Abstract
Materials capable of circularly polarized luminescence (CPL) have attracted considerable attention for their promising potential applications. Bacterial cellulose (BC) was characterized as having a stable right-handed twist, which makes it a potential chiral host to endow luminophores with CPL. Then, the CPL-active BC composite film was constructed by simply impregnating bacterial cellulose pellicles with dilute aqueous solutions of luminophores (rhodamine B, carbon dots, polymer dots) and drying under ambient conditions. Simple encapsulation of luminophores renders BC with circularly polarized luminescence with a dissymmetry factor of up to 0.03. The multiple chiral centers of bacterial cellulose provide a primary asymmetric environment that can be further modulated by supramolecular chemistry, which is responsible for its circular polarization ability. We further demonstrate that commercial grade paper may endow luminophores with CPL activity, which reifies the universality of the method.
Highlights
Materials capable of circularly polarized luminescence (CPL) have attracted considerable attention for their promising potential applications in display technologies, biosensing, chiral catalysis, diffraction-free patterning, and telecommunication [1,2,3,4,5,6,7,8,9,10,11]
The bacterial cellulose-luminophore paper (BC-paper) was prepared by impregnation in luminophore solutions followed by drying under ambient conditions (Scheme 1, Figure 1a)
We have experimentally demonstrated that the intrinsic chirality of bacterial cellulose may transform spontaneous photoemission to circularly polarized luminescence with dissymmetry factors of up to 0.03
Summary
Materials capable of circularly polarized luminescence (CPL) have attracted considerable attention for their promising potential applications in display technologies, biosensing, chiral catalysis, diffraction-free patterning, and telecommunication [1,2,3,4,5,6,7,8,9,10,11]. That means there are lots of promising natural chiral host matrices for generating CPL. Most contemporary CPL-active materials display luminescence dissymmetry factors in the range of 10−3 –10−2 , and they are usually synthesized by tedious procedures using costly materials and often causing a negative impact on the environment which could be alleviated, to some extent, by using natural products
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