title: Altering intercomponent interactions in a photochromic multi-state [2]rotaxane.
abstract: Rotaxanes have attracted much attention because of their challenging constructions and potential applications. In this paper, a multi-state [2]rotaxane, in which a dithienylethene-functionalized dibenzo-24-crown-8 macrocycle was interlocked onto a thread component bearing a 4-morpholin-naphthalimide fluorescent stopper and two distinct recognition sites, namely, dibenzylammonium and N-methyltriazolium recognition sites, was prepared and studied. By introducing a dithienylethene photochrome into the macrocycle component, multi-mode alteration of the intercomponent interactions, such as energy transfer, electron transfer, and charge transfer interaction between the photochrome and the fluorescent naphthalimide stopper could be altered in this multi-state rotaxane system in response to the combination of chemical and photochemical stimuli.
authors.affiliation: Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai, 200237, PR China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.forename: Xin-Xin
authors.initials: XX
authors.lastname: Kou
authors.forename: Qiong
authors.initials: Q
authors.lastname: Zhang
authors.forename: Da-Hui
authors.initials: DH
authors.lastname: Qu
authors.forename: He
authors.initials: H
authors.lastname: Tian