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  • 1995-1999  (2)
  • 1990-1994  (2)
  • Absorption and emission spectra of porphyrin-quinone cyclophanes  (2)
  • Syntheses  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Photoinduced electron transfer in porphyrin-quinone cyclophanes, 7. Porphyrin-quinone cyclophanes with gradually varied acceptor strength: Physical properties related to electron transfer (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 2303-2310 
    Details
    ISSN: 0009-2940
    Keywords: Porphyrin-quinone cyclophanes ; Photoinduced electron transfer in porphyrin-quinone cyclophanes ; Absorption and emission spectra of porphyrin-quinone cyclophanes ; Redox potentials and electron transfer in intramolecular porphyrin-quinone systems ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Absorption and emission spectra of the doubly quinone-bridged porphyrin cyclophanes 1-4 with gradually varied acceptor strength as well as of the single-bridged analogues 5-9 and 10-13 are reported. Reduction and oxidation potentials of these intramolecular porphyrin-quinone systems have been determined. Based on these data, fluorescence quenching as well as time-resolved fluorescence lifetime measurements are discussed in terms of photoinduced electron transfer to the charge-separated zwitterionic state.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921251018
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Syntheses and Properties of New Quinone-Bridged Diphenyl- and Tetraphenylporphyrins (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 223-229 
    Details
    ISSN: 0009-2940
    Keywords: Porphyrin-quinone cyclophanes ; Photoinduced electron transfer ; Absorption and emission spectra of porphyrin-quinone cyclophanes ; Photosynthesis models ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Syntheses and spectroscopic properties of the porphyrin-quinone cyclophanes 1, 2 and 3 of which structural and/or conformational studies have recently reported[1] are described. Physical properties related to photoinduced electron-transfer reactions like redox potentials, absorption and emission spectra were determined for these compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941270132
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Pyromellitic Diimide-Porphyrin Cyclophanes: Syntheses, Transannular Interactions, and Structure Analysis (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 1459-1470 
    Details
    ISSN: 1434-193X
    Keywords: Cyclophanes ; Donor-acceptor systems ; Syntheses ; Conformation analysis ; X-ray structure analysis ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -The acceptor-porphyrin cyclophanes 2 and 4 with pyromellitic diimide (1) as strong electron-acceptor, and the corresponding porphyrin zinc complexes 3 and 5 were prepared by a route which differs considerably from that in the syntheses of previously prepared electron-acceptor porphyrin cyclophanes. The conformations of these electron-acceptor-porphyrin cyclophanes are discussed based on 1H-NMR and the X-ray structural analysis of 2. According to the results obtained, the plane of 1 and that of the porphyrin unit (at least in the crystalline state) are neither close nor parallel to each other. An unusual dihedral orientation of the donor and acceptor planes was detected for 2.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Distance Dependence of Photoinduced Electron Transfer: Syntheses and Properties of Anthracene-Spacered Porphyrin-Quinone Cyclophanes (1998)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1998 (1998), S. 631-642 
    Details
    ISSN: 1434-193X
    Keywords: Electron transfer, distance dependence of ; Anthracene-spacered porphyrin-quinone cyclophanes ; Syntheses ; Characterizations ; Structures ; Physical properties ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In our previous work on benzene- and naphthalene-spacered porphyrin-quinone cyclophanes[1][2], the dependence of electron-transfer rates on reduction potentials of the acceptors and oxidation potentials of the porphyrins was studied. The present paper, dealing with the distance dependence of electron transfer, reports on the synthesis of anthracene-spacered analogues and on the electron-transfer rates, which are found to be drastically reduced.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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