A viologen-based host–guest metal–organic framework with both visible photochromism and strong photoluminescence was designed and synthesized, namely (H₂bpyb)[Eu(btec)]₂ (bpyb = 1,4-bis(4-pyridyl)benzene, H₄btec = 1,2,4,5-pyromellitic acid), providing an effective pathway for designing multifunctional optical materials with comprehensive performance.

中文翻译：

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一种具有可见光致变色和强光致发光的紫精基主客体Eu-MOF

设计并合成了一种具有可见光致变色和强光致发光的紫精基主客体金属有机骨架，即(H ₂ bpyb)[Eu(btec)] ₂ (bpyb = 1,4-双(4-吡啶基)苯，H ₄ btec = 1,2,4,5-均苯四酸），为设计具有综合性能的多功能光学材料提供了有效途径。