Synthesis and Characterization of a Novel Frétchet Dendritic Phthalocyanine Zinc(Ⅱ): Tetra-{3,5-di-[3,5-di-(4-carboxylic benzyloxy) benzyloxy] benzyloxy} Phthalocyanine Zinc(Ⅱ)

Abstract

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-

Synthesis, Photophysical Properties and Photoinduced Intermolecular Electron Transfer of a Novel Aryl Benzyl Ester Dendritic Axially Substituted Silicon (IV) Phthalocyanine

“…Fluorescence quantum yields and lifetimes: Fluorescence quantum yields were determined according to Eq.1 [7].…”

Photo-induced intra-molecular energy transfer of tetra-{3,5-di-(4-nitro benzyloxy) benzyloxy} zinc (II) phthalocyanine

“…Other solvents involved in this experiment, including dimethylsulfoxide (DMSO), dimethyl formamide (DMF), and chloroform were purchased from Sino-pharm Chemical Reagent Co. Ltd. Methods UV/Vis absorption spectra were measured using a UV/Vis spectrophotometer (Cary50, Varian, USA), steady-state and time-resolved fluorescence spectra were measured on a FL900/FS920 fluorescence spectrophotometer. Fluorescence quantum yields were determined according to Eq.1 [9], (1) Where Φ ZnPc is the fluorescence quantum yield of ZnPc in DMF ( Φ ZnPc =0.20), Fx is the fluorescence of integral of substituent zinc phthalocyanine, F ZnPc is the fluorescence of integral of ZnPc, A ZnPc is the absorbance of ZnPc , and Ax is the absorbance of substituent ZnPc. The intra-molecular energy transfer quantum yield (Φ ENT ) can be determined through steady-state fluorescence spectroscopy approach.…”