发光
材料科学
多金属氧酸盐
纳米晶
光子学
荧光
纳米技术
光电子学
光学
有机化学
化学
物理
催化作用
作者
Jing Zhang,Chengyan Niu,Xuekang Yang,Jiaqi Liu,Qiong Wu,Jingjing Tan,Xuehong Wei,Zhiyong Tang
标识
DOI:10.1002/adom.202300618
摘要
Abstract Achieving smart circularly polarized luminescence (CPL) materials with large luminescence dissymmetry factor ( g lum ) is in high demand for potential technological applications in the chiroptical fields. Herein, a series of chiral photonic crystals (CPCs) derived from cellulose nanocrystals (CNCs) and photosensitive inorganic polyoxometalates (POMs) through an evaporation‐induced self‐assembly strategy are reported. The photonic bandgaps (PBGs) of CPC films are well regulated by controlling the amount of doped POMs, yielding the tunable right‐handed CPL emission with tailored g lum . By locating the maximum emission peak of POMs at the center of the PBG of CPC films, the composite shows remarkable CPL performance with a | g lum | value up to 0.53. Furthermore, the CPL can be reversibly switched on/off through a fluorescence resonance energy transfer (FRET) process controlled by alternate UV irradiation reduction and air oxidation. The CPC films hold the great promise as next‐generation chiroptical memory devices.
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