A MOF platform for incorporation of complementary organic motifs for CO₂ binding

Abstract

CO2 capture is essential for reducing the carbon footprint of coal-fired power plants. Here we show, both experimentally and computationally, a new design strategy for capturing CO2 in nanoporous adsorbents. The approach involves 'complementary organic motifs' (COMs), which have a precise alignment of charge densities that is complementary to the CO2 quadrupole. Two promising COMs were post-synthetically incorporated into a robust metal-organic framework (MOF) material using solvent-assisted ligand incorporation (SALI). We demonstrate that these COM-functionalized MOFs exhibit high capacity and selectivity for CO2 relative to other reported motifs.

Postsynthetic Modification of Zirconium Metal‐Organic Frameworks

“…An alternative strategy to improve the CO 2 capacity of NU‐1000 was to incorporate “complementary organic motifs” (predesigned organic molecules that are complementary to the CO 2 quadrupole) at the Zr 6 nodes by SALI . The complementary organic motifs were based upon either a 2,6‐diacetylaminopyridine or an FMoc (FMoc = N ‐α‐fluorenylmethyloxycarbonyl) protected triglycine peptide.…”

Postsynthetic Incorporation of a Singlet Oxygen Photosensitizer in a Metal–Organic Framework for Fast and Selective Oxidative Detoxification of Sulfur Mustard

“…[30] For Zr 6 -based MOFs, SALI requires accessible aquaa nd hydroxo groups (ligands on the node) that can be displaced by carboxylate-or phosphonate-functionalized ligands. [31] Herein, we report the use of SALI for integratingi solated, non-structural, chromophores with aZr 6 -MOF for the fast and selective oxidation of CEESand sulfur mustard.…”

Incorporation of Alkylamine into Metal–Organic Frameworks through a Brønsted Acid–Base Reaction for CO2 Capture

“…[3,[5][6][7][8][9][10][11][12][13] Among them, metal-organic frameworks (MOFs) are considered to be promising candidates for their high porosity, tunable structure, and low heat capacity. [14][15][16][17][18][19][20][21][22][23][24][25][26][27] In most cases, CO 2 is physically adsorbed in MOFs. [28][29][30] This leads to av ery low selectivity of CO 2 over coexisting species with higherp olarity in flue gas or air,s uch as H 2 O, [5,31,32] whichs everelyr estricts the CO 2 adsorption capacity of MOFs under moist condi-tions.…”