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Volumn 113, Issue 31, 2009, Pages 8852-8856

Anomalously selective quenching of S2 fluorescence from upper excited state of zinc 5-(l′-pyrenyl)-10,15,20-triphenylporphyrin derivatives through intramolecular charge transfer state

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE RECOMBINATIONS; CHARGE TRANSFER STATE; CHARGE-TRANSFER RATE; ELECTRON DENSITIES; ELECTRON DONOR-ACCEPTOR SYSTEMS; ELECTRON TRANSFER; ENERGY CHANGES; FLUORESCENCE QUENCHING; INTRA-MOLECULAR CHARGE TRANSFER; PENTAFLUOROPHENYL; PHOTOPHYSICAL PROPERTIES; POLAR SOLVENTS; PORPHYRIN MOIETIES; PYRENYL GROUP; SOLVENT POLARITY; ULTRAFAST ELECTRON TRANSFER;

EID: 68149136832     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp903743w     Document Type: Article
Times cited : (15)

References (41)
  • 1
    • 0001748542 scopus 로고
    • Distance Dependencies of Electron Transfer Reactions
    • Fox, M. A, Chanon, M, Eds, Elsevier: Amsterdam, The Netherlands, Chapter 1.4
    • (a) Wasielewski, M. R. Distance Dependencies of Electron Transfer Reactions. Photoinduced Electron Transfer; Fox, M. A., Chanon, M., Eds.; Elsevier: Amsterdam, The Netherlands, 1988; Chapter 1.4.
    • (1988) Photoinduced Electron Transfer
    • Wasielewski, M.R.1
  • 30
    • 0003066395 scopus 로고
    • Coordination Chemistry of Metalloporphyrins
    • Smith, K. M, Ed, Elsevier Scientific Publishing Company: New York, Chapter 5
    • Buchler, J. W. Static Coordination Chemistry of Metalloporphyrins. Porphyrins and Metalloporphyrins; Smith, K. M., Ed.; Elsevier Scientific Publishing Company: New York, 1975; Chapter 5.
    • (1975) Porphyrins and Metalloporphyrins
    • Buchler, J.1    Static, W.2
  • 33
    • 68149089273 scopus 로고    scopus 로고
    • The reduction potential of pyrene was estimated from the oxidation potential (1.44 V vs SCE) and the 0-0 band of absorption maximum (340 nm).
    • The reduction potential of pyrene was estimated from the oxidation potential (1.44 V vs SCE) and the 0-0 band of absorption maximum (340 nm).
  • 35
    • 68149115685 scopus 로고    scopus 로고
    • The CT state energy in solvent x (ECT)X was calculated from the following equation: equation represented where E 1/2, E1/2, e, εx, and εm are half-wave one-electron oxidation and reduction potentials in solvent m, the electronic charge, and the static dielectric constants of solvent x and m, respectively. The r por (6.2 Å) and the rpy (4.0 Å) are the effective ionic radius of porphyrin and pyrene, respectively. These values were obtained by the ab initio MO calculation at the Hartree-Fock 6-31G level. Distance a is the center-to-center distance between the porphyrin and the pyrene moieties (7.7 Å, The following values were used as static dielectric constants: 36.0 (acetonitrile, 25.2 (benzonitrile, 9.10 (dichloromethane, 2.38 (toluene, and 1.88 hexane
    • py (4.0 Å) are the effective ionic radius of porphyrin and pyrene, respectively. These values were obtained by the ab initio MO calculation at the Hartree-Fock 6-31G level. Distance "a" is the center-to-center distance between the porphyrin and the pyrene moieties (7.7 Å). The following values were used as static dielectric constants: 36.0 (acetonitrile), 25.2 (benzonitrile), 9.10 (dichloromethane), 2.38 (toluene), and 1.88 (hexane).
  • 41
    • 68149105633 scopus 로고    scopus 로고
    • The kf was roughly estimated to be 2.5 x 108 s-1 from the fluorescence quantum yield (Φ0 s2-s2) and the lifetime (to) of S2 state of zinc tetraphenylporphyrin derivatives in acetonitrile by the following equation: equation represented For the calculation, the values for Φ0 s2-s2 of ZnP and τ0 of zinc tetraphenylporphyrin τ0, 3.5 ps)9 were used. The kf was assumed to be the constant in all solvents for the calculation of the kET
    • ET.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.