Dual Upconverted and Downconverted Circularly Polarized Luminescence in Donor–Acceptor Assemblies |
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| Authors: | Dr Dong Yang Prof Pengfei Duan Prof Minghua Liu |
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| Affiliation: | 1. CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, Division of Nanophotonics, National Center for Nanoscience and Technology (NCNST), Beijing, P. R. China;2. Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China;3. University of Chinese Academy of Sciences, Beijing, P. R. China |
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| Abstract: | 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. |
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| Keywords: | circularly polarized luminescence self-assembly supramolecular chirality upconversion |
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