Electrogenerated chemiluminescence. XVI. ECL of palladium and platinum α,β,γ,δ-tetraphenylporphyrin complexes

The electrochemistry of the Pt(II) and Pd(II) complexes with α,β,γ,δ-tetraphenylporphin (TPP) in dichloromethane solutions containing 0.1 M tetra-n-butylammonium perchlorate is characterized by one-electron transfers to form both oxidized and reduced species. The electron transfer reactions between these electrogenerated species lead to the emission of light. The radiating species has been identified as the lowest triplet state of the Pt(TPP) or Pd(TPP) by comparison with results of previous spectroscopic studies.