Department of Chemistry G. Ciamician, University of Bologna, via Selmi 2, 40126 Bologna, Italy.
J Am Chem Soc. 2012 Sep 19;134(37):15277-80. doi: 10.1021/ja307522f. Epub 2012 Sep 7.
A dendrimer bearing two cyclam units linked by an azobenzene moiety, and luminescent naphthalene units at the periphery performs three different functions (light-harvesting, photoisomerization and coordination of metal ions) which can cooperate or interfere depending on the nature of the metal ion. It is thus an example of light controlled molecular tweezers in which Zn(II) coordination allows 100% efficient photosensitization of azobenzene switching, while Cu(II) shuts down azobenzene isomerization.
一种树枝状聚合物，其两端由偶氮苯部分连接两个环戊二烯单元，外围则连接发光萘单元，可执行三种不同的功能（光收集、光异构化和金属离子配位），具体取决于金属离子的性质。因此，它是一种光控分子镊子的例子，其中 Zn(II) 配位允许 100%高效光敏化偶氮苯开关，而 Cu(II) 则关闭偶氮苯异构化。
