Flexible and breathing metal-organic framework with high and selective carbon dioxide storage versus nitrogen

A new functionalized metal-organic framework (MOF) {[Zn-2(fum)(2)(4-bpdb)]center dot 2H(2)O)}(n) (TMU-42) fumarate (fum) and 1,4-bis(4-pyridyl)-3,4-diaza-1,3-butadiene (4-bpdb), synthesized and characterized by single crystal X-ray diffraction, X-ray diffraction (XRD), etc. The breathing phenomenon and azine functional group introduced 2-fold interpenetrated TMU-42 as one of the highest CO2 storage capacity and surface area in between pillared metal-organic frameworks. To reveal functionality effect on CO2 adsorption TMU-42 compared with previously reported non-functionalized MOF, {[Zn-2(fum)(2)(dpe)]center dot DMF center dot(H2O)(0.5)}(n) (TMU-43) 2-di(4-pyridyl)ethylene (dpe). (C) 2019 Elsevier Ltd. All rights reserved.