
%0 Journal Article
%A Arnold, DP 
%A Bartley, JP 
%A James, DA 
%T Self-Aggregation of a Synthetic Amphiphilic Porphyrin
%J Australian Journal of Chemistry
%D 1992/08/01
%V 45
%N 8
%P 1191-1203
%K 
%R https://doi.org/10.1071/CH9921191
%U https://www.publish.csiro.au/paper/CH9921191 
%X The cationic amphiphile meso-tetrakis (1-octyloxycarbonylmethyl-4-pyridinio) porphyrin has been prepared by quaternization of tetra(4-pyridyl) porphyrin . Its self-aggregation into columnar face-to-face stacks is indicated by n.m.r. and electronic absorption spectra in chloroform and chloroform/methanol mixtures. In 10 mole % CD3OD/CDCl3 solution, concentration-dependent dimerization occurs, with an association constant Kd 5.81&#215;103 dm3 mol-1. In pure methanol, chemical shifts are concentration dependent, but do not fit a simple dimerization model. In water/methanol mixtures, aggregation occurs so that the hydrocarbon chains approach the porphyrin core, but the macrocycles do not stack in a face-to-face manner. 
