6407-29-0Relevant academic research and scientific papers
Synthesis, aggregation-induced emission, and electroluminescence of dibenzothiophene- and dibenzofuran-containing tetraarylethenes
Xie, Ni,Liu, Yang,Hu, Rongrong,Leung, Nelson L. C.,Arseneault, Mathieu,Tang, Ben Zhong
, p. 958 - 966 (2014)
Dibenzothiophene- and dibenzofuran-functionalized ethanes were synthesized by the McMurry coupling reaction. The luminogens are faintly emissive when molecularly dissolved in good solvents, but emit intensively when aggregated as nanoparticles in poor sol
Ultrafast Delivery of Aggregation-Induced Emission Nanoparticles and Pure Organic Phosphorescent Nanocrystals by Saponin Encapsulation
Nicol, Alexander,Kwok, Ryan T. K.,Chen, Congping,Zhao, Weijun,Chen, Ming,Qu, Jianan,Tang, Ben Zhong
, p. 14792 - 14799 (2017)
Saponins are a class of naturally occurring bioactive and biocompatible amphiphilic glycosides produced by plants. Some saponins, such as α-hederin, exhibit unique cell membrane interactions. At concentrations above their critical micelle concentration, t
Thermally stable indoloacridine type host material for high efficiency blue phosphorescent organic light-emitting diodes
Seo, Jeong-A,Gong, Myoung Seon,Lee, Jun Yeob
, p. 3773 - 3779 (2014)
High triplet energy materials derived from carbazole or α-carboline modified indoloacridine were synthesized and device characteristics of blue triplet emitter doped devices were investigated. The indoloacridine derived host materials showed a high triplet energy above 2.80 eV and a high glass transition temperature over 170 °C due to rigid nature of the molecular structure. The indoloacridine based host materials could approach high external quantum efficiency above 20% in blue phosphorescent organic light-emitting diodes.
Composition and synthesis of aggregation-induced emission materials
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Page/Page column 40, (2018/04/20)
The present subject matter relates to compositions containing and synthesis of fluorescent materials e made from tetraphenylethylene (TPE) derivative compounds exhibiting aggregation induced emission (AIE) properties. Further contemplated herein are applications for TPE derivative compounds such as electroluminescent devices since they have a high efficiency, low turn on voltage, and excellent brightness. Additionally, application of TPE derivatives exhibiting AIE properties in various fields such as OLEDs, fingerprinting and forensic technology, and various other biological and industrial sectors are discussed.
Novel hetero-cyclic compound and organic light emitting device comprising the same
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Paragraph 0225-0227, (2018/08/28)
Provided are a novel compound and an organic light emitting device comprising the same. The compound is represented by chemical formula 1. The abovementioned compound represented by the chemical formula 1 can be used as a material for an organic material layer of an organic light emitting device, for improving the efficiency, the low driving voltage and/or the lifetime characteristics in the organic light emitting device.COPYRIGHT KIPO 2018
Synthesis and antitumor activities of novel dibenzo[b,d]furan-imidazole hybrid compounds
Liu, Lan-Xiang,Wang, Xue-Quan,Yan, Ju-Ming,Li, Yan,Sun, Cheng-Jun,Chen, Wen,Zhou, Bei,Zhang, Hong-Bin,Yang, Xiao-Dong
supporting information, p. 423 - 437 (2013/10/01)
A series of novel hybrid compounds between dibenzo[b,d]furan and imidazole has been prepared and evaluated in vitro against a panel of human tumor cell lines. The results suggest that the existence of benzimidazole ring, and the substitution of the imidaz
Positional Reactivity of Dibenzofuran in Electrophilic Substitutions
Keumi, Takashi,Tomioka, Naoto,Hamanaka, Kozo,Kakihara, Hirohito,Fukishima, Masahiko,et al.
, p. 4671 - 4677 (2007/10/02)
Isomer distributions of dibenzofuran (DBF) in Friedel-Crafts acylations, Friedel-Crafts alkylations, and nitrations have been determined.The 2- and 3-positions of DBF represents most of the total reactivity.However, the ratio of 2- to 3-isomers greatly varied, depending on the nature of the electrophile.The positional reactivities have been found to be in the following sequence: 2- > 3- > 1- > 4-positions for Friedel-Crafts acylations, Friedel-Crafts benzylations, and nitrations with alkyl nitrate/Lewis acid or nitronium tetrafluoroborate.The ratios for acylations varied over a range from 13.1 to 2.9, while for benzylations and nitrations from 2.0 to 1.0.In contrast, for nitrations of DBF with nitric acid a different reactivity order was found: 3- > 2- > 1- > 4-, with the ratio varying from 0.8 to 0.03 depending on the nature of solvents used.The selectivity for the 3-substitution increased with increase in nitronium ion-like character of nitrating reagents.In particular, nitration with nitric acid in dichloromethane gave mostly 3-nitro-DBF (95percent of the four possible isomeric mixture).The charge-transfer nitration with tetranitromethane under the UV irradiation has shown a similar isomer distribution to that in nitration with nitric acid.The MNDO calculations predicts that the late transition-state model (by ?-complex) favors reactions at the 2-position while the early transition-state model (by HOMO electron density) leads to the 3-substitution.
Palladium Acetate-Mediated Cyclizations of Di- and Trifunctional Triarylamines, Diaryl Ethers, and Diaryl Ketones
Hellwinkel, Dieter,Kistenmacher, Thomas
, p. 945 - 950 (2007/10/02)
Triphenylamine and its 4,(4',4")-substituted nitro or ester and methyl derivatives are cyclodehydrogenated to the corresponding carbazole derivatives 4a-d with Pd(OAc)2 in acetic acid.Further cyclizations can not be observed.Multiple cyclizations of this kind, however, can be realized with compounds of the 1,4-diphenoxybenzene (6a), 1,4-dibenzoylbenzene (6b), and 2,8-diphenoxydibenzofuran type (10), where in a very simple manner benzobisbenzofurans 8a, 9a, indenofluorene-6,12-dione (8b), 11H-fluorenobenzofuran-11-one (8c), and bisbenzofurodibenzofuran (12) become accessible.
Solvent Effects on Isomer Distributions and Relative Rates in Friedel-Crafts Benzylation and Benzoylation of Dibenzofuran Derivatives
Keumi, Takashi,Nakamura, Masatoshi,Kitamura, Masao,Tomioka, Naoto,Kitajima, Hidehiko
, p. 909 - 914 (2007/10/02)
The positional reactivity order in Friedel-Crafts benzoylation and benzylation of dibenzofuran (DBF) is found to be 2 > 3 > 1 >= 4.Both the partial rate factors and the positional selectivity for the benzylation of DBF are very low compared with those of
