463347-00-4Relevant academic research and scientific papers
Heavy-atom effects on metalloporphyrins and polyhalogenated porphyrins
Azenha, Emília G.,Serra, Arménio C.,Pineiro, Marta,Pereira, Mariette M.,Seixas de Melo,Arnaut, Luis G.,Formosinho, Sebasti?o J.,Rocha Gonsalves
, p. 177 - 190 (2002)
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.
