镧系元素
等结构
化学
光致发光
金属有机骨架
发光
荧光
晶体结构
超分子化学
水溶液
单晶
配体(生物化学)
结晶学
无机化学
物理化学
离子
有机化学
材料科学
生物化学
物理
受体
光电子学
吸附
量子力学
作者
Yu Shi,Xiang-Long Qu,Qiliang Lu,Jie Zhao,Qiancheng Ma,Wei Sun,Guang-Xiong OuYang,W.T. Fu,Xinyong Tao,Dongsheng Huang
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2023-04-25
卷期号:62 (18): 6934-6947
被引量:6
标识
DOI:10.1021/acs.inorgchem.3c00109
摘要
Several isostructural lanthanide metal-organic frameworks, viz. [Ln(DCHB)1.5phen]n (Ln-MOFs, where Ln = Eu for 1, Tb for 2, Sm for 3 and Dy for 4), are successfully synthesized through the hydrothermal reactions of 4'-di(4-carboxylphenoxy)hydroxyl-2, 2'-bipyridyl (H2DCHB) and lanthanide nitrates as well as chelator 1,10-phenantroline (phen). These structures are characterized by single-crystal X-ray diffraction, and the representative Ln-MOF 1 is a fivefold interpenetrated framework with the uncoordinated Lewis base N sites form DCHB2- ligands. The photoluminescence research studies reveal that Ln-MOFs 1-4 exhibit characteristic fluorescent emissions from ligand-induced lanthanide Ln(III) ions, while the single-component emission spectra of Ln-MOF 4 are all located in a white region under different excitations. The absence of coordinated water and the interpenetration property of the structures are conducive to the structure rigidity, and the results display that Ln-MOF 1 has high thermal/chemical stabilities in common solvents and a wide pH range as well as the boiling water. Notably, luminescent sensing studies reveal that Ln-MOF 1 with prominent fluorescence properties can perform in highly sensitive and selective sensing of vanillylmandelic acid (VMA) in aqueous systems (KSV = 562.8 L·mol-1; LOD = 4.6 × 10-4 M), which can potentially establish a detection platform for the diagnosis of pheochromocytoma via multiquenching mechanisms. Moreover, the 1@MMMs sensing membranes comprised of Ln-MOF 1 and a poly(vinylidene fluoride) (PVDF) polymer can also be facilely developed for VMA detection in aqueous media, suggesting the enhanced convenience and efficiency of practical sensing applications.
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