Photophysical and photocatalytic behavior of cobalt(III) 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin

Melinda A. Fodor, O. Horváth, L. Fodor, Günter Grampp, Alexander Wankmüller

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Although kinetically inert cationic Co(III)TMPyP5+ (H2TMPyP4+ = 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin) was considered earlier to be very weakly emissive, both the spectrum and the lifetime of its fluorescence could be determined. Besides, this complex proved to be favorable for outer-sphere photoinduced reduction of the metal center in the presence of triethanolamine (TEOA) as electron donor quenching the triplet excited state of this metalloporphyrin. The corresponding cobalt(II) porphyrin formed in this way was also photoactive; it forwarded an electron to a suitable acceptor (e.g., methylviologen) upon irradiation, regenerating the starting complex. Hence, this system may be a candidate for hydrogen generation from water by the utilization of visible light.

Original languageEnglish
Pages (from-to)110-112
Number of pages3
JournalInorganic Chemistry Communications
Volume50
DOIs
Publication statusPublished - 2014

Fingerprint

Porphyrins
Cobalt
porphyrins
cobalt
Metalloporphyrins
Triethanolamine
Electrons
Excited states
Hydrogen
Quenching
electrons
Metals
Fluorescence
quenching
Irradiation
life (durability)
fluorescence
irradiation
Water
hydrogen

Keywords

  • Cobalt(III) porphyrin
  • Fluorescence
  • Photocatalysis
  • Triplet state
  • Water-soluble

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Photophysical and photocatalytic behavior of cobalt(III) 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin. / Fodor, Melinda A.; Horváth, O.; Fodor, L.; Grampp, Günter; Wankmüller, Alexander.

In: Inorganic Chemistry Communications, Vol. 50, 2014, p. 110-112.

Research output: Contribution to journalArticle

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AU - Horváth, O.

AU - Fodor, L.

AU - Grampp, Günter

AU - Wankmüller, Alexander

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AB - Although kinetically inert cationic Co(III)TMPyP5+ (H2TMPyP4+ = 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin) was considered earlier to be very weakly emissive, both the spectrum and the lifetime of its fluorescence could be determined. Besides, this complex proved to be favorable for outer-sphere photoinduced reduction of the metal center in the presence of triethanolamine (TEOA) as electron donor quenching the triplet excited state of this metalloporphyrin. The corresponding cobalt(II) porphyrin formed in this way was also photoactive; it forwarded an electron to a suitable acceptor (e.g., methylviologen) upon irradiation, regenerating the starting complex. Hence, this system may be a candidate for hydrogen generation from water by the utilization of visible light.

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