Solid materials with dynamically tunable circularly polarized luminescence (CPL) feature higher security levels and device-friendly characteristics, showing great superiority in the field of information technology and anti-counterfeiting. To address the limited photoisomerization of fluorescent photoswitch in CPL-active solid materials, here a cholesteric liquid crystal elastomer (CLCE) containing a hydrogen-bonded (H-bonded) polymerizable fluorescent switch AHBA-PSD is prepared. Owing to the good flexibility and low glass-transition temperature of CLCE, AHBA-PSD shows a fast and fully reversible photocyclization/cycloreversion with fluorochromic behavior in CLCE. Further, by controlling the spectral overlapping area between the emission and reflection bands, the CLCE exhibits a strong CPL with a g_lum value of up to 0.76 accompanied by a reversible phototunable CPL signal. Meanwhile, the H-bond helps to stabilize the mechanical property, and the force-induced switching-off of CPL signal could be achieved due to the destroyed helical structures by external force. Finally, an automatically-recognized identification card with abundant chiroptical information is demonstrated.

动态可调圆偏振发光（CPL）固体材料具有更高的安全等级和设备友好的特性，在信息技术和防伪领域显示出巨大的优越性。为了解决CPL活性固体材料中荧光光开关的有限光异构化问题，本文制备了含有氢键（H键）可聚合荧光开关AHBA-PSD的胆甾型液晶弹性体（CLCE）。由于 CLCE 良好的柔韧性和较低的玻璃化转变温度，AHBA-PSD 在 CLCE 中表现出快速且完全可逆的光环化/环化回复和荧光变色行为。此外，通过控制发射带和反射带之间的光谱重叠面积，CLCE表现出很强的CPL，g _lum 值高达0.76，并伴有可逆的光可调CPL信号。同时，氢键有助于稳定机械性能，并且由于外力破坏螺旋结构，可以实现CPL信号的力诱导关闭。最后，展示了一种具有丰富手性信息的自动识别身份证。