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Loading across the Periodic Table: Introducing 14 Different Metal Ions To Enhance Metal–Organic Framework Performance

Shoushun Chen, Bryan E. G. Lucier, Wilson Luo, Xinkai Xie, Kun Feng, Hendrick Chan, Victor V. Terskikh, Xuhui Sun, Tsun-Kong Sham, Mark S. Workentin, Yining Huang
ACS applied materials & interfaces 2018 v.10 no.36 pp. 30296-30305
X-ray diffraction, adsorption, barium, cadmium, calcium, carbon dioxide, catalytic activity, cobalt, coordination polymers, cost effectiveness, hydrogen, indium, lanthanum, lead, lithium, magnesium, manganese, metal ions, moieties, nanosilver, nuclear magnetic resonance spectroscopy, p-nitrophenol, potassium, silver, sodium, zinc
Loading metal guests within metal–organic frameworks (MOFs) via secondary functional groups is a promising route for introducing or enhancing MOF performance in various applications. In this work, 14 metal ions (Li⁺, Na⁺, K⁺, Mg²⁺, Ca²⁺, Ba²⁺, Zn²⁺, Co²⁺, Mn²⁺, Ag⁺, Cd²⁺, La³⁺, In³⁺, and Pb²⁺) have been successfully introduced within the MIL-121 MOF using a cost-efficient route involving free carboxylic groups on the linker. The local and long-range structure of the metal-loaded MOFs is characterized using multinuclear solid-state NMR and X-ray diffraction methods. Li/Mg/Ca-loaded MIL-121 and Ag nanoparticle-loaded MIL-121 exhibit enhanced H₂ and CO₂ adsorption; Ag nanoparticle-loaded MIL-121 also demonstrates remarkable catalytic activity in the reduction of 4-nitrophenol.