Results 211 to 220 of about 40,605 (259)

Penta(pyrenyl)[60]fullerenes: Pyrene–Pyrene and [60]Fullerene–Pyrene Interactions in the Crystal and in Solution

Chemistry – An Asian Journal, 2008
AbstractA new type of fullerene–pyrene hybrid molecule, C60Ar5R [Ar=1‐pyrenyl, 4‐(1‐pyrenyl)C6H4, 4‐{(1‐pyrenyl)CO2}C6H4, and 4‐{(1‐pyrenyl)(CH2)3CO2}C6H4; R=H and Me] was synthesized by a regioselective penta‐addition reaction using organocopper reagents.
Yutaka, Matsuo, Kouhei, Morita, Eiichi, Nakamura   +2 more
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Intersystem crossing in pyrene-h10 and pyrene-d10

Chemical Physics Letters, 1968
Abstract : The phosphorescence intensity, phosphorescence lifetime, and fluorescence lifetime of pyrene -h(10) and pyrene -d(10) were measured as functions of temperature from 80K to 300K. Using this data, we determine the temperature dependence of the rate constant for intersystem crossing.
P.F. Jones, S. Siegel
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Dynamics of Pyrene-Dimer Association and Ensuing Pyrene-Dimer Dissociation

The Journal of Physical Chemistry A, 2020
To address the possible role of pyrene dimers in soot, chemical dynamics simulations are reported to provide atomistic details for the process of collisional association of pyrene dimers and ensuing decomposition of pyrene dimers. The simulations are performed at 600, 900, 1200, 1600, and 2000 K temperatures (T) with different collisional impact ...
Debdutta Chakraborty, Hans Lischka, William L. Hase   +2 more
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Mutagenicity of pyrene in salmonella

Mutation Research Letters, 1985
Pyrene was tested for mutagenicity in Salmonella typhimurium strains TA97, TA98, TA100 and TA1537. Mutagenicity was seen in all strains when S9 was present.
Z, Matijasević, E, Zeiger
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Pyrene-fused subphthalocyanine

Chem. Commun., 2011
A pyrene-fused subphthalocyanine synthesized from a reaction of 2,7-di-tert-butyl-4,5,9,10-tetracyanopyrene and tetrafluorophthalonitrile exhibits red-shifted Q-band absorption and a unique linear arrangement in the solid state caused by a π-π stacking interaction.
Soji, Shimizu, Shota, Nakano, Takahisa, Hosoya, Nagao, Kobayashi   +3 more
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Fluorescence Decay of Pyrene in a Hydrogenated Pyrene Matrix

Australian Journal of Chemistry, 1979
Pyrene, 4,5-dihydropyrene and 4,5,9,10-tetrahydropyrene have been found to form a true solid solution over a range of composition. The measured fluorescence decay lifetime of pyrene in a hydrogenated pyrene matrix has been found to depend on the wavelength at which the emission is monitored, but not on the wavelength of excitation.
CM Harris, BK Selinger
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The oxidation of pyrene and benzo[a]pyrene by nonbasidiomycete soil fungi

Canadian Journal of Microbiology, 1995
The purpose of this study was to determine the ability of nonbasidiomycete soil fungi to oxidize pyrene (four rings) and benzo[a]pyrene (BaP) (five rings). Fungi were isolated from five different soils in which the polycyclic aromatic hydrocarbon content ranged from 0.8 to 80 μg/g dry soil.
L, Launen, L, Pinto, C, Wiebe, E, Kiehlmann, M, Moore   +4 more
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Bioavailability of atrazine, pyrene and benzo[a]pyrene in European river waters

Chemosphere, 2001
Thirteen river waters and one humic lake water were characterized. The effects of dissolved organic matter (DOM) on the bioavailability of atrazine, pyrene and benzo[a]pyrene (B[a]P) was evaluated. Binding of the chemicals by DOM was analyzed with the equilibrium dialysis technique. For each of the water samples, 24 h bioconcentration factors (BCFs) of
J, Akkanen, S, Penttinen, M, Haitzer, J V, Kukkonen   +3 more
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Effects of UVA and visible light on the photogenotoxicity of benzo[a]pyrene and pyrene

Environmental Toxicology, 2008
AbstractThis study investigated the role of UVA/visible light (U, 320–800 nm) and visible light (V, 400–800 nm) in the phototoxicity and photogenotoxicity of two ubiquitous polycyclic aromatic hydrocarbons (PAH): benzo[a]pyrene (BaP) and Pyrene (Pyr).
Céline, Botta, Carole, Di Giorgio, Anne-Sophie, Sabatier, Michel, De Méo   +3 more
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Properties of the correlated electronic states of pyrene and hydrogenated pyrene

Molecular Physics, 1996
Approximate calculations are reported on pyrene within the PPP model Hamiltonian using a novel restricted CI scheme which employs both molecular orbital and valence bond techniques. Also reported are detailed full CI results of the PPP model on 2,7-dihydropyrene obtained using the valence bond method.
Chakrabarti, Aparna, Anusooya, Y, Ramasesha, S   +2 more
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