Driving Unidirectional Molecular Rotary Motors with Visible Light by Intra- And Intermolecular Energy Transfer from Palladium Porphyrin
作者:Arjen Cnossen、Lili Hou、Michael M. Pollard、Philana V. Wesenhagen、Wesley R. Browne、Ben L. Feringa
DOI:10.1021/ja306986g
日期:2012.10.24
light was achieved using palladium tetraphenylporphyrin as a triplet sensitizer. Visible light driven rotation was confirmed by UV/vis absorption, circulardichroism and (1)H NMR spectroscopy and the rotation was confirmed to be unidirectional and with similar photostationary states, despite proceeding via a triplet instead of a singlet excited state of the molecular motor. Energy transfer proceeds in
使用四苯基卟啉钯作为三线态敏化剂实现了使用可见光(530-550 nm)代替紫外线驱动分子旋转电机。可见光驱动的旋转通过紫外/可见光吸收、圆二色性和 (1) H NMR 光谱证实,并且旋转被证实是单向的并且具有相似的光静止状态,尽管通过分子马达的三重态而不是单重态激发态进行. 能量转移以分子间和分子内方式从卟啉的三重态转移到马达。Stern Volmer 图显示,由分子马达引起的卟啉激发态的分子间猝灭速率是受扩散控制的。