37500-95-1Relevant articles and documents
Preorganized anion traps for exploiting anion-π interactions: An experimental and computational study
Bretschneider, Anne,Andrada, Diego M.,Dechert, Sebastian,Meyer, Steffen,Mata, Ricardo A.,Meyer, Franc
, p. 16988 - 17000 (2013)
1,3-Bis(pentafluorophenyl-imino)isoindoline (AF) and 3,6-di-tert-butyl-1,8-bis(pentafluorophenyl)-9H-carbazole (BF) have been designed as preorganized anion receptors that exploit anion-π interactions, and their ability to bind chlor
Creation of cationic iridium(iii) complexes with aggregation-induced phosphorescent emission (AIPE) properties by increasing rotation groups on carbazole peripheries
Shan, Guo-Gang,Zhu, Dong-Xia,Li, Hai-Bin,Li, Peng,Su, Zhong-Min,Liao, Yi
, p. 2947 - 2953 (2011)
Three cationic iridium complexes containing 4,7-bis(3,6-di-tert-butyl-9H- carbazol-9-yl)-1,10-phenanthroline (L1) and 4,7-bis(3′, 6′-di-tert-butyl-6-(3,6-di-tert-butyl-9H-carbazol-9-yl)-3, 9′-bi(9H-carbazol)-9-yl)-1,10-phenanthroline (L2/
Carbazole based polymers as hosts for blue iridium emitters: Synthesis, photophysics and high efficiency PLEDs
Stanislovaityte, Egle,Simokaitiene, Jurate,Raisys, Steponas,Al-Attar, Hameed,Grazulevicius, Juozas V.,Monkman, Andrew P.,Jankus, Vygintas
, p. 8209 - 8221 (2013)
This article reports the synthesis of new carbazole based polymers and their application as hosts in sky-blue polymer light emitting devices (PLEDs) with a solution-processed emitting layer doped with a cyclometalated Ir(iii) complex. We systematically investigate their effect on the PLED performance. A current efficiency of 19.7 cd A-1 and a brightness of 1850 cd m -2 were achieved with these polymers. The roll-off in electrophosphorescent quantum efficiency in PLEDs was shown to arise mainly from triplet-triplet annihilation between dopants in the hosts with tert-butyl groups. It has been shown that in the devices with hosts without tert-butyl groups the efficiency roll-off is additionally affected by electric field quenching. In these carbazole based polymers, triplet dimers are formed and tert-butyl groups do not limit the intermolecular interactions to prevent triplet dimer formation, nevertheless tert-butyl groups reduce charge transport.
A route to a cyclobutane-linked double-looped system: Via a helical macrocycle
Klajn, Jan,Stawski, Wojciech,Chmielewski, Piotr J.,Cybińska, Joanna,Pawlicki, Mi?osz
, p. 4558 - 4561 (2019)
Macrocycles built of carbazole and pyridine fragments with alkene/alkane linkers constitute a helical structure as documented structurally and spectroscopically. The 'solid-state' prearrangement observed for two CC bonds leads to unprecedented transformation to a cyclobutane in a head-to-tail (rtct) geometry with two macrocyclic loops in a perpendicular orientation.
Methoxy- and tert-butyl-substituted meta-bis(N-carbazolyl)phenylenes as hosts for organic light-emitting diodes
Keruckas, Jonas,Volyniuk, Dmytro,Simokaitiene, Jurate,Narbutaitis, Edgaras,Lazauskas, Algirdas,Lee, Pei-Hsi,Chiu, Tien-Lung,Lin, Chi-Feng,Arsenyan, Pavel,Lee, Jiun-Haw,Grazulevicius, Juozas V.
, p. 317 - 326 (2019)
Two new analogues of a popular host material, meta-bis(N-carbazolyl)phenylene (mCP), bearing either methoxy- (mCP-OMe) or tert-butyl (mCP-t-Bu) substituents at C-3 and C-6 positions of carbazole moieties were synthesized and characterized. These materials exhibit higher glass-transition temperatures (79 and 145 °C) than mCP (67 °C). They show reversibility upon electrochemical oxidation while preserving high enough triplet energy levels (2.86 and 2.97 eV). The vacuum-deposited layer of mCP-t-Bu showed hole mobility of 8 × 10?3 cm2V?1s?1 at the electric field of 1.2 × 105 Vcm?1. This value is more than by one order of magnitude higher than that of mCP. The new compounds were tested as hosts for commercial emitters: blue phosphor, bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic), green and blue thermally-activated delayed fluorescence (TADF) emitters 1,2,3,5-tetrakis(9-carbazolyl)-4,6-dicyanobenzene (4CzIPN) and bis[4-(9,9-dimethyl-9,10-dihydroacridin-10-yl)phenyl]sulfone (DMAC-DPS). Blue phosphorescent OLED based on mCP-t-Bu as the host showed up to 22.0% external quantum efficiency. When doping 4CzIPN into mCP-OMe host, a broad emission with peaks at 388, 514, and 572 nm was observed.
Synthesis and characterization of starburst 9-phenylcarbazole/triazatruxene hybrids
Lai, Wen-Yong,He, Qi-Yuan,Chen, Dao-Yong,Huang, Wei
, p. 986 - 987 (2008)
Novel starburst triazatruxenes functionalized with six N-phenylated carbazole units have been synthesized and characterized. Good yields and high purity were readily obtained via an optimized microwave-enhanced six-fold Suzuki coupling methodology. High thermal stability and good amorphous properties as well as deep blue emissions (423-434 nm) were demonstrated. The introduction of six-substituted triazatruxene scaffolds could provide a new guideline for exploring novel solution-processable amorphous materials with dual functions for light-emitting and/or hole-transporting applications. Copyright
Thermally activated delayed fluorescence enantiomers for solution-processed circularly polarized electroluminescence
Sun, Sibing,Wang, Jun,Chen, Lingfeng,Chen, Runfeng,Jin, Jibiao,Chen, Cailin,Chen, Shufen,Xie, Guohua,Zheng, Chao,Huang, Wei
, p. 14511 - 14516 (2019)
Circularly polarized organic light-emitting diodes (CP-OLEDs) with thermally activated delayed fluorescence (TADF) characteristics are receiving increasing interest, as they have shown improving efficiencies of circularly polarized electroluminescence (CPEL). Here, we developed a series of TADF enantiomers based on chiral binaphthalene, an acceptor (A) of cyanopyridine, and donors (D) of carbazoles in a chiral-A-D architecture. Good solubility, high luminescence yields, and excellent chiral stability with a photoluminescence dissymmetry factor (gPL) up to 5.8 × 10-4 were achieved. Efficient CP-OLEDs using these chiral TADF molecules as dopants were successfully fabricated, exhibiting high external quantum efficiencies (EQEs) up to 12.4% and opposite CPEL signals with gEL of 6 × 10-4/-8.6 × 10-4 in vacuum-deposited devices. More impressively, the solution-processed TADF CP-OLEDs result in much larger gEL values (3.5 × 10-3/-3.9 × 10-3) with EQEs up to 10.6%. This discovery is encouraging and instructive, which could stimulate the development of high-performance CP-OLEDs using chiral TADF molecules through solution-processing approaches.
Ideal bipolar host materials with bis-benzimidazole unit for highly efficient solution-processed green electrophosphorescent devices
Jiang, Wei,Tang, Jinan,Ban, Xinxin,Sun, Yueming,Duan, Lian,Qiu, Yong
, p. 5346 - 5349 (2014)
An ideal host material with high triplet energy, suitable HOMO energy level, excellent thermal and electrochemical stability, and bipolar charge carrier transport ability was synthesized. A high external quantum efficiency of 13.7% and a luminance e ffici
Solution-processible carbazole dendrimers as host materials for highly efficient phosphorescent organic light-emitting diodes
Li, Jiuyan,Zhang, Ting,Liang, Yunjing,Yang, Ruixia
, p. 619 - 628 (2013)
A group of dendrimers with oligo-carbazole dendrons appended at 4,4′- positions of biphenyl core are synthesized for use as host materials for solution-processible phosphorescent organic light-emitting diodes (PHOLEDs). In comparison with the traditional
Carbazole-containing porphyrinoid and its oligomers
Kim, Dongho,Kim, Taeyeon,Song, Jianxin,Wang, Kaisheng,Wu, Tongjing,Xu, Ling,Yin, Bangshao,Zhou, Mingbo
, p. 11454 - 11457 (2019)
A novel carbazole-containing porphyrinoid 4H and its oligomers 6H and 7H were synthesized for the first time via the Suzuki-Miyaura cross-coupling reaction. The structures of 4H, 4Pd, 6H, and 6Zn were finally confirmed by X-ray analysis. The exciton coupl