Photoactive pseudorotaxanes and rotaxanes as artificial molecular machines

被引：20

作者：

Clemente-León, M ^{[1
]}

Marchioni, F ^{[1
]}

Silvi, S ^{[1
]}

Credi, A ^{[1
]}

机构：

[1] Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy

来源：

SYNTHETIC METALS | 2003年 / 139卷 / 03期

关键词：

azobenzene; electrochemistry; electron-transfer; luminescence; Ru complexes; supramolecular chemistry;

D O I：

10.1016/S0379-6779(03)00328-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A molecular machine is an assembly of a discrete number of molecular components (that is, a supramolecular structure) designed to perform mechanical-like movements as a consequence of appropriate external stimuli. The most convenient way to supply energy to an artificial molecular-level machine is through a photochemical reaction, that is, by using light. The two main types of photochemical reactions that can be employed to drive molecular machines are photoisomerization and photoinduced electron-transfer processes. By means of spectroscopic techniques, light can also be used to monitor the operation of the system. Two prototypes of photochemically driven molecular machines are described, namely, (i) a pseudorotaxane undergoing threading/dethreading motions, and (ii) a molecular shuttle based on a rotaxane. The extension of the concept of machine to the molecular-level is important not only for basic research, but also for the growth of nanoscience and the development of nanotechnology. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：773 / 777

页数：5

共 20 条

[1] Rotaxanes incorporating two different coordinating units in their thread:: Synthesis and electrochemically and photochemically induced molecular motions [J].