90731-31-0Relevant academic research and scientific papers
INTERACTION BETWEEN PORPHYRINS AND HYDROXYLATED COMPOUNDS. PART 1. STUDY OF TETRAPHENYLPORPHYRIN FREE BASE AND ITS N-METHYL DERIVATIVES IN THE PRESENCE OF p-NITROPHENOL
Guilleux, Laure,Krausz, Pierre,Nadjo, Louis,Uzan, Raoul,Giannotti, Charles
, p. 475 - 480 (2007/10/02)
The complexation of tetraphenylporphyrin free base (PI) and its N-methyl (PII) and NaNb-dimethyl (PIII) derivatives by p-nitrophenol is studied by u.v.-visible and i.r. spectroscopy in benzene and dichloromethane.PI and PII form a 2:1 and a 1:1 complex, respectively, with p-nitrophenol through intermolecular hydrogen bonding in benzene and an undissociative ion pair in dichloromethane.A study of the porphyrin concentration in the presence of excess of p-nitrophenol shows, in CH2Cl2, a self-association of PI, which is described as the dimerization of the monocomplexed ion-pair species.Equilibrium constants are determined for several complexation reactions as well as for the dimerization process.
