Results 61 to 70 of about 29,062 (270)

Sinteza, in vitro antitumorsko ispitivanje i radiosenzitirajuće vrednovanje novih derivata 4-[3-(supstituiranih)tioureido]-N-(kinoksalin-2-il)benzensulfonamida [PDF]

, 2011
Sulfonamides and quinoxaline derivatives possess many types of biological activities and have been recently reported to show substantial antitumor activity. This paper reports the synthesis of novel thioureidosulfaquinoxaline derivatives.
A. Budakoti, A. Carta, F. Mohamadi, Fatma Ragab, G. Rush, Helmy Heiba, J. Fisherman, M. El-Gaby, M. Fisher, M. Ghorab, M. Ghorab, M. Ghorab, Marwa El-Gazzar, Mostafa El-Gazzar, Mostafa Ghorab, P. Skehan, R. Giri, S. Sehlstedt, V. Tandon, Y. Nishimura   +19 more
core   +2 more sources

Precise Modulation of Reorganization Energy through Methyl Substitution for High Performance Organic Solar Cells

Advanced Science, EarlyView.
This study reports the design of quinoxaline‐based electron acceptors with tailored methyl and halogen substitutions to modulate reorganization energy (λ) and enhance charge transport. we demonstrated that methylation effectively reduces λ, leading to minimized energy losses and improved device performance.
Li Chen, Chaoyue Zhao, Joshua Yuk Lin Lai, Rongkun Zhou, Aleksandr Sergeev, Kam Sing Wong, Huawei Hu, Zilong Zheng, Han Yu, Sai Ho Pun, Guangye Zhang, He Yan   +11 more
wiley   +1 more source

Mobility‐Lifetime Products in Organic Infrared Photodiodes with Peak Absorption at 1550 nm

Advanced Electronic Materials, EarlyView.
This study analyzes the mobility‐lifetime products in organic infrared photodiodes with different donor‐to‐acceptor ratios to examine charge collection performance. Abstract Infrared photodiodes based on organic semiconductors are promising for low‐cost sensors that operate at room temperature. However, their realization remains hampered by poor device
Bogyeom Seo, Tyler Bills, Paramasivam Mahalingavelar, Woojo Kim, Hyeong Ju Eun, Jong H. Kim, Jason D. Azoulay, Tse Nga Ng   +7 more
wiley   +1 more source

Studies in Benzimidazo Thiazolo Quinoxalines and Benzimidazo Thiazino Quinoxalines

, 1970
Benzimidazo (2', 1': 2, 3) thiazolo (4, 5-b) quinoxalines and 7H-benzimidazo (1', 2': 4, 5) (1 : 4) thiazino (2, 3-b) quinoxalines have been synthesised by the condensations of 2-mercapto benzimidazoles with 2 : 3-dichloro quinoxalines and 2-(mercaptomethyl) benzimidazole with 2 : 3-dichloro quinoxalines respectively.
Simran Singh, Singh, Chanan, K. S. Narang   +2 more
openaire   +1 more source

Synthesis of pyrimido[1,6-a]quinoxalines via intermolecular trapping of thermally generated acyl(quinoxalin-2-yl)ketenes by Schiff bases

Beilstein Journal of Organic Chemistry, 2018
Acyl(quinoxalin-2-yl)ketenes generated by thermal decarbonylation of 3-acylpyrrolo[1,2-a]quinoxaline-1,2,4(5H)-triones react regioselectively with Schiff bases under solvent-free conditions to form pyrimido[1,6-a]quinoxaline derivatives in good yields.
Svetlana O. Kasatkina, Ekaterina E. Stepanova, Maksim V. Dmitriev, Ivan G. Mokrushin, Andrey N. Maslivets   +4 more
doaj   +1 more source

A comparison of transgenic rodent mutation and in vivo comet assay responses for 91 chemicals. [PDF]

, 2019
A database of 91 chemicals with published data from both transgenic rodent mutation (TGR) and rodent comet assays has been compiled. The objective was to compare the sensitivity of the two assays for detecting genotoxicity.
Aardema, MJ, Beevers, C, Bhalli, J, Douglas, GR, Escobar, PA, Farabaugh, CS, Guerard, M, Johnson, GE, Kirkland, D, Kulkarni, R, Le Curieux, F, LeBaron, MJ, Levy, DD, Long, AS, Lott, J, Lovell, DP, Luijten, M, Marchetti, F, Nicolette, JJ, Pfuhler, S, Roberts, DJ, Stankowski, LF, Thybaud, V, Weiner, SK, Williams, A, Witt, KL, Young, R   +26 more
core   +3 more sources

Discerning Blend Microstructure and Charge Recombination for Stable Biorenewable‐Based Organic Photovoltaics

Advanced Energy Materials, EarlyView.
A combination of morphological, electrical, and spectroscopy techniques is used to evaluate the degradation mechanisms of non‐fullerene (NFA)‐based organic photovoltaics (OPVs). Blends based on Y12 are more stable than Y6, aspeciallyOPVs from FO6‐T:Y12 demonstrated superior stability with an extrapolated T80 of over 2000 hours under maximum power point 
Eva Mazzolini, Zhuoran Qiao, Jolanda Muller, Francesco Furlan, Matteo Sanviti, Davide Nodari, Martina Rimmele, Alberto Collauto, Carsten Deibel, Martin Heeney, Jaime Martin, Flurin Eisner, Jenny Nelson, Nicola Gasparini, Julianna Panidi   +14 more
wiley   +1 more source

Photo‐ and Electroluminescence of N,N‐Diphenylaminophenyl–Quinoxaline Donor–Acceptor‐Type Dyes: Electronic Impacts of Electron‐Withdrawing Ability of the Acceptor Unit

Asian Journal of Organic Chemistry, EarlyView.
Compact N,N‐diphenylaminophenyl–quinoxaline donor–acceptor‐type dyes were synthesized, and the effects of substituents on the fluorescence properties were investigated. Introduction of electron‐withdrawing groups to the quinoxaline acceptor caused a red shift of the emission, and furthermore, thermally activated delayed fluorescence was facilitated by ...
Masaki Nagaoka, Keito Ueda, Hiroaki Chihara, Naoya Suzuki, Shintaro Kodama, Takeshi Maeda, Shigeyuki Yagi   +6 more
wiley   +1 more source

Quinoxaline and its Monohydrate [PDF]

Nature, 1946
ALTHOUGH quinoxaline, C8H6N2, was synthesized in 18841,2, and has been mentioned in the literature1–13 several times since that date, it is rather surprising that the existence of quinoxaline monohydrate has not been noticed, the more so since several physico-chemical determinations have been carried out with quinoxaline ; namely, vapour density in ...
openaire   +2 more sources

Scope and Mechanistic Study of the Ruthenium-Catalyzed \u3cem\u3eortho\u3c/em\u3e-C−H Bond Activation and Cyclization Reactions of Arylamines with Terminal Alkynes [PDF]

, 2005
The cationic ruthenium hydride complex [(PCy3)2(CO)(CH3CN)2RuH]+BF4- was found to be a highly effective catalyst for the C−H bond activation reaction of arylamines and terminal alkynes.
Yi, Chae S., Yun, Young
core   +1 more source