Indium–Organic Frameworks Based on Dual Secondary Building Units Featuring Halogen-Decorated Channels for Highly Effective CO2 Fixation

By Yang Yuan, Jiantang Li, Xiaodong Sun, Guanghua Li, Yunlin Liu, G. Verma, Shengqian Ma. Chemistry of Materials, 2019

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With the utilization of a “bifunctional ligand-directed strategy”, three isostructural indium–organic frameworks based on dual secondary building units (SBUs) were successfully constructed with targeted structures. In their frameworks, two types of unsaturated monomeric indium SBUs—[In(OOC-)2(-N-)X(H2O)] and [In(OOC-)2(-N-)X2]− (X = Cl, Br, and I)—assemble to form 1D tubular channels with both open metal sites and weak base polarizing substituents. The trimeric indium SBUs [In3O(OOC-)6(DMA)3]+ serve as robust external linkers to extend into a 3D honeycomb double-walled framework with nanoscale channels. By changing the polarizing substituents in situ with different halogens (Cl–, Br–, and I–), three obtained isostructural MOFs show different channel characteristics, such as alkalinity of the polarizing substituents, acidity of the polarized open indium sites, extended channel sizes, and increased pore volumes (from -I to -Cl). Subsequently, we took the three MOFs collectively as a platform to investigate ...

Subfields: Inorganic Chemistry, Materials Chemistry, Process Chemistry and Technology

View Paper: https://www.semanticscholar.org/paper/0b0a7189831296620d9828248f2e9a179217df8b