Abstract
Tetrakis (4-carboxyphenyl) porphyrin (TCPP) and polyelectrolyte poly(N-methyl-2-vinylpyridinium iodide)-b-poly(ethylene oxide) (PMVP41-b-PEO205) can self-aggregate into polyion complex (PIC) micelles in alkaline aqueous solution. UV-vis spectroscopy, fluorescence spectroscopy, transmission electron microscope, and dynamic light scattering were carried out to study PIC micelles. Density functional theory (DFT) calculation method was applied to study the interaction of TCPP and PMVP41-b-PEO205. We found that the H-aggregates and J-dimers of anionic TCPP transformed in PIC micelles. H-aggregates of TCPP formed at the charge ratio of TCPP/PMVP41-b-PEO205 1:2 and J-dimer species at the charge ratio above 1:4, respectively. It is worth noting that the transformation from H-aggregates to J-dimer species of TCPP occurred just by adjusting the ratio of polymer and TCPP rather than by changing other factors such as pH, temperature, and ions.
Highlights
Water-soluble porphyrins have stimulated tremendous research attention owing to their potential applications in medical science, electronic equipment, biomimetic chemistry, and materials chemistry [1,2,3,4]
Shi and co-workers have reported that the dimer and monomer of FeIII -tetra(4-sulfonatophenyl)-porphyrin (FeIII TPPS) aggregated to form complex micelles when they adjusted the pH value [10]
Tetrakis (4-carboxyphenyl) porphyrin is a well-researched dye due to its ability to self-aggregate into dimer species, J-aggregates, or H-aggregates driven by non-covalently interactions
Summary
Water-soluble porphyrins have stimulated tremendous research attention owing to their potential applications in medical science, electronic equipment, biomimetic chemistry, and materials chemistry [1,2,3,4]. Tetrakis (4-carboxyphenyl) porphyrin is a well-researched dye due to its ability to self-aggregate into dimer species, J-aggregates (side-by-side arrangement), or H-aggregates (face-to-face arrangement) driven by non-covalently interactions. Some factors, such as a certain pH, changeable ionic strength, different solvents, temperature, and polymer template [11,12,13,14,15,16,17], have been reported to exert significant effects on the transformation of TCPP aggregates. The component that is incorporated in the micellar core is well
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