Kai Hiroyuki, Nara Shinji, Kinbara Kazushi, Aida Takuzo
Department of Chemistry and Biotechnology, School of Engineering and Center for NanoBio Integration, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Am Chem Soc. 2008 May 28;130(21):6725-7. doi: 10.1021/ja801646b. Epub 2008 May 1.
A heterotropic ternary complex was obtained from a photochromic dithienylethene derivative bearing pyridyl groups (1), a chiral tetrasubstituted ferrocene as a scissoring component bearing two pyridyl and free-base porphyrin groups (3*), and a biaryl derivative as an intermediately bridging component bearing four zinc porphyrin handles (2). The three components are connected together via bidentate coordination bonds and mechanically interconnected. Exposure of the ternary complex to UV or visible light allowed for the isomerization of 1. This configurational change gave rise to an angular motion of 2, resulting in a scissoring motion of 3*. In the absence of 2, the isomerization of 1 does not lead to any defined motions of 3*. Thus, the heterotropic ternary complex may be regarded as a prototype of "molecular reacher" for remote manipulation of molecular events.
带有吡啶基的光致变色二噻吩乙烯衍生物（1）、作为具有两个吡啶基和游离碱卟啉基团的剪切组件的手性四取代二茂铁（3*）以及作为具有四个锌卟啉柄的中间桥连组件的联芳基衍生物（2）。这三种组分通过双齿配位键连接在一起并机械地相互关联。将该三元复合物暴露于紫外光或可见光下会使1发生异构化。这种构型变化导致2发生角向运动，进而产生3的剪切运动。在没有2的情况下，1的异构化不会导致3发生任何确定的运动。因此，该异向三元复合物可被视为用于远程操纵分子事件的“分子伸展器”的原型。
