的含有亚胺基的芴类衍生物:2,7-二溴-9-亚苯胺基芴(NBFA),2,7-二溴-9-亚(4-氯-苯胺)基芴(CNBFA),2,7-二溴-9-亚(4-甲基-苯胺)基芴(MN-BFA),其结构经氢核磁共振谱、红外光谱和质谱表征,并且采用紫外光谱法和荧光光谱法研究了这些化合物的光物理过程.

Synthesis and Photophysical Processes of the Fluorene Derivatives Containing Imino Groups

The study on organic electroluminescence devices(OELDs) have become one of the fascinating fields recently.Compared with inorganic electroluminescence devices,OELDs possess excellent features such as high efficiency,high brightness,rich color,wide visual view,low energy consumption,fast response,low cost,low-voltage dri-ving matching integrate circuit,large-area full-color display,excellent mechanical properties and so on.As the foundation of OLEDs,organic electroluminescent(OEL) materials are one of the key factors influencing the device performance.Therefore,organic electroluminescent(OEL) materials are also one of chemists' hot subjects in this field.In this promising field,many chemists are devoting themselves to investigating the synthesis techniques and photophysical behaviors of new and excellent electroluminescent materials.At present,OELDs have made great progress and developed for practicality and commodity,but their properties still be in the need of improvement in brightness,efficiency,lifetime,etc.The fluorene derivatives containing imino groups,N-(2,7-dibromo-9-fluorenylidene)aniline(NBFA),4-methyl-N-(2,7-dibromo-9-fluorenylidene)aniline(MNBFA) and 4chloro-N-(2,7-dibromo-9-fluorenylidene)aniline(CNBFA) as novel organic electroluminescent compounds were synthesized by the reaction of 2,7-dibromofluorenone and corresponding aniline derivatives.The structures of the compounds were characterized by 1H NMR,IR and MS.The photophysical processes of the compounds were carefully investigated by UV-Vis absorption and fluorescence emission spectra.The results show that the emission spectra exhibited obvious solvent effects and functional group effects.The emitting intensities were quenched by diphenylketone(DPKT),a quencher of electron acceptor,and gradually decreased with the increase of quencher.The quenching effect followed the Stern-Volmer equation well.The imino derivatives(NBFA,CNBFA,MNBFA) of 2,7-dibromofluorenone display not only a potential candidate as materials for organic electroluminescent devices,but also an intermediate for luminescent materials.