ASSOCIATION OF CHLOROPHYLL WITH AMIDES PLASTICIZED POLYETHYLENE PARTICLES: II. THE ISOMERIC N-PYRIDYLMYRISTAMIDES.

Article abstract of DOI:10.1246/bcsj.56.1598

When chlorophyll, together with certain other amphiphilic substances, is adsorbed to particles of polyethylene plasticized by incorporation of tetradecane, it is maintained in monomeric or oligomeric forms with characteristic absorption and fluorescence spectra. This work describes the properties of chlorophyll a on such particles in the presence of the three isomeric N-pyridylmyristamides, and of the similarly shaped but not basic compound myristanilide, in an effort to ascertain the structural factors governing associations of these species. Absorption and fluorescence spectra at room temperature are resolved into minimal sets of Gaussian components, and relations and fluorescence spectra at room temperature are resolved into minimal sets of Gaussian components, and relations between the component sets are proposed. The positions of the component bands and their relative abundance are characteristic of the amide used. The 3- and 4-pyridyl isomers bind more strongly to chlorophyll, probably by ligation of the pyridine nitrogen to Mg of the pigment.