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Distinct and Selective Amine- and Anion-Responsive Behaviors of an Electron-Deficient and Anion-Exchangeable Metal-Organic Framework.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-09-03 , DOI: 10.1021/acsami.0c14648
Meng-Yue Guo 1, 2 , Peng Li 1, 3 , Shuai-Liang Yang 1 , Ran Bu 1 , Xian-Qing Piao 2 , En-Qing Gao 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-09-03 , DOI: 10.1021/acsami.0c14648
Meng-Yue Guo 1, 2 , Peng Li 1, 3 , Shuai-Liang Yang 1 , Ran Bu 1 , Xian-Qing Piao 2 , En-Qing Gao 1
Affiliation
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Smart materials that respond to chemical stimuli with color or luminescence changes are highly desirable for daily-life and high-tech applications. Here, we report a novel porous metal–organic framework (MOF) that shows multiple, selective, and discriminative responsive properties owing to the combination of different functional ingredients [tripyridinium chromogen, Eu(III) luminophore, cationic framework, and special porous structure]. The MOF contains two interpenetrated three-dimensional cationic coordination networks built of a tetrahedral [Eu4(μ3-OH)4] cluster and a tripyridinium-tricarboxylate zwitterionic linker. It shows reversible and discriminative chromic response to aliphatic amines and aniline through different host–guest interactions between electron-deficient pyridinium and electron-rich amines. The size- and shape-selective response to aliphatic amines is ascribed to the radical formation through host–guest electron transfer, whereas the response to aniline is ascribed to the formation of sandwich-type acceptor–donor–acceptor complexes. The MOF is capable of reversible anion exchange with various anions and shows selective and discriminative ionochromic response to iodide, bromide, and thiocyanate, which is attributed to charge-transfer complexation. The above chromic behaviors are accompanied by efficient quenching of Eu(III) photoluminescence. The MOF represents a multi-stimuli dual-output responsive system. It can be used for discrimination and identification of anions and amines. The potential use in invisible printing, reusable sensory films, and optical switches was demonstrated by the ink and the membrane made of the MOF and organic polymers.
中文翻译:
电子不足和阴离子可交换的金属有机骨架的独特和选择性的胺和阴离子响应行为。
响应于颜色或发光变化的化学刺激的智能材料非常适合日常生活和高科技应用。在这里,我们报告了一种新颖的多孔金属-有机骨架(MOF),由于不同的功能成分[三吡啶鎓色原,Eu(III)发光体,阳离子骨架和特殊的多孔结构]的结合,显示出多种,选择性和区分性的响应特性。该MOF包含两个互穿内置四面体的[Eu的三维阳离子协调网络4(μ 3 -OH)4]簇和三吡啶鎓三羧酸盐两性离子接头。它通过缺电子的吡啶鎓和富电子的胺之间的不同主客体相互作用,显示出对脂肪族胺和苯胺的可逆和可辨别的铬响应。对脂肪胺的大小和形状选择性响应归因于通过主体-客体电子转移形成自由基,而对苯胺的响应归因于夹心型受体-供体-受体复合物的形成。MOF能够与各种阴离子进行可逆的阴离子交换,并显示出对碘化物,溴化物和硫氰酸盐的选择性和区分性离子电致变色反应,这归因于电荷转移络合。上述铬行为伴随着Eu(III)光致发光的有效猝灭。MOF代表多刺激双输出响应系统。它可用于区分和鉴定阴离子和胺。由MOF和有机聚合物制成的油墨和薄膜证明了在不可见印刷,可重复使用的传感膜和光学开关中的潜在用途。
更新日期:2020-09-30
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
电子不足和阴离子可交换的金属有机骨架的独特和选择性的胺和阴离子响应行为。
响应于颜色或发光变化的化学刺激的智能材料非常适合日常生活和高科技应用。在这里,我们报告了一种新颖的多孔金属-有机骨架(MOF),由于不同的功能成分[三吡啶鎓色原,Eu(III)发光体,阳离子骨架和特殊的多孔结构]的结合,显示出多种,选择性和区分性的响应特性。该MOF包含两个互穿内置四面体的[Eu的三维阳离子协调网络4(μ 3 -OH)4]簇和三吡啶鎓三羧酸盐两性离子接头。它通过缺电子的吡啶鎓和富电子的胺之间的不同主客体相互作用,显示出对脂肪族胺和苯胺的可逆和可辨别的铬响应。对脂肪胺的大小和形状选择性响应归因于通过主体-客体电子转移形成自由基,而对苯胺的响应归因于夹心型受体-供体-受体复合物的形成。MOF能够与各种阴离子进行可逆的阴离子交换,并显示出对碘化物,溴化物和硫氰酸盐的选择性和区分性离子电致变色反应,这归因于电荷转移络合。上述铬行为伴随着Eu(III)光致发光的有效猝灭。MOF代表多刺激双输出响应系统。它可用于区分和鉴定阴离子和胺。由MOF和有机聚合物制成的油墨和薄膜证明了在不可见印刷,可重复使用的传感膜和光学开关中的潜在用途。