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Showing 1 to 12 of 3579 entries
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Binding energy and work function of organic electrode materials phenanthraquinone, pyromellitic dianhydride and their derivatives adsorbed on graphene.

ACS applied materials & interfaces

Yu YX.
PMID: 25216389
ACS Appl Mater Interfaces. 2014 Sep 24;6(18):16267-75. doi: 10.1021/am504452a. Epub 2014 Sep 12.

Electroactive organic compounds are a novel group of green cathode materials for rechargeable metal-ion batteries. However, the organic battery life is short because the organic compounds can be dissolved by nonaqueous electrolytes. Here a comparative investigation of phenanthraquinone (PQ),...

A ternary charge-transfer complex composed of cyclotriveratrylene (CTV) and a polyoxometalate (POM) with quinone as an electronic modulator.

Chemistry, an Asian journal

Tashiro S, Hashida S, Shionoya M.
PMID: 22438300
Chem Asian J. 2012 Jun;7(6):1180-4. doi: 10.1002/asia.201200057. Epub 2012 Mar 21.

No abstract available.

Effects of aqueous extract of Ruta graveolens and its ingredients on cytochrome P450, uridine diphosphate (UDP)-glucuronosyltransferase, and reduced nicotinamide adenine dinucleotide (phosphate) (NAD(P)H)-quinone oxidoreductase in mice.

Journal of food and drug analysis

Ueng YF, Chen CC, Huang YL, Lee IJ, Yun CH, Chen YH, Huang CC.
PMID: 28911711
J Food Drug Anal. 2015 Sep;23(3):516-528. doi: 10.1016/j.jfda.2015.03.005. Epub 2015 May 21.

Ruta graveolens (the common rue) has been used for various therapeutic purposes, including relief of rheumatism and treatment of circulatory disorder. To elucidate the effects of rue on main drug-metabolizing enzymes, effects of an aqueous extract of the aerial...

Synthesis of Spiroketals by Synergistic Gold and Scandium Catalysis.

Organic letters

Liang M, Zhang S, Jia J, Tung CH, Wang J, Xu Z.
PMID: 28474897
Org Lett. 2017 May 19;19(10):2526-2529. doi: 10.1021/acs.orglett.7b00804. Epub 2017 May 05.

An ultrafast synthesis of spiroketals by synergistic gold(I) and Sc(III) catalysis has been reported. Diverse 5,6-benzannulated spiroketals were rapidly constructed by the diastereoselective [4 + 2] cycloaddition between gold-generated enol ether and Sc(III)-catalyzed o-quinone methide intermediates. Ultrafast reaction rate,...

Role of Nonradiative Defects and Environmental Oxygen on Exciton Recombination Processes in CsPbBr.

Nano letters

Lorenzon M, Sortino L, Akkerman Q, Accornero S, Pedrini J, Prato M, Pinchetti V, Meinardi F, Manna L, Brovelli S.
PMID: 28480698
Nano Lett. 2017 Jun 14;17(6):3844-3853. doi: 10.1021/acs.nanolett.7b01253. Epub 2017 May 10.

Lead halide perovskite nanocrystals (NCs) are emerging as optically active materials for solution-processed optoelectronic devices. Despite the technological relevance of tracing rational guidelines for optimizing their performances and stability beyond their intrinsic resilience to structural imperfections, no in-depth study...

Chiral phosphoric acid catalyzed enantioselective annulation of acyclic enecarbamates to in situ-generated ortho-quinone methides.

Organic & biomolecular chemistry

Gharui C, Singh S, Pan SC.
PMID: 28858366
Org Biomol Chem. 2017 Sep 13;15(35):7272-7276. doi: 10.1039/c7ob01766a.

The first organocatalytic asymmetric reaction of acyclic enecarbamates with o-quinone methides is disclosed. BINOL-based phosphoric acid catalysts were found to be suitable for the annulation reaction. With 10 mol% of the TRIP catalyst, high yields as well as excellent...

Liquid Quinones for Solvent-Free Redox Flow Batteries.

Advanced materials (Deerfield Beach, Fla.)

Shimizu A, Takenaka K, Handa N, Nokami T, Itoh T, Yoshida JI.
PMID: 28885728
Adv Mater. 2017 Nov;29(41). doi: 10.1002/adma.201606592. Epub 2017 Sep 08.

Liquid benzoquinone and naphthoquinone having diethylene glycol monomethyl ether groups are designed and synthesized as redox active materials that dissolve supporting electrolytes. The Li-ion batteries based on the liquid quinones using LiBF

Folium Sennae protects against hydroxyl radical-induced DNA damage via antioxidant mechanism: an in vitro study.

Botanical studies

Lin J, Li X, Han L, Li F, Lu W, Bai Y, Chen D.
PMID: 28510920
Bot Stud. 2014 Dec;55(1):16. doi: 10.1186/1999-3110-55-16. Epub 2014 Feb 02.

BACKGROUND: In the study, Folium Sennae (FS) was firstly extracted by various solvents to obtain five FS extracts. Then, five FS extracts were evaluated for the protective effects against •OH-induced DNA damage, antioxidant abilities in vitro, and chemical contents...

Ruthenium indenylidene "1(st) generation" olefin metathesis catalysts containing triisopropyl phosphite.

Beilstein journal of organic chemistry

Guidone S, Nahra F, Slawin AM, Cazin CS.
PMID: 26425210
Beilstein J Org Chem. 2015 Sep 01;11:1520-7. doi: 10.3762/bjoc.11.166. eCollection 2015.

The reaction of triisopropyl phosphite with phosphine-based indenylidene pre-catalysts affords "1(st) generation" cis-complexes. These have been used in olefin metathesis reactions. The cis-Ru species exhibit noticeable differences with the trans-Ru parent complexes in terms of structure, thermal stability and...

Cinchona Alkaloid Catalyzed Enantioselective [4 + 2] Annulation of Allenic Esters and in Situ Generated ortho-Quinone Methides: Asymmetric Synthesis of Functionalized Chromans.

The Journal of organic chemistry

Deng YH, Chu WD, Zhang XZ, Yan X, Yu KY, Yang LL, Huang H, Fan CA.
PMID: 28421762
J Org Chem. 2017 May 19;82(10):5433-5440. doi: 10.1021/acs.joc.7b00370. Epub 2017 May 01.

A novel enantioselective [4 + 2] annulation of the allenoates having a unique positive ortho-effect with in situ generated ortho-quinone methides has been developed under the catalysis of Cinchona alkaloid. This chiral amine-catalyzed reaction provides an alternative route to...

Photoisomerization action spectroscopy: flicking the protonated merocyanine-spiropyran switch in the gas phase.

Physical chemistry chemical physics : PCCP

Markworth PB, Adamson BD, Coughlan NJ, Goerigk L, Bieske EJ.
PMID: 26032622
Phys Chem Chem Phys. 2015 Oct 21;17(39):25676-88. doi: 10.1039/c5cp01567g.

Laser spectroscopy and ion mobility spectrometry are combined to provide structural and photochemical information on photoisomerizing molecules in the gas phase. The strategy exploits the fact that an ion packet propelled through buffer gas by an electric field separates...

β-lapachone-Induced Apoptosis of Human Gastric Carcinoma AGS Cells Is Caspase-Dependent and Regulated by the PI3K/Akt Pathway.

Biomolecules & therapeutics

Yu HY, Kim SO, Jin CY, Kim GY, Kim WJ, Yoo YH, Choi YH.
PMID: 25009698
Biomol Ther (Seoul). 2014 May;22(3):184-92. doi: 10.4062/biomolther.2014.026.

β-lapachone is a naturally occurring quinone that selectively induces apoptotic cell death in a variety of human cancer cells in vitro and in vivo; however, its mechanism of action needs to be further elaborated. In this study, we investigated...

Showing 1 to 12 of 3579 entries