Dual and sequential locked/unlocked photo-switching effects on FRET processes by tightened/loosened nano-loops of diarylethene-based [1]rotaxanes†
Pham Quoc
Nhien, 
ab
Tu Thi Kim
Cuc,
a
Chia-Hua
Wu,
a
Judy I.
Wu,
c
Yaw-Kuen
Li
de
and
Hong-Cheu
Lin
*ae
ab
Tu Thi Kim
Cuc,
a
Chia-Hua
Wu,
a
Judy I.
Wu,
c
Yaw-Kuen
Li
de
and
Hong-Cheu
Lin
*ae
Abstract
The self-trapping nano-loop structures of [1]rotaxanes exhibited multiple Förster resonance energy transfer (FRET) patterns via dual and sequential locking/unlocking of pH-gated and UV exposure processes. As a tightened and constrained nano-loop in the acidic condition, dithienylethene (DTE) unit was locked in the highly bending open form to forbid ring closure upon UV irradiation.
![Graphical abstract: Dual and sequential locked/unlocked photo-switching effects on FRET processes by tightened/loosened nano-loops of diarylethene-based [1]rotaxanes](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D2CC06285B&imageInfo.ImageIdentifier.Year=2023)
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