title: Self-assembly of synthetic zinc chlorins in a silicate micelle prepared by sol-gel process.
abstract: Zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide-a (1), a good model compound of light-harvesting pigments of green photosynthetic bacteria, formed self-aggregates in the presence of octadecyltriethoxysilane and tetraethoxysilane in an aqueous solution to exhibit visible absorption spectra similar to the natural antenna. Base-catalyzed cross-linked polymerization of the additive Si-ORs (R=ethyl and H) afforded the formation of a siloxane network (Si-O-Si) on the surface of the self-assemblies of 1. The resulting microcapsules were stable to tolerate the deaggregation to monomeric 1 by addition of surfactant Triton X-100 more largely than the corresponding micelles before polymerization.
authors.affiliation: Department of Bioscience and Biotechnology, Faculty of Science and Engineering, Ritsumeikan University, Kusatsu, 525-8577, Shiga, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Saga
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Miyatake
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Tamiaki
mesh_terms: D008823:Micelles; D017830:Octoxynol / Q000737:chemistry; D011166:Porphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D013057:Spectrum Analysis; D015032:Zinc / Q000737:chemistry*
chemical_list: D008823:Micelles; D011166:Porphyrins; D017640:Silicates; C006969:chlorin; D017830:Octoxynol; D015032:Zinc