Bansal, Ashu-Kumar and Holzer, Wolfgang and Penzkofer, Alfons and Tsuboi, Taiju (2006) Absorption and emission spectroscopic characterisation of Platinum-Octaethyl-Porphyrin (PtOEP). Chemical Physics 330 (1-2), pp. 118-129.
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The absorption and emission spectroscopic behaviour of the platinum complexed porphyrin PtOEP (platinum-octaethyl-porphyrin) is studied at room temperature. Liquid solutions, doped films, and a neat film are investigated. The absorption cross-section spectra including singlet–triplet absorption, the triplet–singlet stimulated emission cross-section spectra, the phosphorescence quantum distributions, the phosphorescence quantum yields, and the phosphorescence signal decays are determined. In the neat film a red-shifted phosphorescent excimer emission is observed. In diluted solid solution (polystyrene and dicarbazole-biphenyl films) as well as in de-aerated liquid solutions (tetrahydrofuran, toluene, chloroform) high phosphorescence quantum yields are obtained. In air-saturated liquid solutions, the phosphorescence efficiency is reduced by oxygen quenching. At intense short-pulse laser excitation the phosphorescence lifetime is shortened by triplet–triplet annihilation. No amplification of spontaneous emission was observed.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Alfons Penzkofer|
|Keywords:||Organometallic complex; PtOEP; Platinum-octaethyl-porphyrin; Doped film; Neat film; Liquid solutions; Phosphorescence quantum yield; Phosphorescence lifetime; Singlet–triplet absorption; Stimulated emission cross-section; Triplet–triplet annihilation; Amplified spontaneous emission|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||20 Jul 2011 21:04|