Center of Micro- and Nanochemistry and Engineering, Organische Chemie I, Universität Siegen , Adolf-Reichwein-Str. 2, D-57068 Siegen, Germany.
J Am Chem Soc. 2013 Dec 18;135(50):18794-7. doi: 10.1021/ja411011a. Epub 2013 Dec 9.
A family of supramolecular four-component nanorotors was quantitatively self-assembled from two different zinc(II) porphyrins: one representing the stator and the other the rotator with DABCO as an interconnecting axle and copper(I) ions. Rotational spinning in ROT-1' occurs at 97,000 s(-1) at 25 °C but is virtually stopped at -75 °C. The activation vs binding data suggest that spinning is an intrasupramolecular process occurring to >99.9% without dissociation. Addition and removal of two further equiv of Cu(+) reversibly switches the mode of the stochastic rotation between pure 180° and mixed 90°/180° steps and reversibly regulates the speed between 97,000 and ~80,000 s(-1).
一个超分子四组分纳米转子家族由两个不同的锌(II)卟啉定量自组装而成：一个代表定子，另一个代表带有 DABCO 作为连接轴的转子，以及铜(I)离子。在 25°C 时，ROT-1' 中的旋转旋转速度为 97,000 s(-1)，但在-75°C 时几乎停止。激活与结合数据表明，旋转是一个超分子内的过程，在没有解离的情况下发生>99.9%。加入和去除另外两个当量的 Cu(+)可以可逆地在纯 180°和混合 90°/180°步之间切换随机旋转的模式，并可逆地调节速度在 97,000 和~80,000 s(-1)之间。
