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《Chemical Journal of Chinese Universities》 2014-03
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Effects on Fluorescence Color Purity of Phenanthroimidazole Derivatives from N1 Substituted Group

WANG Zhiming;SONG Xiaohui;LI Hui;FENG Ying;LU Ping;School of Petrochemical Engineering,Shenyang University of Technology;State Key Laboratory of Supramolecular Structure and Materials,Jilin University;  
Phenanthro[9,10-d]imidazole(PI),as a new class building block for organic blue fluorescence emitter,has attracted more and more attention due to its potential application of highly efficient non-doped blue materials and white or phosphorescent host,but it is a pity with a little reports in its structure-property relationship,such as color purity.Owing to the substituted group at C2-position participating in the formation of the frontier molecular orbitals in the obtained materials,tremendous attentions is cost to tune the stuctures at this position,another key factor to their emitting light color from N1 position was ignored.In this paper,1,2-diphenyl-1H-phenanthro[9,10-d]imidazole(PPI) was chosen as a model compound for PI-based compound,and its two kinds of derivatives were prepared by tuning the substituted group in phenyl attached N1-position.Their basic chemical structures were confirmed by NMR spectra.Comparing with the fine fluorescence spectra in single molecular of PPI and its derivatives,the shift regulation of the various level emission peaks and their proportion to PI unit was carefully disclosed by changing the substituted position and structure.Here,R4-substituted position in phenyl attached N1 played more important role in substituent effect than others.When the electron-donating substituent or weak electron-withdrawing group was introduced to this position,the proportion of low-energy level emission decrease in fine fluorescence spectra of PI block,and the color purity was improved obviously.When the stronger electron-withdrawing group was inserted,the proportion of low-energy level emission increased in fine fluorescence spectra and the peak width was expended.All of these results could provide some basal theory for design of various blue emitters based on PI block.
【Fund】: 国家自然科学基金(批准号:51203091);; 辽宁省博士启动基金(批准号:20131084)资助~~
【CateGory Index】: O626.23
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【Co-citations】
Chinese Journal Full-text Database 5 Hits
1 DING Gui-ying;CHANG Xi;WANG Jin;JIANG Wen-long;OUYANG Xin-hua;Key Laboratory of Functional Materials Physics and Chemistry,Ministry of Education,Jilin Normal University;Ningbo Institute of Materials Technology Engineering.Chinese Academy of Sciences;;High efficiency nondoped blue OLEDs based on novel ambipolar blue emitting material TPABMI[J];Journal of Optoelectronics.Laser;2013-10
2 YANG Bing;MA YuGuang;State Key Laboratory of Supramolecular Structure and Materials, Jilin University;State Key Laboratory of Luminescent Materials and Devices; South China University of Technology;;Progress in next-generation organic electroluminescent materials:Material design beyond exciton statistics[J];Scientia Sinica(Chimica);2013-11
3 YAO Liang;YANG Bing;MA YuGuang;State Key Laboratory of Supramolecular Structure and Materials, Jilin University;State Key Laboratory of Luminescent Materials and Devices, South China University of Technology;;Progress in next-generation organic electroluminescent materials:material design beyond exciton statistics[J];中国科学:化学(英文版);2014-03
4 XU Hua-jie;LIU Zhao-di;SHENG Liang-quan;SONG Chong-fu;ZHANG Hong;HUANG De-qian;College of Chemistry and Chemical Engineering,Fuyang Normal College;;Advances in ion probes based on excited state intramolecular proton transfer[J];Chemical Research and Application;2014-02
5 WANG Zhi-ming;SONG Xiao-hui;FENG Ying;ZHANG Xiao-juan;MA Qi-peng;School of Petrochemical Engineering,Shenyang University of Technology;No. 2 Refinery,Petrochina Fushun Petrochemical Company;;Effect of structure of reactive polymer on its photoelectric properties and in-situ reaction[J];Journal of Shenyang University of Technology;2013-06
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