『徳島大学 教育・研究者情報データベース (EDB)』---[学外] /
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種別 (必須): 学術論文 (審査論文) [継承]
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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) [継承]
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)    [継承]
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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)    [継承]
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発行所 (推奨): 社団法人 日本化学会 [継承]
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 Japan
Title(ISO): Bull Chem Soc Jpn
Publisher: Chemical Society of Japan
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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) [継承]
URL (任意): http://ci.nii.ac.jp/naid/130004150204/ [継承]
DOI (任意): 10.1246/bcsj.72.103    (→Scopusで検索) [継承]
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CRID (任意): 1360283694081269376 [継承]
NAID : 130004150204 [継承]
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和文冊子 ● Itsuko Suzuki, Ryoko Tanaka, Akinori Yamaguchi, Shin-ichiro Maki, Hiroaki Misawa, Katsumi Tokumaru, Ryoichi Nakagaki and Hirochika Sakuragi : Behavior of Biradicals Generated from a Norrish Type-I Reaction of 2,2-Diphenylcycloalkanones. Chain-Length Dependence and Magnetic Field Effects, Bulletin of the Chemical Society of Japan, Vol.72, No.1, 103-113, 1999.
欧文冊子 ● Itsuko Suzuki, Ryoko Tanaka, Akinori Yamaguchi, Shin-ichiro Maki, Hiroaki Misawa, Katsumi Tokumaru, Ryoichi Nakagaki and Hirochika Sakuragi : Behavior of Biradicals Generated from a Norrish Type-I Reaction of 2,2-Diphenylcycloalkanones. Chain-Length Dependence and Magnetic Field Effects, Bulletin of the Chemical Society of Japan, Vol.72, No.1, 103-113, 1999.

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