Synthesis and photophysical properties of water-soluble dendrimers bearing a phthalocyanine core
Synthesis and photophysical properties of water-soluble dendrimers bearing a phthalocyanine core
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DOI：
10.1142/s1088424607000515
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发表时间：
2007-06
影响因子：
1.5
通讯作者：
M. Nishida;A. Momotake;Y. Shinohara;Y. Nishimura;T. Arai
中科院分区：
文献类型：
--
作者：
M. Nishida;A. Momotake;Y. Shinohara;Y. Nishimura;T. Arai
研究了具有树枝状结构的酞菁衍生物在水溶液中的聚集行为。我们制备了第一代和第二代树枝状聚合物（WG 1-PC和WG 2-PC），具有水溶性取代基作为外围基团，在水中溶解。从光谱测量，WG2-PC以单体方式起作用，即使在水溶液中，与WG1-PC相反，其表现出归因于聚集的光谱。这意味着更高代的水溶性树枝状聚合物可以防止酞菁核形成聚集体。将第二代树枝化基元引入可聚集的核可以有效地避免自聚集和不期望的失活过程。
Aggregation behaviors of phthalocyanine derivatives which have a dendritic structure were examined in an aqueous solution. We prepared the first- and second-generation dendrimers (WG1-PC and WG2-PC), having water-soluble substituents as a peripheral group, to be resolved in water. From spectroscopic measurement, WG2-PC acted in a monomeric manner, even in an aqueous solution, in contrast to WG1-PC, which exhibited spectra attributed to aggregation. This implies that a higher generation of water-soluble dendrimers can prevent a phthalocyanine core from forming an aggregation. The introduction of the second-generation dendrons to an aggregatable core may be effective to avoid self-aggregation and an undesirable deactivation process.