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

Chen, Shoushun, Lucier, Bryan E. G., Luo, Wilson, Xie, Xinkai, Feng, Kun, Chan, Hendrick, Terskikh, Victor V., Sun, Xuhui, Sham, Tsun-Kong, Workentin, Mark S., Huang, Yining
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.