π-π Aggregation in metalloporphyrins: Causative factors
The strength of aggregation in PdII, NiII, Zn II, and CdII metalloporphyrins is shown by n.m.r. spectroscopy to depend upon interaction of the metal ion with the porphyrin π-system; within a selected series of 2,4-disbustituted deuteroporphyrin-IX dimethyl esters complexed with a constant metal ion the aggregation is further enhanced by the presence of electron-withdrawing substituents on the porphyrin periphery.
Publication Source (Journal or Book title)
Journal of the Chemical Society, Chemical Communications
Abraham, R., Eivazi, F., Pearson, H., & Smith, K. (1976). π-π Aggregation in metalloporphyrins: Causative factors. Journal of the Chemical Society, Chemical Communications (17), 699-701. https://doi.org/10.1039/C39760000699