Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 26, Pages 14595-14600Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202103091
Keywords
circularly polarized luminescence; hydrogen bonding; light-harvesting energy transfer; organic crystals; white luminescence
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Funding
- National Natural Science Foundation of China [21925112, 22090021, 21975264, 21872154]
- Science and Technology Commission of Shanghai Municipality [16DZ1100300]
- Beijing Natural Science Foundation [2191003]
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This paper proposes a simple method for in situ preparation of circularly polarized luminescence (CPL)-active microcrystals, which achieves control of luminescence dissymmetry through hydrogen bonding interactions between molecules, allowing for tunable emission colors, ordered morphology, and high luminescence efficiency.
A simple and general method is presented herein for the in situ preparations of circularly polarized luminescence (CPL)-active microcrystals with a large luminescence dissymmetry factor g(lum), high fluorescence quantum efficiency (phi(FL)), wide emission color tenability, and well-ordered morphology. The reactions of pyridine-containing achiral molecules 1-7 with chiral camphor sulfonic acid ((+/-)-CSA) gave crystalline microplates formed by hydrogen bonding interactions between the protonated pyridinium units and the sulfonic anions. The chiral information of CSA are effectively transferred to the microcrystals by hydrogen bonding to afford full-color CPL from deep-blue to red with g(lum) in the order of 10(-2) and phi(FL) up to 80 %. Moreover, organic microcrystals with high-performance white CPL (phi(FL)=46 %; |g(lum)|=0.025) are achieved via the light-harvesting energy transfer between blue and yellow emitters.
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