551951-03-2Relevant articles and documents
Topology-directed design and synthesis of carbazole-based conjugated microporous networks for gas storage
Qiao, Shanlin,Huang, Wei,Wei, Huan,Wang, Ting,Yang, Renqiang
, p. 70904 - 70909 (2015)
Two topological-directed conjugated microporous networks, P-TPATCz and P-CzPTCz, have been synthesized. The two initial building blocks have a similar chemical constitution but different geometrical configuration (TPATCz: quasi-tetrahedron 3D and CzPTCz: quasi-coplanar 2D structure). Scanning electron microscopy and powder X-ray diffraction indicated that the quasi-tetrahedron structure monomer TPATCz is facile to form columnar crystalline aggregation, whereas the quasi-coplanar monomer of CzPTCz forms amorphous aggregation networks. Thermogravimetric analysis showed that the thermal stability of two networks at high temperature may be affected by the stability of the core in the building blocks. Changing the triphenylamine core of monomer TPATCz to 9-phenyl-9H-carbazole in CzPTCz resulted in an increase in the Brunauer-Emmett-Teller surface area of P-TPATCz (337 m2 g-1) to 1315 m2 g-1 for P-CzPTCz. The hydrogen isotherms of P-TPATCz and P-CzPTCz showed H2 storage up to 0.85 and 1.90 wt% at 77 K/1.1 bar, respectively. At 273 K/1.1 bar, the CO2 uptake capacity of P-CzPTCz was up to 17.0 wt%, which is 5.8 times than that of P-TPATCz. Fine designing and tailoring of the steric configuration of the building block can pre-determine the physicochemical property of the target networks and influence the gas uptake performance.
Synthesis of carbazole-based dendrimer: Host material for highly efficient solution-processed blue organic electrophosphorescent diodes
Jiang, Wei,Tang, Jinan,Yang, Wen,Ban, Xinxin,Huang, Bin,Dai, Yunqian,Sun, Yueming,Duan, Lian,Qiao, Juan,Wang, Liduo,Qiu, Yong
, p. 5800 - 5805 (2012)
This paper reports the synthesis and physical properties of two novel carbazole-based dendritic host materials Cz-CCP and Cz-mCP for solution-processed blue phosphorescent organic light-emitting devices (PhOLEDs). These dendritic hosts exhibit high triplet energy (≥2.85 eV), excellent film-forming ability (with low root-mean-square (rms) values less than 0.2 nm), high glass-transition temperatures in the range of 242-248 °C, and the appropriate HOMO energy levels (-5.33 - 5.35 eV) facilitating the transfer of holes from Poly(3,4-ethylenedioxythiophene):Poly(styrene-4-sulfonate) (PEDOT:PSS) to the emitting layer. The single-layer device using Cz-CCP and Cz-mCP as the host for the phosphorescence emitter iridium(III) bis(4,6-difluorophenylpyridinato)-picolinate (FIrpic) showed the maximum luminance efficiencies of 9.6 and 10.8 cd A-1, respectively. By introducing a thin 1,3,5-tris(1-phenyl-1H-benzo[d]imidazol-2-yl)benzene (TPBI) electron-transporting and exciton-confining layer, the maximum efficiency of the solution-processed double-layer device based on Cz-CCP and Cz-mCP can be further improved to 20.5 and 22.7 cd A-1, and maximum external quantum efficiencies as high as 10.2% and 11.5%, respectively. These results demonstrated that the newly synthesized, carbazole-based dendritic host materials are advantageous for fabrication of highly efficient blue PhOLEDs.
Dendritic iridium complex electroluminescent material capable of solution processing and synthetic method thereof
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, (2019/07/04)
The invention discloses a dendritic iridium complex electroluminescent material capable of solution processing and a synthetic method thereof. The molecular structure consists of two parts, one part is an iridium complex with room temperature phosphorescence property as a luminescent core, the other part is a racial with high triplet state energy level as a peripheral branch radial, and the two parts are connected through a non-conjugated radical. The molecule is of the structure as shown in the specification, wherein C1 to C3 are ionic dendritic iridium complexes, and C4 to C6 are neutral dendritic iridium complexes of similar structure. R1 and R2 are high triplet state energy level radicals with non-conjugated radical ends. The problems of synthesis, purification, device preparation technology and cost, existing in wet process preparation devices, of iridium complex materials can be solved.
Triazine derivative and application thereof on organic electroluminescence device
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Paragraph 0058; 0063, (2018/07/30)
The invention discloses a triazine derivative and application thereof on an organic electroluminescence device. The compound takes triazine as a core and has the characteristics of difficulty in crystallization among molecules, difficulty in aggregation a
