In this work a selection of octasubstituted phthalocyaninato zinc complexes were synthesized and their photochemistry studied. The substituents included cholesterol (3a), estrone (3b), naphthol (3c) and phenoxy groups substituted with CH3 (3d), C ( CH 3)3 (at two positions, 3e), C ( CH 3)3 (3f), NO2 (3g), NH 2 (3h), COH (3i), COOH (3j), and H (3k). In general, complexes containing electron-donating groups attached to the phenoxy ring (e.g. 3e and 3f) were found to be photochemically unstable with photobleaching quantum yields of the order of 10-3. In the presence of electron-withdrawing groups (3g, 3i, and 3j) the photobleaching quantum yields were of the order of 10-6 to 10-5. Singlet oxygen quantum yields (ΦΔ) ranged from 0.01 to 0.73. The lowest ΦΔ was observed for the highly aggregated complex 3c. All the complexes showed aggregation at high concentrations. Electrochemical reduction using a thin-layer spectroelectrochemistry cell showed that the complexes become more monomeric following reduction.

中文翻译：

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八取代酞菁锌配合物的合成及光化学性质

在这项工作中，合成了一种选择的八取代酞菁锌配合物并研究了它们的光化学。取代基包括胆固醇 (3a)、雌酮 (3b)、萘酚 (3c) 和被 CH 取代的苯氧基3(3d), C (CH3)3（在两个位置，3e），C（CH3)3(3f)，否2(3g)，NH2(3h)、COH (3i)、COOH (3j) 和 H (3k)。通常，发现含有连接到苯氧基环（例如 3e 和 3f）的给电子基团的配合物在光化学上不稳定，光漂白量子产率约为 10-3. 在存在吸电子基团（3g、3i 和 3j）的情况下，光漂白量子产率约为 10-6到 10-5. 单线态氧量子产率 (ΦΔ) 范围从 0.01 到 0.73。最低ΦΔ观察到高度聚集的复合物 3c。所有配合物在高浓度下均显示聚集。使用薄层光谱电化学电池进行电化学还原表明，还原后配合物变得更加单体。