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Rational Design of Multi-color-emitting Chiral Carbonized Polymer Dots for Full-color and White Circularly Polarized Luminescence.

Angewandte Chemie 2021 April 9
Light-emitting chiral carbonized polymer dots (Ch-CPDs) are attracting great interest due to their extraordinary photonic properties, but modulating their bandgap emission, especially at long wavelength, and maintaining their chiral structure to achieve multi-color, high-emission Ch-CPDs remains challenging. Here we report for the first time the synthesis of red- and multi-color emitting Ch-CPDs using the common precursors L-/D-tryptophan and o-phenylenediamine and a solvothermal approach at one temperature. The quantum yield of the Ch-CPDs was between 31% and 54%. Supramolecular self-assembly provided multi-color-emitting Ch-CPDs showing novel circularly polarized luminescence, with the highest dissymmetric factor (g lum ) of 1 × 10 -2 . Importantly, circularly polarized white-emitting CPDs were fabricated for the first time by tuning the mixing ratio of the three colored Ch-CPDs in a gel. Our strategy affords exciting opportunities for designing functional chiroptical materials.

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