Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 7, Issue 30, Pages 9278-9283Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tc01956a
Keywords
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Funding
- Program for International Science & Technology Cooperation Projects of China [2011DFA50430]
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Novel chiral nematic liquid crystalline composite films with left and right circularly polarized luminescence (CPL) are fabricated via the co-assembly of achiral luminophores and cellulose nanocrystals. The CPL-active system is flexible and the direction of the CPL can be easily switched by changing the helical pitch of the composite films. Furthermore, a considerably high CPL intensity is revealed and the dissymmetry factor (g(lum)) is up to 10(-1). Notably, this approach is versatile and a variety of achiral dyes can be doped to display such a property, providing full-color and tunable CPL. Chiral induction and selective reflection mechanisms are proposed for the generation of mirror-image CPL. The present study provides a simple and general strategy for constructing flexible CPL materials.
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