112642-69-0Relevant academic research and scientific papers
New cyano-substituted organic dyes containing different electrophilic groups: Aggregation-induced emission and large two-photon absorption cross section
Zhou, Haitao,Huang, Wei,Ding, Li,Cai, Shengyun,Li, Xin,Li, Bo,Su, Jianhua
, p. 7050 - 7056 (2014)
Three aggregation-induced emission active dyes (3a-c) were synthesized and their one- and twophoton absorption properties have been investigated. They were all found to be weakly fluorescent in THF solution, while they exhibited dramatic fluorescence enhancement in water/THF mixtures. The solid fluorescence of 3a-c was recorded and their fluorescence quantum efficiency (φf) values were determined to be 8.0%, 8.1%, and 16.4%, respectively. Moreover, the two-photon absorption (2PA) crosssections (σ) of 3a-c were measured and 3a showed the highest value of 702 GM The excellent aggregation-induced emission and 2PA properties provide a promising alternative for biophotonic materials.
Synthesis and characterization of 2-alkylbenzotriazole-based donor-π-acceptor-type copolymers
Mao, Xuerong,Jiang, Xiaoxiang,Hu, Hongwen,Cheng, Yixiang,Zhu, Chengjian
, p. 1505 - 1508 (2013)
Four donor-π-acceptor-type copolymers were synthesized via palladium-catalyzed Sonogashira coupling reaction. The resulting donor-π-acceptor-conjugated copolymers can show fluorescence emission in the range of λ = 473-568 nm, and the band gaps of the alternating polymers can be tuned in the range 3.09-3.74 eV by using four different donors. Georg Thieme Verlag Stuttgart · New York.
Green and efficient protocol for N-alkylation of benzotriazole using basic ionic liquid [Bmim]OH as catalyst under solvent-free conditions
Le, Zhang-Gao,Zhong, Tao,Xie, Zong-Bo,Lue, Xue-Xia,Cao, Xia
, p. 2525 - 2530 (2010)
N-Alkylation of benzotriazole bearing an acidic hydrogen atom attached to nitrogen with alkyl halides is accomplished in basic ionic liquid [Bmim]OH (1-butyl-3-methylimidazolium hydroxide) under solvent-free conditions. The procedure is convenient and efficient and generally affords the N-alkylated product. Taylor & Francis Group, LLC.
Rapid Synthesis of D-A'-π-A Dyes through a One-Pot Three-Component Suzuki-Miyaura Coupling and an Evaluation of their Photovoltaic Properties for Use in Dye-Sensitized Solar Cells
Irie, Shunsuke,Fuse, Shinichiro,Maitani, Masato M.,Wada, Yuji,Ogomi, Yuhei,Hayase, Shuzi,Kaiho, Tatsuo,Masui, Hisashi,Tanaka, Hiroshi,Takahashi, Takashi
, p. 2507 - 2514 (2016)
Twenty-four D-A'-π-A dyes were rapidly synthesized through a one-pot three-component Suzuki-Miyaura coupling reaction, which was assisted by microwave irradiation. We measured the absorption spectra, electrochemical properties, and solar-cell performance
HIGHLY-FLUORESCENT AND PHOTO-STABLE CHROMOPHORES FOR ENHANCED SOLAR HARVESTING EFFICIENCY
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Paragraph 0231, (2013/04/10)
The invention provides highly fluorescent materials comprising a single (n=0) or a series (n=1, 2, etc.) of benzo heterocyclic systems. The photo-stable highly luminescent chromophores are useful in various applications, including in wavelength conversion films. Wavelength conversion films have the potential to significantly enhance the solar harvesting efficiency of photovoltaic or solar cell devices.
Influence of polarity on the scalability and reproducibility of solvent-free microwave-assisted reactions
Diaz-Ortiz, Ange,De La Hoz, Antonio,Alcazar, Jesus,Carrillo, Jose R.,Herrero, Maria A.,Fontana, Alberto,Munoz, Juan De M.,Prieto, Pilar,De Cozar, Abel
experimental part, p. 109 - 116 (2012/04/18)
Organic reactions performed in the absence of solvent in domestic ovens without appropriate temperature control are generally considered as not reproducible, particularly when different instruments are used. For this reason, reproducibility has historically been one of the major issues associated with Microwave-Assisted Organic Synthesis (MAOS) especially when domestic ovens are involved. The lack of reproducibility limits the general applicability and the scale up of these reactions. In this work several solvent-free reactions previously carried out in domestic ovens have been translated into a single-mode microwave reactor and then scaled up in a multimode oven. The results show that most of these reactions, although not considered as reproducible, can be easily updated and applied in microwave reactors using temperature-controlled conditions. Furthermore, computational calculations can assist to explain and/or predict whether a reaction will be reproducible or not.
Dimerizations of 2-alkylbenzotriazoles and chemical evidence of radical intermediates from X-ray studies
Katritzky, Alan R.,Jesorka, Aldo,Wang, Jin,Yang, Baozhen,Wu, Jing,Steel, Peter J.
, p. 745 - 755 (2007/10/03)
Treatment of 2-alkylbenzotriazoles with lithium diisopropylamide (LDA) at -78°C gave, depending on workup conditions, either dimers of the type Bt2CHR-CHRBt2 (2) (Bt2 = benzotriazol-2-yl), or mixtures of symmetrical Z and E olefins (3) (RCH=CHR), in high yields via radical intermediates. The racemic and meso isomers of 2, which differ substantially in properties such as melting points, 1H and 13C NMR, were isolated and characterized (three by X-ray crystallography). Both the meso and racemic dimers of 2 were reduced by Na to give mixtures of Z and E olefins in high yields with the elimination of the benzotriazole anion. 2-Alkylbenzotriazoles (1) were also converted by Na into the corresponding alkanes and benzotriazole. The intermediates were trapped by benzophenone to give, depending on the reaction procedure (see Scheme 2), adducts 6 or adducts 6 with dimers 2, benzotriazol-2-ylalkene 7 and compound 8 (R = H), compound 9 (R = CH3). Several compounds with dibenzotriazol-2-yl groups or benzotriazol-1-yl and benzotriazol-2-yl groups in the same molecule were synthesized and further investigated via lithiation followed by the addition of benzophenone or benzaldehyde. This further indicated that the radical reaction is faster than the nucleophilic reaction. VCH Verlagsgesellschaft mbH, 1996.
SELECTIVE ALKYLATIONS OF 1,2,4-TRIAZOLE AND BENZOTRIAZOLE IN THE ABSENCE OF SOLVENT
Abenhaim, David,Diez-Barra, Enrique,Hoz, Antonio de la,Loupy, Andre,Sanchez-Migallon, Ana
, p. 793 - 802 (2007/10/02)
Alkylation of 1,2,4-triazole and benzotriazole has been performed either in basic media under solvent free phase transfer catalysis conditions or in the absence of base by conventional and microwave heating.Several parameters affecting the selectivity have been studied.In the case of triazole alkylation, microwave irradiation produces specific (non thermal) effects both on reactivity and selectivity.
