title: Photodriven clamlike motion in a [3]rotaxane with two [2]rotaxane arms bridged by an overcrowded alkene switch.
abstract: A [3]rotaxane with two [2]rotaxane arms bridged by an overcrowded alkene switch has been constructed to perform the clamlike motion in response to light stimulus. We demonstrated that this [3]rotaxane can undergo reversible conformational changes caused by the trans-cis isomerizations of the central double bond with a favorable photostationary state (up to 90% conversion). It has been shown that the clamlike motion causes remarkable UV-vis and fluorescence spectral changes, allowing it to behave as a reversible optical molecular switch.
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.forename: Ya-Jing
authors.initials: YJ
authors.lastname: Guo
authors.forename: Da-Hui
authors.initials: DH
authors.lastname: Qu