| ○種別 (必須): | □ | 学術論文 (審査論文)
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| ○組織 (推奨): | 1. | 徳島大学.工学研究科.エコシステム工学専攻.資源循環工学講座 (〜2014年3月31日)
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| ○著者 (必須): | 1. | (英) Suzuki Itsuko (日) (読)
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| 2. | (英) Tanaka Ryoko (日) (読)
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| 3. | (英) Yamaguchi Akinori (日) (読)
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| 4. | (英) Maki Shin-ichiro (日) (読)
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| 5. | 三澤 弘明 ([北海道大学])
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| 6. | (英) Tokumaru Katsumi (日) (読)
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| 7. | (英) Nakagaki Ryoichi (日) (読)
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| 8. | (英) Sakuragi Hirochika (日) (読)
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| ○題名 (必須): | □ | (英) Behavior of Biradicals Generated from a Norrish Type-I Reaction of 2,2-Diphenylcycloalkanones. Chain-Length Dependence and Magnetic Field Effects (日)
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| ○要約 (任意): | □ | (英) The reaction course of acyl-diphenylmethyl biradicals (α-oxo-ω,ω-diphenyl-α,ω-alkanediyl biradicals), O=C↑-(CH2)n-2-C↑Ph2 (3BR-n), generated from the Norrish type-I reaction of 2,2-diphenylcycloalkanones (CK-n) with various ring sizes in methanol, is switched from intramolecular disproportionation (n = 6, 7), giving a diphenylalkenal, to acyl-phenyl recombination (n ≥ 9), affording a cyclophane derivative. The behavior of 3BR-9 derived from CK-9 was studied in detail; the photolysis of CK-9 afforded an open-chain and a cyclic decarbonylation product together with an unsaturated aldehyde and a 4-methylene-2,5-cyclohexadienyl ketone (a pre-cyclophane). The photolysis of this ketone gave the same products that arose from the photolysis of CK-9, presenting the possibility that the decarbonylation products and a part of the aldehyde are formed as secondary products during irradiation. The magnetic field dependence of the lifetimes of 3BR-n (n = 12 and 13) generated from CK-12 and 13, respectively, was measured in methanol by means of a pulsed-laser excitation technique. The rate constants for intersystem crossing showed a maximum at a relatively low field strength, which decreased with increasing the field strength to level off to an asymptotic value at > 1.5 kG. The results show that the role of hyperfine coupling in intersystem crossing is less important in these systems, presumably because of the presence of a carbonyl oxygen and the absence of a hydrogen atom at the radical center. (日)
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| ○発行所 (推奨): | □ | 社団法人 日本化学会
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| ○誌名 (必須): | □ | Bulletin of the Chemical Society of Japan ([社団法人 日本化学会])
(pISSN: 0009-2673, eISSN: 1348-0634)
| ○ISSN (任意): | □ | 0009-2673
ISSN: 0009-2673
(pISSN: 0009-2673, eISSN: 1348-0634) Title: Bulletin of the Chemical Society of JapanTitle(ISO): Bull Chem Soc JpnPublisher: Oxford University Press (NLM Catalog)
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| ○巻 (必須): | □ | 72
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| ○号 (必須): | □ | 1
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| ○頁 (必須): | □ | 103 113
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| ○年月日 (必須): | □ | 西暦 1999年 1月 1日 (平成 11年 1月 1日)
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| ○URL (任意): | □ | http://ci.nii.ac.jp/naid/130004150204/
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| ○DOI (任意): | □ | 10.1246/bcsj.72.103 (→Scopusで検索)
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| ○CRID (任意): | □ | 1360283694081269376
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| ○NAID : | □ | 130004150204
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