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Affiliation(s)
- Mohie E. M. Zayed
- Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Parveen Kumar
- Department of Chemistry, DAV College, Faridabad, India
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Abstract
Photophysical processes involving the higher electronic excited states of diamagnetic porphyrins and metalloporphyrins are critically reviewed. Intramolecular electronic relaxation of one-photon Soret-excited molecules in solution is now known to involve processes other than S 2 - S 1 internal conversion; dark electronic states are implicated. Sequential two-photon excitation to produce gerade excited singlet states ( S n , n > 2) results in relaxation dynamics that are quantitatively different from those resulting from one-photon excitation to ungerade states of about the same energy. Intermolecular electron and electronic energy transfer involving Soret-excited metalloporphyrins and intramolecular electron and electronic energy transfer in Soret-excited dyads and larger arrays containing porphyrins are reviewed. Metalloporphyrins containing main group metals or transition metals with filled d orbitals exhibit relaxation dynamics that differ from metalloporphyrins containing transition metals with unfilled d orbitals. Non-linear phenomena associated with multi-photon excitation of diamagnetic metalloporphyrins are also reviewed.
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Affiliation(s)
- Umakanta Tripathy
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Ronald P. Steer
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada
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Maiti M, Danger BR, Steer RP. Photophysics of Soret-Excited Tetrapyrroles in Solution. IV. Radiationless Decay and Triplet−Triplet Annihilation Investigated Using Tetraphenylporphinato Sn(IV). J Phys Chem A 2009; 113:11318-26. [DOI: 10.1021/jp906966h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manisankar Maiti
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada
| | - Brook R. Danger
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada
| | - Ronald P. Steer
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada
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Pereira MR, Ferreira JA, Hungerford G. Photophysics of mesoporphyrin IX in solution and confined in sol–gel-derived matrices. J Photochem Photobiol A Chem 2005. [DOI: 10.1016/j.jphotochem.2004.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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