338972-34-2Relevant academic research and scientific papers
One-pot electrochemical generation of a porphyrin dimer with a bis(diphenylphosphonium)acetylene bridge
Ruhlmann, Laurent,Giraudeau, Alain
, p. 2007 - 2008 (1996)
The electrochemical oxidation of zinc tetraphenylporphyrin in the presence of bis(diphenylphosphino)acetylene leads to the formation of a β-bridged dimer using 0.5 equiv. of Lewis base per mole of [Zn(tpp)]; a mixture of monomer and dimer is observed when stoichiometric amounts or an excess of diphosphine was used.
A first series of dimeric porphyrins electrochemically linked with diphosphonium bridges
Ruhlmann, Laurent,Giraudeau, Alain
, p. 659 - 668 (2007/10/03)
The synthesis of dimeric porphyrins with a diphosphonium bridge in a direct one-pot electrochemical reaction is reported. The variation in the yields of this coupling reaction depends on the conditions of the electrolysis, and was examined mainly with respect to the detected by-products. An interpretation of this selective formation of dimers is proposed. Monomers and trimers were also obtained. These new compounds were characterized by 1H NMR, 31P NMR, UV/Vis spectroscopy and microanalysis. Important excitonic interactions were observed when the two porphyrin chromophores were linked with a short diphosphonium bridge. The NMR-spectroscopic data suggest that isomers are present in solution. Electrochemical data indicate that the two phosphonium groups of the bridge are not electrochemically independent in the zinc dimers.
