Biobased and biodegradable films exhibiting circularly polarized room temperature phosphorescence

Author:

Cao Mengnan,Ren Yiran,Wu YueORCID,Shen Jingjie,Li ShujunORCID,Yu Zhen-QiangORCID,Liu Shouxin,Li Jian,Rojas Orlando J.ORCID,Chen ZhijunORCID

Abstract

AbstractThere is interest in developing sustainable materials displaying circularly polarized room-temperature phosphorescence, which have been scarcely reported. Here, we introduce biobased thin films exhibiting circularly polarized luminescence with simultaneous room-temperature phosphorescence. For this purpose, phosphorescence-active lignosulfonate biomolecules are co-assembled with cellulose nanocrystals in a chiral construct. The lignosulfonate is shown to capture the chirality generated by cellulose nanocrystals within the films, emitting circularly polarized phosphorescence with a 0.21 dissymmetry factor and 103 ms phosphorescence lifetime. By contrast with most organic phosphorescence materials, this chiral-phosphorescent system possesses phosphorescence stability, with no significant recession under extreme chemical environments. Meanwhile, the luminescent films resist water and humid environments but are fully biodegradable (16 days) in soil conditions. The introduced bio-based, environmentally-friendly circularly polarized phosphorescence system is expected to open many opportunities, as demonstrated here for information processing and anti-counterfeiting.

Funder

Canada Excellence Research Chairs, Government of Canada

Canada Foundation for Innovation

National Natural Science Foundation of China

Publisher

Springer Science and Business Media LLC

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