Dual Upconverted and Downconverted Circularly Polarized Luminescence in Donor–Acceptor Assemblies

Through mimicking both the chiral and energy transfer in an artificial self‐assembled system, not only was chiral transfer realized but also a dual upconverted and downconverted energy transfer system was created that emit circularly polarized luminescence. The individual chiral π‐gelator can self‐a...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2018-07, Vol.57 (30), p.9357-9361
Main Authors: Yang, Dong, Duan, Pengfei, Liu, Minghua
Format: Article
Language:English
Subjects:
Chirality
Circular polarization
circularly polarized luminescence
Energy transfer
Luminescence
Mimicry
Nanofibers
self-assembly
supramolecular chirality
Upconversion
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Summary:Through mimicking both the chiral and energy transfer in an artificial self‐assembled system, not only was chiral transfer realized but also a dual upconverted and downconverted energy transfer system was created that emit circularly polarized luminescence. The individual chiral π‐gelator can self‐assemble into a nanofiber exhibiting supramolecular chirality and circularly polarized luminescence (CPL). In the presence of an achiral sensitizer PdII octaethylporphyrin derivative, both chirality transfer from chiral gelator to achiral sensitizer and triplet‐triplet energy transfer from excited sensitizer to chiral gelator could be realized. Upconverted CPL could be observed through a triplet–triplet annihilation photon upconversion (TTA‐UC), while downconverted CPL could be obtained from chirality‐transfer‐induced emission of the achiral sensitizer. The interplay between chiral energy acceptor and achiral sensitizer promoted the communication of chiral and excited energy information. Both kinds of CPL: Dual upconverted and downconverted circularly polarized luminescence (CPL) could be realized in a composite self‐assembly system, which integrated with chirality and triplet–triplet energy transfer (TTET) process. Upconverted CPL could be observed through a triplet–triplet annihilation photon upconversion (TTA‐UC) process.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201804402