936498-10-1Relevant articles and documents
Synthesis and properties of hyperbranched fluorescence/phosphorescence hybrid copolymers for white polymer light emitting devices
Wu, Yuling,Li, Jie,Liang, Wenqing,Yang, Junli,Sun, Jing,Wang, Hua,Liu, Xuguang,Xu, Bingshe
, p. 8052 - 8058 (2015)
A series of hyperbranched fluorescence/phosphorescence hybrid copolymers with 9,9-dioctylfluorene and bis(1-phenyl-isoquinoline)(acetylacetonato)iridium(III) (Ir(piq)2acac) as the branches and the three-dimensional structured spiro[3,3]heptane-2,6-dispirofluorene (SDF, 10 mol %) as the core have been synthesized by adjusting the feeding ratios of Ir(piq)2acac (0.02-0.05 mol %). The copolymers showed good thermal and spectral stability, and amorphous film morphology because of the hyperbranched structures. The 2,7-substituted fluorenes of SDF were incorporated into the π-system of the polyfluorene branches, and remained the F?rster resonance energy transfer (FRET) efficiency from fluorene segment to Ir(piq)2acac unit. The copolymers exhibited efficient electroluminescent characters, and white-light emission was achieved in PFSDF-Ir4 (Ir(piq)2acac 0.04 mol %)-based single layer device with CIE coordinates at (0.30, 0.34), a maximum luminance of 6777.3 cd/m2 (at 18.3 V), and a maximum current efficiency of 4.0 cd/A.
Phase-selective modulation of TiO2 for visible light-driven C–H arylation: Tuning of absorption and adsorptivity
Bak, Sora,Lee, Sae Mi,Hwang, Hee Min,Lee, Hyoyoung
, p. 71 - 76 (2019/05/08)
To understand and modify TiO2 for organic photoreaction, two points are important: improving light absorption and retaining adsorption sites for organic reagents. Herein, we tuning the absorption and adsorption of TiO2 by introducing
Hyperbranched polymers with aggregation-induced emission property for solution-processed white organic light-emitting diodes
Wu, Dongyu,Zhang, Tiaomei,Sun, Jing,Wu, Yuling,Liao, Xiaoqing,Lu, Guojing,Yang, Jingjing,Wang, Hua,Li, Lu,Xu, Bingshe
, p. 7218 - 7227 (2018/11/10)
In this work, a new series of hyperbranched polymers of PFTPE-Ir(piq)3-X(X = 1, 5, 10) were designed and synthesized, in which tris(1-phenylisoquinoline)iridium(Ш) (Ir(piq)3) acts as red emission core and PFTPE acts as branches. The
A novel high-efficiency white hyperbranched polymer derived from polyfluorene with green and red iridium(III) complexes as the cores
Sun, Jing,Wang, Hua,Xu, Huixia,Zhang, Tiaomei,Li, Lu,Li, Jie,Wu, Yuling,Xu, Bingshe,Zhang, Xinwen,Lai, Wenyong
, p. 191 - 201 (2016/04/05)
A new kind of single triple-color hyperbranched polymer PF-Ir(ppy)2(pytzph)m-Ir(piq)2(pytzph)n was designed and synthesized, in which green and red iridium(III) complexes acted as cores and blue polyfluorene acted as backbone. PF-Ir(ppy)2(pytzph)m-Ir(piq)2(pytzph)n (m = 5, n = 5 and m = 25, n = 5) had higher quantum efficiency than PF-Ir(piq)2(pytzph)5. The energy transfer from green core bis(2-phenylpyridine)[3-(2-pyridyl)-5-phenyl-1,2,4-triazole]iridium(III) [Ir(ppy)2(pytzph)] with high triplet energy level (ET = 2.58 eV) to red core bis(1-phenylisoquinolinato)[3-(2-pyridyl)-5-phenyl-1,2,4-triazole]iridium(III) [Ir(piq)2(pytzph)] (ET = 2.12 eV) could realize by intermediate poly(9,9-dioctylfluorene) (PF) segments. A typical single emitting-layer device with the configuration of ITO/PEDOT:PSS (40 nm)/PF-Ir(ppy)2(pytzph)m-Ir(piq)2(pytzph)n (80 nm)/TPBi (40 nm)/LiF (0.8 nm)/Al (100 nm) was fabricated. Among the white polymers, PF-Ir(ppy)2(pytzph)5-Ir(piq)2(pytzph)5 exhibited excellent electroluminescent properties with a Commission Internationale Ed I'eclairage (CIE) coordinate of (0.32, 0.34) and a maximum luminous efficiency of 11.49 cd/A.
Total syntheses of menisporphine and daurioxoisoporphine c enabled by photoredox-catalyzed direct C-H arylation of isoquinoline with aryldiazonium Salt
Zhang, Jing,Chen, Jie,Zhang, Xiaoyun,Lei, Xiaoguang
, p. 10682 - 10688 (2015/02/19)
Isoquinoline alkaloids are attractive natural products due to their diverse chemical structures as well as remarkable bioactivities. Herein, we report the concise total syntheses of two isoquinoline alkaloids, menisporphine and daurioxoisoporphine C, through a mild and efficient photoredox-catalyzed direct C-H arylation of isoquinoline core with aryldiazonium salt. This new strategy is complementary to the conventional isoquinoline synthesis and would provide us a useful means to achieve a more convergent and flexible approach to access diverse isoquinoline structures.