Peculiar photoinduced properties of water-soluble, early lanthanide(III) porphyrins

Muhammad Imran, Csanád Szentgyörgyi, Gábor Eller, Zsolt Valicsek, O. Horváth

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Water-soluble, early lanthanide(III) mono- and bisporphyrin complexes possess very similar UV-Vis absorption as well as photophysical and photochemical properties, as a consequence of a special type of aggregation, through the peripheral substituents. In the absence of the bidentate, O-donor acetate ligand, bisporphyrin can form too, which has slightly redshifted and broadened absorption bands, compared to those of the monoporphyrin. Also the bisporphyrin displays a blueshifted and less intense fluorescence, related to the free-base porphyrin. The formation of complexes and the transformation between the mono- and bisporphyrins are very slow reactions in dark at room temperature. These reactions are accelerated by the photolysis of the system, which are considerable by-processes of the photoredox degradation. Depending on the wavelength of irradiation, two types of photoproducts can appear: during the photolysis at the Soret-band, a radical type intermediate can be observed, which disappears in dark. However, during the irradiation at the Q-bands, a new photoproduct appears, which is stable in dark and undetectable in the case of post-transition metal ions' out-of-plane porphyrin complexes.

Original languageEnglish
Pages (from-to)60-63
Number of pages4
JournalInorganic Chemistry Communications
Volume52
DOIs
Publication statusPublished - 2015

Fingerprint

Lanthanoid Series Elements
Porphyrins
Photolysis
Rare earth elements
porphyrins
photolysis
Irradiation
irradiation
Water
water
Transition metals
Metal ions
Absorption spectra
acetates
metal ions
Acetates
Agglomeration
Fluorescence
transition metals
Ligands

Keywords

  • Charge separation
  • Early lanthanide(III) ions
  • LMCT
  • Out-of-plane metalloporphyrins
  • Tail-to-tail oligomerization
  • Water cleavage

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Peculiar photoinduced properties of water-soluble, early lanthanide(III) porphyrins. / Imran, Muhammad; Szentgyörgyi, Csanád; Eller, Gábor; Valicsek, Zsolt; Horváth, O.

In: Inorganic Chemistry Communications, Vol. 52, 2015, p. 60-63.

Research output: Contribution to journalArticle

Imran, Muhammad ; Szentgyörgyi, Csanád ; Eller, Gábor ; Valicsek, Zsolt ; Horváth, O. / Peculiar photoinduced properties of water-soluble, early lanthanide(III) porphyrins. In: Inorganic Chemistry Communications. 2015 ; Vol. 52. pp. 60-63.
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