A Stable Zr(IV)-Based Metal–Organic Framework Constructed from C═C Bridged Di-isophthalate Ligand for Sensitive Detection of Cr<sub>2</sub>O<sub>7</sub><sup>2–</sup> in Water
作者:Ming-Ming Xu、Xiang-Jing Kong、Tao He、Xue-Qian Wu、Lin-Hua Xie、Jian-Rong Li
DOI:10.1021/acs.inorgchem.8b02282
日期:2018.11.19
new sensors have been developing for its effective detection from water, among which metal–organic frameworks (MOFs) show distinct superiority over many other materials. Herein, a new fluorescent Zr(IV)-based MOF, [Zr6O4(OH)8(H2O)4(sbtc)2] (referred to as BUT-28), based on the di-isophthalate ligand with a central CH═CH moiety, trans-stilbene-3,3′,5,5′-tetracarboxylate (sbtc4–), has been prepared and
由于Cr 2 O 7 2–阴离子具有剧毒,因此已经开发出新的传感器以从水中进行有效检测,其中金属有机框架(MOF)表现出优于许多其他材料的独特优势。在此,基于二间邻苯二甲酸酯配体,基于Zr(IV)的新型荧光MOF [Zr 6 O 4(OH)8(H 2 O)4(sbtc)2 ](称为BUT-28) CH═CH的中心部分,反式-stilbene-3,3',5,5'-四羧酸盐(sbtc 4–),已经准备好并在结构上确定了。MOF在中性,高酸性和弱碱性水溶液中显示出极好的稳定性。此外,对于BUT-28,在三个水蒸气吸附-解吸测量周期中均未观察到必要的吸收损失,这表明多孔骨架的坚固性及其长期使用的巨大潜力。对BUT-28和同构MOF Zr-abtc进行了荧光测量,该结构由具有中心N═N部分的二间苯二甲酸配体,偶氮苯3,3',5,5'-四羧酸(abtc 4–)。有趣的是,Zr-abtc显示出非常弱的荧