Herein we report two new TPE‐based 3D MOFs, that is, Sr‐ETTB and Co‐ETTB (TPE=Tetraphenylethylene, H₈ETTB=4′,4′′′,4′′′′′,4′′′′′′′‐(ethene‐1,1,2,2‐tetrayl)tetrakis(([1,1′‐biphenyl]‐3,5‐dicarboxylic acid))). Through tailoring outer shell electron configurations of Sr^II and Co^II cations, the fluorescence intensity of the MOFs is tuned from high emission to complete non‐emission. Sr‐ETTB with strong blue fluorescence shows reversible fluorescence variations in response to pressure and temperature, which is directly related to the reversible deformation of the crystal structure. In addition, non‐emissive Co‐ETTB counterpart exhibits a turn‐on fluorescent enhancement under the stimulation of analyte histidine. In the process, TPE‐cored linkers in the MOFs are released through competitive coordination substitution and subsequently reassembled to perform aggregation‐induced luminescence behavior originated from the organic linkers.

中文翻译：

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基于四苯乙烯的锶和钴金属有机骨架的刺激响应发光特性。

本文中我们报告了两个新的基于TPE的3D MOF，即Sr‐ETTB和Co‐ETTB（TPE =四苯基乙烯，H ₈ ETTB = 4′，4′′′，4′′′′′′，4′′′′ ``''-（乙烯-1,1,2,2-四基）四（（[[1,1'-联苯] -3,5-二羧酸）））。通过定制Sr ^II和Co ^II的外壳电子构^型阳离子，MOF的荧光强度从高发射调整为完全不发射。具有强烈蓝色荧光的Sr-ETTB在压力和温度的响应下显示出可逆的荧光变化，这与晶体结构的可逆形变直接相关。此外，非发射性Co-ETTB对应物在组氨酸分析物的刺激下显示出开启的荧光增强。在此过程中，MOF中以TPE为核心的接头通过竞争性配位取代被释放，然后重新组装以执行源自有机接头的聚集诱导的发光行为。