نتایج جستجو برای: anthracene derivatives

تعداد نتایج: 108664  

2009
Keith T. Gagnon Show-Yi Ju Michael B. Goshe E. Stuart Maxwell Stefan Franzen

New classes of RNA enzymes or ribozymes have been obtained by in vitro evolution and selection of RNA molecules. Incorporation of modified nucleotides into the RNA sequence has been proposed to enhance function. DA22 is a modified RNA containing 5-(4-pyridylmethyl) carboxamide uridines, which has been selected for its ability to promote a Diels-Alder cycloaddition reaction. Here, we show that D...

2015
Victor Gray Damir Dzebo Angelica Lundin Jonathan Alborzpour Maria Abrahamsson Bo Albinsson Kasper Moth-Poulsen

Molecules based on anthracene are commonly used in applications such as OLEDs and triplet–triplet annihilation upconversion. In future design of blue emitting materials it is useful to know which part of the molecule can be altered in order to obtain new physical properties without losing the inherent optical properties. We have studied the effect of substitution of 9,10-substituted anthracenes...

Journal: :Chemistry 2007
Elaine A Medlycott Garry S Hanan Frédérique Loiseau Sebastiano Campagna

A series of new heteroleptic and homoleptic Ru(II) complexes containing variously substituted bis(pyridyl)triazine ligands has been prepared and their absorption spectra, redox behaviour and luminescence properties (both in fluid solution at room temperature and in a rigid matrix at 77 K) have been investigated. For some compounds, X-ray structures have also been determined. The new bis(pyridyl...

Journal: :Bioconjugate chemistry 2010
Frank Seela Suresh S Pujari

The internal dye labeling of DNA by the Huisgen-Meldal-Sharpless "click" reaction is described. Fluorogenic 9-azidomethyl anthracene 2 and 3-azido-7-hydroxycoumarin 3 were employed in the postsynthetic functionalization of oligonucleotides incorporating octa-(1,7)-diynyl-8-aza-7-deaza-2'-deoxyadenosine 1. Nucleoside 1 was prepared by Sonogashira cross coupling from the corresponding 7-iodo comp...

2012
Esmeralda Morillo María Antonia Sánchez-Trujillo José Ramón Moyano Jaime Villaverde María Eulalia Gómez-Pantoja José Ignacio Pérez-Martínez

Solubilisation of six polycyclic aromatic hydrocarbons (PAHs) (acenaphthene, anthracene, fluoranthene, fluorene, phenanthrene and pyrene) by three synthetic cyclodextrins (CDs) (2-hydroxypropyl-β-CD, hydroxypropyl-γ-CD and randomly methylated-β-CD) was investigated in order to select the CD which presents the greatest increase in solubility and better complexation parameters for its use in cont...

2006
Roman Dimitriu

The influence of aromatics on the pyrolysis of ethane and propane was studied using benzene, toluene, α-methylnaphthalene and anthracene as model compounds. The experiments were performed in a tubular flow reactor at ordinary pressure, temperatures of 700-850°C, residence times between 0.1-1s and low concentration of aromatics (1-6%mole). Aromatic hydrocarbons inhibited the pyrolysis rate of et...

Journal: :Cancer research 1979
T J Slaga G L Gleason J DiGiovanni K B Sukumaran R G Harvey

The abilities of the racemic trans-3,4-, 5,6-, and 8,9-dihydrodiols of 7,12-dimethylbenz(a)anthracene to initiate skin tumors in mice were determined by using a two-stage system of tumorigenesis. The 7,12-dimethylbenz(a)anthracene trans-3,4-dihydrodiol was found to be much more active as a tumor initiator than the parent hydrocarbon. The 7,12-dimethylbenz(a)anthracene trans-5,6- and 8,9-dihydro...

Journal: :Journal of agricultural and food chemistry 2005
Leonora Mendoza Ramiro Araya-Maturana Wilson Cardona Tomás Delgado-Castro Carolina García Carol Lagos Milena Cotoras

The effect on mycelial growth of the fungus Botrytis cinerea of a set of structurally related tricyclic hydroquinones [9,10-dihydroxy-4,4-dimethyl-2,3,5,8-tetrahydroantracen-1(4H)-one and 9,10-dihydroxy-4,4-dimethyl-5,8-dihydroanthracen-1(4H)-one derivatives] and tricyclic quinones [4,4-dimethylanthracen-1,9,10(4H)-trione derivatives] was studied. In general, the anthraquinones presented higher...

Journal: :Jurnal kimia Valensi 2022

In this research, the synthesis of 1,3,5,7-tetrahydroxy-9,10-anthraquinone (1) and two anthrone derivatives, 1,3,5,7-tetrahydroxy-10H-anthracene-9-one (2) 1-hydroxy-3,5,7,9-tetramethoxyanthracene (3) has been done. Compound 1 was synthesized by a symmetrical condensation reaction 3,5-dihydroxybenzoic acid in concentrated sulfuric acid. Reduction carbonyl group compound with SnCl2/HCl-HOAc affor...

2005
R. Fraenkel U. Samuni Y. Haas

The UV absorption and emission spectra of anthracene in an argon matrix were measured. Three major spectroscopic systems were observed, assignable to anthracene molecules occupying distinct sites. The origins of these systems were red-shifted with respect to the isolated molecule by 535,69 1 and 722 cm-‘. At 17 K all lines were well resolved, with about 8 cm-’ fwhm. Addition of a small amount o...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید