Abstract:
:In aqueous solution, amphiphilic ionenes such as the [3,22]-ionene spontaneously adopt globular conformations and form microdomains that are highly micelle-like, i.e. are capable of solubilizing organic molecules, binding and exchanging counterions and accelerating or inhibiting the rates of bimolecular reactions. Time-resolved fluorescence decay of pyrene and pyrene derivatives solubilized in these microdomains at concentrations where excimer formation occurs show that even water-insoluble probes can migrate between the hydrophobic microdomains formed in aqueous solution by a [3,22]-ionene chloride (with the N-terminal groups quaternized with benzyl chloride). Time-resolved studies of the quenching of pyrene fluorescence by alkylpyridine derivatives revealed similar behavior. The observed quenching behavior requires that the migration be between microdomains on the same ionene chain or same group of associated ionene chains and is consistent with migration dominated by fusion/fission transport of the probe and quencher.
journal_name
Photochem Photobioljournal_title
Photochemistry and photobiologyauthors
Tcacenco CM,Quina FHdoi
10.1562/2006-09-09-RA-1036subject
Has Abstractpub_date
2007-05-01 00:00:00pages
542-6issue
3eissn
0031-8655issn
1751-1097pii
PHP102journal_volume
83pub_type
杂志文章abstract::There is a need to improve the selectivity of photodynamic therapy and for better targeting of tumor cells within specific tumor compartments. Selective in vitro phototoxicity of a human bladder carcinoma cell line 647V has been achieved by targeting sulfonated aluminum phthalocyanines (AlSPc) with monoclonal antibodi...
journal_title:Photochemistry and photobiology
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doi:10.1111/j.1751-1097.1994.tb05139.x
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journal_title:Photochemistry and photobiology
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pub_type: 杂志文章
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journal_title:Photochemistry and photobiology
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journal_title:Photochemistry and photobiology
pub_type: 杂志文章
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