5369-25-5Relevant academic research and scientific papers
Interfacial and bulk properties of hole transporting materials in perovskite solar cells: spiro-MeTADversusspiro-OMeTAD
Anaraki, Elham Halvani,Gr?tzel, Michael,Grazulevicius, Juozas Vidas,Hagfeldt, Anders,Mortezaali, Abdollah,Sallenave, Xavier,Shasti, Mona,Sini, Gjergji,Volyniuk, Dmytro,Zakeeruddin, Shaik M.
, p. 8527 - 8539 (2020)
Two spiro-MeTAD compounds (1and2) were synthesized, characterized by experimental and quantum mechanical methods, and used as hole transporting materials (HTMs) in perovskite solar cells (PSCs). The new compounds differ from spiro-OMeTAD only by the presence of methyl substituents as compared to methoxy groups. This modification results in the absorption band blue shifting by ~20 nm as compared to spiro-OMeTAD, increased glass transition temperature for 2, and reduced ionization potentials by 0.02-0.12 eV. Hole mobilities five times larger were obtained for spiro-MeTAD/spiro-MeTAD, which is maintained in the presence of additives. Despite this improvement,J-Vmeasurements in PSCs resulted in a power conversion efficiency (PCE) of 17.2% and 17.05% for 1and2HTMs, respectively, as compared to 19.24% for spiro-OMeTAD. Photoluminescence measurements of perovskite:HTM layers indicate much stronger quenching in the case of spiro-OMeTAD/spiro-MeTAD. These results point to the dominant importance of the perovskite:HTM interfacial properties as compared to the HTM hole-transport properties in the bulk. Given that improved hole-mobility and energy-level alignment are the main targets of the current research efforts in this domain, our results alert to the necessity to prioritize the improvement of perovskite-HTM interaction properties.
Chan-Evans-Lam C?N Coupling Promoted by a Dinuclear Positively Charged Cu(II) Complex. Catalytic Performance and Some Evidence for the Mechanism of CEL Reaction Obviating Cu(III)/Cu(I) Catalytic Cycle
Akatyev, Nikolay,Il'in, Mikhail,Il'in, Mikhail,Peregudova, Svetlana,Peregudov, Alexander,Buyanovskaya, Anastasiya,Kudryavtsev, Kirill,Dubovik, Alexander,Grinberg, Valerij,Orlov, Victor,Pavlov, Alexander,Novikov, Valentin,Volkov, Ilya,Belokon, Yuri
, p. 3010 - 3021 (2020/04/29)
In the present study, we report the synthesis of a series of copper(II) complexes with a wide range of ligands and their testing in the copper catalyzed Chan-Evans-Lam (CEL) coupling of aniline and phenylboronic acid. The efficiency of the coupling was directly connected with the ease of the reduction of Cu(II) to Cu(I) of the complexes. The most efficient catalyst was derived from 4-t-butyl-2,5-bis[(quinolinylimino)methyl]phenolate and two Cu(II) ions. Depending on the counter-anion nature and the concentration of the reaction mixture, the reaction can be directed to predominant C?N-bond formation. Forty-three derivatives of diphenylamine were prepared under the optimized conditions. The proposed mechanism of the catalysis was based on the reduction potential of a series of complexes, molecular weight measurements of the catalytic complex in MeOH and the kinetic studies of aniline and phenylboronic acid coupling. In addition, an 1H NMR experiment in a sealed NMR tube, without external oxygen supply available, proved that no complete Cu(II) to Cu(I) conversion was observed under the condition, ruling out the usually accepted mechanism of the C?N coupling, which included the oxygenation of the intermediately formed Cu(I) complexes after the key step of C?N conversion had already been completed. Instead, a mechanism was proposed, involving an oxygen molecule coordinated to two copper ions in the key C?N bond formation without any detectable conversion of the Cu(II) complexes to Cu(I).
Direct Synthesis of Diphenylamines from Phenols and Ammonium Formate Catalyzed by Palladium
Dominguez-Huerta, Alejandra,Perepichka, Inna,Li, Chao-Jun
, p. 2999 - 3002 (2019/06/13)
Arylamines are commercially and synthetically useful compounds with a wide variety of applications. Their preparation has been traditionally achieved using metal-catalyzed C?N coupling reactions with aryl halides. In this work, 17 different diarylamines are prepared from phenols by using ammonium formate as the aminating reagent. Phenolic compounds are more desirable feedstocks, owing to their availability from lignin, making them valuable biorenewable alternatives to aryl halides. Ammonium formate is found to be a convenient surrogate for ammonia and a useful aminating reagent for phenols. Diarylamine products are obtained in good to excellent yields while only water and CO2 are generated as byproducts of the transformation.
An electroluminescent compound and an electroluminescent device comprising the same
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Paragraph 0088-0091; 0109-0112, (2016/10/20)
The present invention relates to an organic light emitting compound adopted to an organic electroluminescent device. The organic light emitting compound is represented by chemical formula 1. In the case of adopting the same as a dopant compound or a hole transfer compound in a luminous layer, an organic electroluminescent device having excellent luminous characteristics such as driving voltage, brightness, long lifespan, and the like, can be embodied.COPYRIGHT KIPO 2016
BLUE LUMINESCENT COMPOUNDS
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Page/Page column 66-67, (2016/06/06)
There is provided a compound having Formula (I), Formula (II), Formula (III), Formula (IV), Formula (V), or Formula (VI).
An electroluminescent compound and an electroluminescent device comprising the same
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Paragraph 0117; 0301; 0308; 0309; 0310, (2016/10/10)
The present invention relates to an organic light emitting compound adopted to an organic electroluminescent device. The organic light emitting compound is represented by chemical formula 1. In the case of adopting the same as a dopant compound in a lumin
Ruthenium-catalyzed cross-dehydrogenative ortho-N-carbazolation of diarylamines: Versatile access to unsymmetrical diamines
Louillat, Marie-Laure,Biafora, Agostino,Legros, Fabien,Patureau, Frederic W.
, p. 3505 - 3509 (2014/04/03)
The dehydrogenative C-N cross-coupling of unprotected, secondary anilines through ortho-N-carbazolation has been achieved using a Ru catalytic system with O2 as the terminal oxidant. The reactions proceed in an intermolecular fashion, selectively in the ortho position. Implications for the field of organic synthesis are discussed. No-No-No: Amination of a non-acidic Ci£H bond, no pre-activation of the coupling partners, no chelate-assisting directing group. Dehydrogenative C-N cross-coupling through the ortho-N-carbazolation of unprotected, secondary anilines has been achieved using a Ru catalyst with O2 as the terminal oxidant. The reactions proceed in an intermolecular fashion, selectively in the ortho position.
Synthesis of benzo-γ-sultams via the Rh-catalyzed aromatic C-H functionalization of diazosulfonamides
Yang, Zhanhui,Xu, Jiaxi
supporting information, p. 3616 - 3618 (2014/04/03)
An efficient synthesis of 1-aryl-benzo-γ-sultams, 1-aryl-1,3-dihydrobenzo[c]isothiazole-2,2-dioxides, was achieved in 65-99% yields via the Rh-catalyzed intramolecular aromatic C-H functionalization of N,N-diaryl diazosulfonamides with 0.5 mol% Rh2(oct)4 as the catalyst. This journal is the Partner Organisations 2014.
Selective one-pot synthesis of symmetrical and unsymmetrical di- and triarylamines with a ligandless copper catalytic system
Tlili, Anis,Monnier, Florian,Taillefer, Marc
supporting information; experimental part, p. 6408 - 6410 (2012/07/27)
The one-pot synthesis of symmetrical or unsymmetrical di- or triarylamines using aryl iodides or bromides and LiNH2 as ammonia source is reported. This highly selective method is based, for the first time, on a copper-catalyzed system, which does not require the presence of any additional ligand.
