全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Shoji Fujisawa , Shigeru Ohshima ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 1996, Vol.11 (1-4), pp.267-273Taylor & Francis
摘要:Dibenzo[def,i]naphtho[vwx-1,8,7]pyranthrene (12), a new dodecacyclic aromatic hydrocarbon is synthesized by the condensation reaction of a 1:1 mixture of 7H-benz[hi]chrysene-7-one (7) and 13H-dibenz[a,de]anthracene-13-one (8) with zinc dust in the presence of zinc chloride a...
作者:Shoji Fujisawa , Minoru Takekawa ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 1999, Vol.14 (1-4), pp.99-108Taylor & Francis
摘要:Dibenzo[h,rst]naphtho[8,1,2-cde]pentaphcne (9) has been synthesized by the condensation of a mixture of 1-phcnalenone (1) and 13H-dibenz[a,de]anthracene-13-one (2) with zinc dust in the presence of ZnCl2 and NaCl. On the other hand, dibenz[a,lmn]anthra[1,2,9-hij]perylene (17) has...
作者:Shoji Fujisawa , Minoru Takekawa ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.249-258Taylor & Francis
摘要:The relation between the yields of three isomers of violanthrone--violanthrone A (VOA), violanthrone B (VOB), and isoviolanthrone A (isoVOA)--and the condition of the alkali fusion of benzanthrone have been studied. When the method of alcoholic alkali fusion was applied to benzan...
作者:Shoji Fujisawa , Minoru Takekawa ...
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.249-258Taylor & Francis
摘要:The relation between the yields of three isomers of violanthrone--violanthrone A (VOA), violanthrone B (VOB), and isoviolanthrone A (isoVOA)--and the condition of the alkali fusion of benzanthrone have been studied. When the method of alcoholic alkali fusion was applied to b...
作者:... Shigeru Ohshima , Isao Oonishi , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 1996, Vol.11 (1-4), pp.305-311Taylor & Francis
摘要:The photooxygenation of tetrabenzo[a,cd,j,lm]perylene (TBP) and tribenzo[a,h,rst]phenanthra[10,1,2-cde]pentaphene (TBPP) due to exposure to visible-light was investigated by measuring the absorption spectra and applying semi-empirical molecular orbital methods. Regardless of simi...
作者:... Shigeru Ohshima , Minoru Takekawa , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 1999, Vol.14 (1-4), pp.77-86Taylor & Francis
摘要:Complete assignments of NMR spectra were made for benzanthrones, using 2D correlation spectroscopic techniques of homonuclear H-H COSY and NOESY and heteronuclear CH-COSY and COLOC methods. The nitration positions for 6H-benzo[cd] pyren-6-one (1), 13H-dibenzo[a, de]anthracen-13-o...
作者:... Akira Uchida , Isao Oonishi , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 1999, Vol.14 (1-4), pp.33-42Taylor & Francis
摘要:The fluorescence spectra of three isomeric dibenzoanthrones, 13H-dibenzo[a, de]anthracen-13-one (1), 13H-benzo[hi]chrysen-13-one (2), and 7H-dibenzo[a, kl]anthracen-7-one (3), in an ethanol-ethertoluene mixed solution were measured as a function of the sample temperature (T). The...
作者:... Rie Yagi , Minoru Takekawa , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2000, Vol.19 (1-4), pp.155-164Taylor & Francis
摘要:Benz[a]anthracene-7, 12-dione (1) was nitrated directly by nitric acid and a nitro-derivative (2) was obtained. Molecular orbital calculation predicted that the nitration reaction occurs in the C1 or C4 position of (1). To determine the position of the nitro group of (2), NM...
作者:... Shigeru Ohshima , Isao Oonishi , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2000, Vol.19 (1-4), pp.189-197Taylor & Francis
摘要:Nitration of three isomeric dibenzanthrones, 13H-dibenzo[a,de]-anthracene-13-one(3), 7H-benzo[hi]chrysene-7-one(4), and 7H-dibenzo[a,kl]anthracene-7-one(5), with concentrated nitric acid was studied under various conditions. The nitration of (3) at 15 °C in 1,1,2,2-tetrachlo...
作者:... Yasuto Fujimaki , Minoru Takekawa , Shoji Fujisawa
来源:[J].Polycyclic Aromatic Compounds(IF 1.044), 2002, Vol.22 (3-4), pp.289-293Taylor & Francis
摘要:We have synthesized undecacyclic aromatic hydrocarbons using condensation of dibenzoanthrones. For example, dibenzo[ a,o ]dinaphtho[3,2,1- cd ;1,2,3- lm ]perylene, diphenanthra[1,2,3- cd ; 3,2,1- lm ]perylene and diphenanthra[2,3,4- cd ;4,3,2- lm ]perylene were produced from...

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