A novel Frétchet structural dendritic substituted photosensitizer, tetra-{3,5-di-[3,5-di-(4-carboxylic benzyloxy)benzyloxy]benzyloxy} phthalocyanine zinc(II) (6), was synthesized by the following steps. Firstly, 3,5-di-(4-cyanobenzyloxy) benzyl alcohol (1) was obtained by reaction of 3,5-di-hydroxybenzyl alcohol with p-cyanobenzylbromide. Then, 3,5-di-(4-cyanobenzyloxy) benzyl bromide (2) was synthesized by the reaction of 1 with carbon tetrabromide in the presence of triphenylphosphine and tetrahydrofuran. Following, 2 reacted with 3,5-di-hydroxybenzyl alcohol to afford 3,5-di- [3,5-di-(4-
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