Details

Autor(en) / Beteiligte

• Azenha, Emı́lia G.
• Serra, Arménio C.
• Pineiro, Marta
• Pereira, Mariette M.
• Seixas de Melo, J.
• Arnaut, Luis G.
• Formosinho, Sebastião J.
• Rocha Gonsalves, A.M.d'A.

Titel

Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins

Ist Teil von

• Chemical physics, 2002-06, Vol.280 (1), p.177-190

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2002

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• The photophysics of halogenated and metallated tetrakisphenylporphyrins is investigated using single-photon counting, photoacoustic calorimetry and luminescence techniques. The radiationless transition rates in these and related molecules are interpreted with a quantum-mechanical tunnelling model modified to include the effect of spin–orbit coupling in the intersystem crossing rates. It is shown that tetrakisphenylporphyrins with halogens in the ortho positions have long-lived triplet states that are formed in high yields.