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- W2113896309 abstract "Abstract The entanglement process between water‐soluble 5,10,15,20‐tetrakis(4‐sulfonatophenyl)‐21 H ,23 H ‐porphine and the amphiphilic cyclodextrin (CD) heptakis(2‐ω‐amino‐ O ‐oligo(ethylene oxide)‐6‐hexylthio)‐β‐CD and the occurrence of various species at different porphyrin:CD ratios were studied by a combination of UV/Vis absorption, fluorescence anisotropy, time‐resolved fluorescence, resonance light scattering, and circular dichroism. The effect of the entanglement process on the mean vesicle diameter was investigated over a wide concentration range by quasielastic light‐scattering techniques. The experimental results indicate that the presence of porphyrins in this colloidal system promotes some structural rearrangements, essentially driven by charge interaction, which are responsible for a sensitive change of vesicle dimensions. In the range of porphyrin:CD molar ratios between 1:10 and 1:50, the porphyrin is solubilized in monomeric form ( τ 1 =11.5 ns) and photosensitizes the production of singlet oxygen ( 1 O 2 ). At the same molar ratio the ability of this amphiphilic cyclodextrin to transport porphyrins into tumor cells indicates specificity at the nuclear‐compartment level. These findings may be of potential interest for the of development agents for photodynamic therapy of tumors." @default.
- W2113896309 created "2016-06-24" @default.
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- W2113896309 date "2003-12-05" @default.
- W2113896309 modified "2023-10-17" @default.
- W2113896309 title "Novel Heterotopic Colloids of Anionic Porphyrins Entangled in Cationic Amphiphilic Cyclodextrins: Spectroscopic Investigation and Intracellular Delivery" @default.
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- W2113896309 doi "https://doi.org/10.1002/chem.200304861" @default.
- W2113896309 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/14673846" @default.