Opening Metal−Organic Frameworks Vol. 2: Inserting Longer Pillars into Pillared-Paddlewheel Structures through Solvent-Assisted Linker Exchange
نویسندگان
چکیده
Solvent-assisted linker exchange (SALE) was performed on a pillared-paddlewheel metal−organic framework (MOF), SALEM-5, to achieve incorporation of longer linkers into the material. The 9-Å meso-1,2-di(4-pyridyl)-1,2ethanediol pillar of SALEM-5 was successfully replaced by 11Å, 14-Å, and 17-Å pillars to generate daughter MOFs SALEM6, SALEM-7, and SALEM-8. The daughter frameworks possess more open cages, as was demonstrated by structural modeling from the powder X-ray diffraction patterns, and larger solvent accessible space, as was demonstrated by thermogravimetric analysis. Finally, a study was performed to examine the effect of pKa of monoprotonated dipyridyl pillars (as an indicator of the Zn−L bond strength) on the outcome of SALE.
منابع مشابه
Control over Catenation in Pillared Paddlewheel Metal−Organic Framework Materials via Solvent-Assisted Linker Exchange
Control over catenation in a pillared paddlewheel metal−organic framework was achieved via solventassisted linker exchange. The linker exchange was demonstrated on the noncatenated structure of DO-MOF, by using 4,4′-bipyridine (L4) and 4,4′-azobis(pyridine) (L5) as linkers, leading to noncatenated materials SALEM-3 and SALEM-4. The de novo synthesized analogues of SALEM-3 and SALEM4 can only be...
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