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A stable 1:1 host-guest complex is formed between a silicon(IV) phthalocyanine conjugated axially with two permethylated beta-cyclodextrin units and a tetrasulfonated porphyrin. The complex exhibits a light-harvesting property and works as an efficient photosensitizing system, killing HT29 human colon adenocarcinoma cells with an IC50 value of 0.09 microM. [structure: see text].
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Leng et al. (2006) studied this question.
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