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Efficient Intramolecular Energy Transfer between Two Fluorophores in a Bis‐Branched [3]Rotaxane
Author(s) -
Yao Jian,
Li Hong,
Xu YaNan,
Wang QiaoChun,
Qu DaHui
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201402789
Subject(s) - rotaxane , bodipy , fluorophore , intramolecular force , photochemistry , moiety , fluorescence , chemistry , fluorescence spectroscopy , förster resonance energy transfer , acceptor , absorption spectroscopy , spectroscopy , absorption (acoustics) , molecule , materials science , stereochemistry , supramolecular chemistry , organic chemistry , physics , quantum mechanics , composite material , condensed matter physics
A bis‐branched [3]rotaxane, with two [2]rotaxane arms separated by an oligo( para ‐phenylenevinylene) (OPV) fluorophore, was designed and investigated. Each [2]rotaxane arm employed a difluoroboradiaza‐ s ‐indacene (BODIPY) dye‐functionalized dibenzo[24]crown‐8 macrocycle interlocked onto a dibenzylammonium in the rod part. The chemical structure of the [3]rotaxane was confirmed and characterized by 1 H and 13 C NMR spectroscopy and high‐resolution ESI mass spectrometry. The photophysical properties of [3]rotaxane and its reference systems were investigated through UV/Vis absorption, fluorescence, and time‐resolved fluorescence spectroscopy. An efficient energy‐transfer process in [3]rotaxane occurred from the OPV donor to the BODIPY acceptor because of the large overlap between the absorption spectrum of the BODIPY moiety and the emission spectrum of the OPV fluorophore; this shows the important potential of this system for designing functional molecular systems.