- ELECTRON TRANSPORT MATERIAL, ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
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Provided is an electron transport material represented by formula (1): wherein X represents an oxygen atom or ═C(CN)2; R1, R2, R3, R4, R5, R6, and R7 each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group, an alkoxy group, an aryl group, or an aralkyl group; R8, R9, and R10 each independently represent a hydrogen atom, a halogen atom, a linear or branched alkyl group, an aralkyl group, an aryl group, —R11—O—R12, or —R13—CO—O—R14; R11 represents a linear or branched alkylene group; R12 represents a linear or branched alkyl group; R13 represents a single bond or a linear or branched alkylene group; and R14 represents a linear or branched alkyl group, an aryl group, or an aralkyl group, provided that at least two or more groups of R8, R9, and R10 represent a group other than a hydrogen atom.
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- Photochemical activities of n-nitroso carboxamides and sulfoximides and their application to DNA cleavage
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N-Nitroso compounds containing benzene, fluorene or fluorenone rings were synthesized. Photolysis of these compounds with 312-nm UV light provided the NO species, the presence of which was corroborated by use of an EPR method and of 2phenyl-4,4,5,5-tetramethylimidazolin-loxyl 3-oxide (PTIO) as a trapping agent. During irradiation of N-methylN-nitroso-9-fluorenone carboxamide (14c) in the absence of PTIO, it underwent decomposition followed by re-combination to give the heterocyclic nitric oxide radical 15. Incorporation of intercalating moieties endowed the Nnitroso compounds with DNA-cleaving ability through single-strand scission upon UV irradiation in a phosphate buffer (pH 5.0-8.0) under aerobic conditions.
- Hwu, Jih Ru,Huang, Joseph Jen Tse,Tsai, Fu-Yuan,Tsay, Shwu-Chen,Hsu, Ming-Hua,Hwang, Kuo Chu,Horng, Jia-Cherng,Ho, Ja An Annie,Lin, Chun-Cheng
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experimental part
p. 8742 - 8750
(2010/03/31)
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- Use of structure-based drug design approaches to obtain novel anthranilic acid acyl carrier protein synthase inhibitors
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Acyl carrier protein synthase (AcpS) catalyzes the transfer of the 4′-phosphopantetheinyl group from the coenzyme A to a serine residue in acyl carrier protein (ACP), thereby activating ACP, an important step in cell wall biosynthesis. The structure-based
- Joseph-McCarthy, Diane,Parris, Kevin,Huang, Adrian,Failli, Amedeo,Quagliato, Dominick,Dushin, Elizabeth Glasfeld,Novikova, Elena,Severina, Elena,Tuckman, Margareta,Petersen, Peter J.,Dean, Charles,Fritz, Christian C.,Meshulam, Tova,DeCenzo, Maureen,Dick, Larry,McFadyen, Iain J.,Somers, William S.,Lovering, Frank,Gilbert, Adam M.
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p. 7960 - 7969
(2007/10/03)
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- Synthesis and structural assignment of 2,4′-disubstituted benzylidenefluorenes and 4′-substituted benzylidene-1-azafluorenes
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In the course of a study aimed at the investigation of edge-to-face arene-arene interactions, substituted benzylidenefluorenes 8-16 and benzylidene-1-azafluorenes 20-24 were synthesized as mixtures of E-Z-isomers. The full structural assignment of these compounds, performed by 2D NMR experiments, is described together with a study of their E-Z isomerization under equilibrating conditions. For compounds 8-16 no correlation was observed between the electron-donating or electron-withdrawing nature of the substituent groups and the E/Z equilibrium ratios. In the case of 20-24 the predominance of the E-isomers seems to depend exclusively on the N-lone pair-benzylidene ring electronic repulsion rather than on the nature of the para substituent on the aromatic ring.
- Annunziata, Rita,Molteni, Valentina,Raimondi, Laura
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p. 520 - 528
(2007/10/03)
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- Synthesis and monolayer spreading behaviour of surface-active compounds containing electron- and hole-transporting groups. 1. Fluorenylidene derivatives
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Surface-active derivatives containing fluorenylidene groups were synthesized, with the goal of creating thin-film devices incorporating monolayers of electron-transporting materials.The new compounds were studied in monolayers at the air-water interface, and were further characterized by cyclic voltammetry.The spreading behaviour of long-chain esters of a fluorenylidene malononitrile carboxylic acid was relatively insensitive to the cross-sectional area of the hydrocarbon chain, but was more strongly affected by changes in the polarity of the hydrophilic groups.Conditions for Langmuir-Blodgett deposition of multilayers of two of the new compounds on titanium-coated polyester film were also explored.Key words: monolayers, Langmuir-Blodgett films, fluorene, surfactants
- Taylor, J. W.,Sloan, C. P.,Holden, D. A.,Kovacs, G. J.,Loutfy, R. O.
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p. 2136 - 2141
(2007/10/02)
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