Reversible Heterochiral Aggregation/Dissociation of Bis(2-hydroxyphenyl)diamides Driven by UV/Vis Irradiation
Reversible Heterochiral Aggregation/Dissociation of Bis(2-hydroxyphenyl)diamides Driven by UV/Vis Irradiation
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DOI：
10.1002/anie.201106832
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发表时间：
2012-01-01
影响因子：
16.6
通讯作者：
Shibasaki, Masakatsu
中科院分区：
文献类型：
--
作者：
Nojiri, Akihiro;Kumagai, Naoya;Shibasaki, Masakatsu
光溶解：（R）-和（S）-带有氢键骨架（图中红色）和反式偶氮苯单元（蓝色）的二酰胺形成不溶性异手性聚集体，可通过紫外线照射（365 nm）将偶氮苯单元光异构化为顺式构象而溶解。通过随后用可见光（> 422-nm）照射再次形成不溶性聚集体。沉淀和溶解是明显可逆的。
Light to dissolve:(R)-and (S)-diamides bearing a hydrogen-bonding framework (red in picture) and a trans-azobenzene unit (blue) form an insoluble heterochiral aggregate, which can be dissolved by photoisomerization of the azobenzene unit to the cis conformation by UV irradiation (365-nm). The insoluble aggregate was formed again by subsequent irradiation with visible light (> 422-nm). The precipitation and dissolution is manifestly reversible.