Dual and sequential locked/unlocked photo-switching effects on FRET processes by tightened/loosened nano-loops of diarylethene-based [1]rotaxanes.
Trang Manh KhangPham Quoc NhienTu Thi Kim CucChia-Hua WuBui Thi Buu HueJudy I-Chia WuYaw-Kuen LiHong-Cheu LinPublished in: Chemical communications (Cambridge, England) (2023)
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.