Self-assembly of Polyfluorene Molecular Brushes with Poly(methacrylic acid) Side Chains in Ethanol and Water

Molecular brushes with long polyfluorene backbones and polymethacrylic acid side chains: Luminescent properties and self‐organization in solutions

“…Elongation of the backbone leads to an increase in the micelle size in comparison with the previously studied sample PF-g-PMAA. 36 The data in Table 3 shows that the method of curcumin- phthalocyanine complex, the quantum yield of singlet oxygen (in monomeric form) can be 50%-70%. 37 Also it was shown that phthalocyanine aggregates and micelles based on them can still exhibit photodynamic activity, in some cases in synergy with the photothermal and optoacoustic effects.…”

“…This behavior is similar to that observed in solutions of the polymer PF-g-PMAA with a short backbone and a high grafting density of side chains. 36 Unimolecular micelles are also formed in aqueous solutions of brush complexes with curcumin. Their size is practically independent of curcumin content.…”

“…35 Previously, polymer brushes with a PF main chain (number average molar mass M n = 8.2 Â 10 3 g mol À1 , dispersity index Ð = 2,4 for macroinitiator) and polymethacrylic acid side chains were prepared. 36 It was shown that grafting density has been proved to effect behavior of the brushes in dilute solutions. In particular, in the case of brushes with grafting density z = 75%, the formation of aggregates in the solution was observed, while in solutions of brushes with z = 92%, the monomolecular micelles with sizes of 50 nm were formed.…”

“…In particular, in the case of brushes with grafting density z = 75%, the formation of aggregates in the solution was observed, while in solutions of brushes with z = 92%, the monomolecular micelles with sizes of 50 nm were formed. 36 In this work, we synthesized the molecular brushes, which are similar to those described in structure and composition, but with a longer backbone (polymerization degree N bb > 40), as well as to study an effect of the length of the backbone on spectral characteristics and on micellization in solutions, including in the presence of a low molecular weight hydrophobic compound. Also, we studied the possibility of MPc-loaded nanomicelles formation, which are promising for the development of photosensitizers in cancer cells.…”

“…Previously, polymer brushes with a PF main chain (number average molar mass M n = 8.2 × 10 3 g mol −1 , dispersity index Ð = 2,4 for macroinitiator) and polymethacrylic acid side chains were prepared 36 . It was shown that grafting density has been proved to effect behavior of the brushes in dilute solutions.…”