Abstract
A perylene-based [4]rotaxane was synthesized by the Sonogashira coupling of the 2:2 inclusion complex consisting of two alkynylperylenes and two γ-cyclodextrins with terphenyl-type stopper molecules. The [4]rotaxane showed orange emission attributable to the spatially restricted alkynylperylene excimer with a high fluorescence quantum yield of Φf=0.15. The excimer emission was circularly polarized as a result of the asymmetrically twisted perylene pair under the influence of chirality of γ-cyclodextrin. The glum value of the excimer emission was determined to be −2.1×10−2 at 573 nm, as large as those of the corresponding known pyrene-based series. This is the first example, in which circularly polarized luminescence was clearly observed from the excimer of a pair of perylene cores.
Original language | English |
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Pages (from-to) | 14613-14616 |
Number of pages | 4 |
Journal | Chemistry - A European Journal |
Volume | 24 |
Issue number | 55 |
DOIs | |
State | Published - 2018/10/01 |
Keywords
- chirality
- circularly polarized luminescence
- cyclodextrins
- photochemistry
- rotaxanes
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Organic Chemistry