期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 10, 页码 3429-3439出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc05707j
关键词
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资金
- National Natural Science Foundation of China (NSFC) [21671114, U1904199]
- National Basic Research Program (973 Program) [2014CB660804]
- Young Backbone Teachers Fund of Henan [2018GGJS119]
- Scientific research and service platform fund of Henan Province [2016151]
- fund of scientific and technological innovation team of water ecological security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province
- Nanyang Normal University
In this study, a series of lanthanide metal-organic frameworks were constructed with multifunctional capabilities, including excellent gas adsorption and separation, tunable light emission, and efficient luminescence sensing. The materials showed potential for addressing industrially important separation challenges and were suitable for barcode applications, highlighting their versatility and potential for various applications.
Combining the porous structure and fluorescence properties of metal-organic frameworks (MOFs) with rational design to realize multifunction application is of great significance from an energy and environmental standpoint. Herein, a new series of lanthanide metal-organic frameworks (Ln-MOFs), {[Ln(L)(H2O)]center dot 4H(2)O }(n) (1-Ln, where Ln = Eu, Tb, Gd, and EuxTb1-x), were constructed by using a rigid 5-(2 ',5 '-dicarboxylphenyl) picolinic acid ligand and Ln(3+) ions. 1-Ln was isostructural and exhibited a similar porous framework. Thermogravimetry analysis (TGA), powder X-ray diffraction (PXRD) and N-2 adsorption measurements revealed that 1-Eu exhibits excellent thermal, water and chemical stabilities. As expected, 1-Eu-a (activated 1-Eu) shows a high adsorption capacity for C2H2 (109.2 cm(3) g(-1)) as well as excellent selective separation with ideal adsorbed solution theory (IAST) selectivity for C2H2/CO2 (4.1-3.3), C2H2/CH4 (23-17) and CO2/CH4 (5.6-5.4) at room temperature. More importantly, density functional theory (DFT) calculations and breakthrough experiments were carried out, which highlight its great potential to address challenging industrially important separation. Moreover, a series of bimetallic MOFs 1-EuxTb1-x were constructed by changing the ratio of Eu3+ and Tb3+ and showed excellent linear color tunability (from green to red), indicating that they are suitable for barcode applications. Furthermore, luminescence studies revealed that 1-Eu is an excellent fluorescent probe for sensing Fe3+ (LOD: 0.57 mu M) and CrO42-/Cr2O72- (LOD: 0.79/0.42 mu M) ions in water, with a fast response, high sensitivity, selectivity and recyclability. To the best of our knowledge, 1-Eu is the first reported Ln-MOF material with all-in-one multifunction, including excellent gas adsorption and separation, tunable light emission and efficient luminescence sensing.
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