Solubilization and Photochemical Stability of Octa[(4′-Benzo-15-Crown-5)Oxy]-Phthalocyanines in Aqueous Micellar Solutions

Supramolecular assemblies based on crown- and phosphoryl-substituted phthalocyanines and their metal complexes in microheterogeneous media

“…On the other hand, water is a good solvent for polymeric electrolytes and therefore (especially, for the system 1d-PSS-NaCl) the shape of the scattering particles can be close to elongated swollen (hydrated) coils (rings, reels) whose exponent equal to 5/3 is close to that observed in the SAXS experiment. 34 Almost no SAXS was observed from the microheterogeneous systems based on SDC-1d. 44 It follows that there are no noticeable concentrations of nanoparticles or that the nanoparticle size much exceeds the resolution of the instrument used (65 nm).…”

“…The behavior of compounds 1а and 1d in organized microheterogeneous systems suggests that monomerization of Pc in aqueous solutions is infl uenced by the structure and charges of anionic surfactants and polyelectrolytes. 34 Figure 6, а demonstrates how the EAS of aqueous solution containing aggregated metallophthalocyanine 1d and the simplest polyelectrolyte sodium poly-(styrene sulfonate), or PSS, changes with time. If in the case of anionic surfactants SDS and SDBS compound 1d exists in monomeric state in micellar solutions, 31,32 utilization of SDC and PSS requires that the ionic strength of the solution be increased by, e.g., adding NaCl.…”

“…Phthalocyanine 1а can also be dissolved in aqueous SDC solution; however, its absorption spectra correspond to mainly aggregated state of Pc both without and in the presence of SDC and NaCl. 34 Fluorescence appears only upon adding SDC to the solution of compound 1d. The fl uorescence intensity increases with the concentration of SDC and reaches a maximum value at [SDC] >> cmc in the presence of NaCl (Fig.…”

“…For instance, the particle size of compound 1а changed from 43 to 1-2 nm in the course of dissolutionThe state of microheterogeneous phthalocyanine-containing systems based on PSS was also studied by SAXS. 34 Almost no SAXS was observed for metallophthalocyanine 1d whose absorption spectrum corresponds to an aggregated, stable, and non-fl uorescent state. This result agrees with the published data 57 and confi rms the formation of a true solution.…”

“…Small-angle X-ray scattering curves of the samples PSS (1), PSS-NaCl (2), and 1d-PSS-NaCl (3) in the double logarithmic scale after subtraction of the buff er. Oscillations are an artifact resulting from low measurement statistics 34.…”