| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Synthesis and Properties of Star Bipolar Blue Phosphorescent Host Materials Based on Triphenyl-1,3,5-s-Triazine |
| XIE Fengming1,2, WEI Huaixin1,2, ZHANG Qiang1,2, ZHOU Jiahong1,2, ZHAO Xin1,2
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1 School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009
2 Jiangsu Key Laboratory of Environmental Functional Materials, Suzhou 215009 |
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Abstract Two star bipolar blue phosphorescent host materials with triphenyl-1,3,5-s-triazine as the core were designed and synthesized: ((6-(3-(9-ethyl-9H-carbazol-3-yl)phenyl)-1,3,5-triazine-2,4-diyl)bis(3-phenyl)) bis(diphenylpho-sphine oxide) (CzPTBPO) and (3-(4,6-bis(3-(9-ethyl-9H-carbazol-3-yl)phenyl)-1,3,5-triazin-2-yl)phenyl)di-phenyl-phosphine oxide(BCzPTPO). The fluorescence emission peaks of CzPTBPO and BCzPTPO are located at 410 nm and 424 nm, respectively, which are dark blue fluorescence. As calculated from the first emission peak of low-temperature phosphorescence, the triplet level (ET) is 2.75 eV and 2.68 eV, which matched with the energy level of blue phosphorescent guest material FIrpic (2.65 eV). The HOMO levels are calculated to be -5.68 eV and -5.62 eV, respectively, which match the function of the anode ITO (-4.5—-5.0 eV), and the LUMO levels are -2.42 eV and -2.44 eV, respectively. It can be matched with most electron transport materials (such as TPBi is -2.70 eV), indicating that they have good bipolar properties of hole injection and electron transport. TG shows that the decomposition temperature (5% mass loss) is 398 ℃ and 387 ℃, respectively, indicating that the thermal stability is very good. DSC shows that the glass transition temperature is 148 ℃ and 134 ℃, respectively, indicating that it has an amorphous structure and good film-forming performance. Therefore, CzPTBPO and BCzPTPO are expected to be used as a bipolar blue phosphorescent host material in PhOLEDs.
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Published: 28 October 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (61705154), the Graduate Research Innovation Project of Jiangsu Province (SKCX17_036). |
| About author:: Fengming Xie, a graduate student at Suzhou University of Science and Technology, focusing on the research of performance and synthesis of organic photoelectric materials;Xin Zhaois a professor and a postgraduate supervisor in Suzhou University of Science and Technology. He received his M.S. degree in applied chemistry from Huazhong University of Science and Technology (HUST) in 1996. His main research areas are design, synthesis and application of organic photoelectric functional materials. He has published more than 70 research papers in important domestic and foreign academic journals. |
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Liu Y, Cui L S, Shi X B, et al. Journal of Materials Chemistry C, 2014, 2(41),8736.2 Dong S C, Zhang L, Liang J, et al. The Journal of Physical Chemistry C, 2014, 118(5),2375.3 Jang H G, Kim B S, Lee J Y, et al. Dalton Transactions, 2014, 43(21),7712.4 Kim J H, Hwang S H, Song W, et al. Dyes and Pigments, 2015, 122,103.5 Kessler F, Watanabe Y, Sasabe H, et al. Journal of Materials Chemistry C, 2013,1(6),1070.6 Sasabe H, Kido J. Chemistry of Materials, 2011, 23(3),621.7 Seino Y, Sasabe H, Pu Y J, et al. Advanced Materials, 2014, 26(10),1612.8 Pan B, Wang B, Wang Y, et al. Journal of Materials Chemistry C, 2014, 2(14),2466.9 Shi H, Xin D, Dong X, et al. Journal of Materials Chemistry C, 2014, 2(12),2160.10 Sun D, Fu Q, Ren Z, et al. Polymer Chemistry, 2014, 5(1),220.11 Hung W Y, Chi L C, Chen W J, et al. Journal of Materials Chemistry, 2010, 20(45), 10113.12 Ban X, Jiang W, Sun K, et al. ACS Applied Materials & Interfaces, 2015, 7(13),7303.13 Cheng S H, Hung W Y, Cheng M H, et al. Journal of Materials Chemistry C, 2014, 2(40),8554.14 Zhuang J, Li W, Su W, et al. New Journal of Chemistry, 2014, 38(2),650.15 Rothmann M M, Fuchs E, Schildknecht C, et al. Organic Electronics, 2011, 12(7),1192.16 Xiao J, Liu X K, Wang X X, et al. Organic Electronics, 2014, 15(11),2763.17 Zhang Z, Liu R, Zhu X, et al. Journal of Luminescence, 2014, 156,130.18 Chen K, Zhao H R, Fan Z K, et al. Organic Letters, 2015, 17(6),1413.
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2019, Vol. 33 
