Synthesis, photophysical studies and 1O2 generation of carboxylate-terminated zinc phthalocyanine dendrimers

Highly water-soluble dendrimers have been prepared consisting of a central zinc phthalocyanine moiety and dendritic wedges with terminal carboxylate groups. The biggest polyelectrolyte comprises 32 negative charges at the dendrimer surface. The photophysical studies reveal a strong correlation betwe...

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Bibliographic Details
Published in:Journal of inorganic biochemistry 2014-07, Vol.136, p.170-176
Main Authors: Setaro, Francesca, Ruiz-González, Rubén, Nonell, Santi, Hahn, Uwe, Torres, Tomás
Format: Article
Language:English
Subjects:
Dendrimers
Dendrimers - chemistry
Indoles - chemistry
Organometallic Compounds - chemistry
Oxidants, Photochemical - chemistry
Oxidation-Reduction
Photosensitizing Agents - chemistry
Phthalocyanines
Singlet Oxygen - chemistry
Singlet oxygen generation
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Summary:Highly water-soluble dendrimers have been prepared consisting of a central zinc phthalocyanine moiety and dendritic wedges with terminal carboxylate groups. The biggest polyelectrolyte comprises 32 negative charges at the dendrimer surface. The photophysical studies reveal a strong correlation between the degree of dendritic environment, the extent of aggregation, and the ability to generate singlet oxygen in aqueous media. Compared to dendrimers having an axial derivatization the functionalization on the outer rim also significantly improves the phthalocyanine's ability to photosensitize singlet oxygen. Highly water-soluble dendrimers able to generate singlet oxygen in aqueous media have been prepared consisting of a central zinc phthalocyanine moiety and dendritic wedges with terminal carboxylate groups. [Display omitted]
ISSN:0162-0134
1873-3344
DOI:10.1016/j.jinorgbio.2014.02.007