Five Lanthanide-Based Metal–Organic Frameworks Built from a π-Conjugated Ligand with Isophthalate Units Featuring Sensitive Fluorescent Sensing for DMF and Acetone Molecules,Crystal Growth & Design

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Five Lanthanide-Based Metal–Organic Frameworks Built from a π-Conjugated Ligand with Isophthalate Units Featuring Sensitive Fluorescent Sensing for DMF and Acetone Molecules
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2021-04-13 , DOI: 10.1021/acs.cgd.1c00116
Yan Yang ₁ , Lianzhi Li ₁ , Hua Yang _{1,

2} , Lei Sun _{1,

2}

Affiliation

Five novel lanthanide metal–organic frameworks constructed from a π-conjugated ligand with tetracarboxylate group, 5,5′-(naphthalene-1,5-diyl)diisophthalic acid, have been synthesized solvothermally. Depend on the single-crystal X-ray diffraction data, the series of compounds exhibit 3D microporous framework architectures with two kinds of 1D open channels, giving the free volume about 36.5% calculated through PLATON. Room-temperature luminescent behaviors in the solid state reveal that compounds 2 (Eu-MOF) and 4 (Tb-MOF) exhibit the characteristic emissions of Eu(III) and Tb(III) benefiting from the excellent antenna effect of the ligand. It is noteworthy that the Eu-MOF, compound 2, has been proven to be treated as a fluorescent switch for DMF with more than 2-fold enhancement and acetone, which triggers a superior luminescence quenching giving an almost 100% quenching efficiency, based on sensitively turned on and turned off effects, respectively.

中文翻译：

由π共轭配体与间苯二甲酸酯单元构成的基于镧系元素的五个金属有机骨架，对DMF和丙酮分子具有灵敏的荧光传感

溶剂热合成了由具有四羧酸根基团的π-共轭配体构成的五个新颖的镧系金属-有机骨架，即5,5'-（萘-1,5-二基）二间苯二甲酸。根据单晶X射线衍射数据，这一系列化合物显示具有2D一维开放通道的3D微孔骨架结构，通过PLATON计算得出的自由体积约为36.5％。固态下的室温发光行为表明，化合物2（Eu-MOF）和4（Tb-MOF）表现出Eu（III）和Tb（III）的特征发射，这得益于配体的出色天线效应。值得注意的是Eu-MOF，化合物2分别被证明是DMF的荧光开关，具有超过2倍的增强作用和丙酮，可分别基于灵敏的开启和关闭效果，触发优异的发光猝灭，提供几乎100％的猝灭效率。

更新日期：2021-05-05

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