Aqueous Molecular Sieving and Strong Gas Adsorption in Highly Porous MOFs with a Facile Synthesis

Abstract

Aqueous molecular sieving is demonstrated in a new series of isostructural metal organic frameworks based on the perylene tetracarboxylate (PTC) ligand. The frameworks can be formed in water at room temperature with Mg, Ni, and other first row transition metal ions and adopt a highly porous topology that results in predicted surface areas of over 2000 m 2 g −1 and periodic channels of around 6 Å in diameter. Unusually, the M-PTC MOFs are highly resistant to moisture and can be readily synthesized on multigram scales. The frameworks have been shown to exhibit molecular sieving in the absorption from mixtures of organic molecules at low aqueous concentrations, with an application demonstrated on a dangerous water-borne herbicide, Paraquat. Ni-PTC also exhibits a structural flexibility that leads to strong and selective gas adsorption characteristics, with an IAST selectivity of 300 for carbon dioxide being adsorbed over nitrogen. Binding enthalpies for hydrogen and carbon dioxide are also very strong in comparison to other MOFs, at 10.75 and 52.50 kJ/mol respectively.

Potassium-neutralized perylene derivative (K4PTC) and rGO-K4PTC composite as effective and inexpensive electron transport layers for polymer solar cells

“…Preparation of K 4 PTC (potassium salt of perylene-3,4,9,10-tetracarboxylate) K 4 PTC was prepared according to the previously reported method [32]. In details, perylene p-dianhydride (5.0 g, 0.013 mol) was mixed with a 2 M aqueous KOH solution with a molar ratio of ca.…”

“…In a typical experiment, K 4 PTC was readily synthesized via a simple hydrolysis reaction [32]. rGO was produced by reducing GO that was prepared using the modified Hummers method [33].…”

Composite membranes with hydrophilic nanopores derived from the self-assembly of block copolymer supramolecular complexes

“…MB and BSA. The hydrodynamic radius of MB is 0.5 nm [31], while that of BSA is approximately 3.5 nm [32], thus according to these values both molecules should cross the membrane. In Fig.…”

Application of metal and metal oxide nanoparticles@MOFs

“…MOFs have shown great potential for the removal of carcinogenic polycyclic aromatic hysdrocarbons (PAHs), heavy metals, pesticides, dyes, radionucludes and other toxic chemicals [159][160][161][162][163][164][165]. Introducing additional functionality via magnetic nanoparticles can be achieved by synthesising magnetic framework composites (MFCs) [166].…”