Hybrid ultramicroporous materials (HUMs) with enhanced stability and trace carbon capture performance

Abstract

Fine-tuning of HUMs through pillar substitution can significantly enhance trace CO sorption performance and stability. The resulting materials, exemplified by the new material TIFSIX-3-Ni, [Ni(pyrazine)(TiF)], are shown through temperature programmed desorption experiments to remove trace quantities of CO from moist gas mixtures.

Highly efficient separation of linear and branched C4 isomers with a tailor‐made metal–organic framework

“…The unit cell of ZU‐36‐Co is a = b = 7.09, c = 7.76, obtained via PXRD Rietveld refinements, which is larger than that of TIFSIX‐3‐Ni ( a = b = 6.998, c = 7.79) 5 . It is clearly shown that the characteristic peaks of the PXRD patterns are quite consistent with those calculated from the refinement structure of ZU‐36‐Co, indicating the high purity of the bulk products as synthesized.…”

“…The pink powders were heated at 140°C for 24 hr under vacuum conditions to obtain ZU‐36‐Co materials. TIFSIX‐3‐Ni was synthesized according to the literature by Kumar et al 5 …”

A Single‐Molecule Propyne Trap: Highly Efficient Removal of Propyne from Propylene with Anion‐Pillared Ultramicroporous Materials

“…Therefore, the development of new materials for energy‐efficient separation of C 3 H 4 from C 3 H 6 is of great significance. Actually, the design of functional materials with both high selectivity and uptake at ultralow concentration for the removal of trace impurity gas is a common challenge for various gas separation and purification processes, including CO 2 capture, SO 2 removal, NH 3 separation, and so on. The removal of trace C 3 H 4 from C 3 H 6 is particularly difficult due to their similar molecular structures.…”

The effect of centred versus offset interpenetration on C2H2 sorption in hybrid ultramicroporous materials

“…Previous studies have indicated that TiF 6 2pillars exhibit greater electrostatic interactions with C 2 H 2 or CO 2 molecules than SiF 6 2pillars. 12,22,31 Electronic structure calculations on SIFSIX-2-Cu-i and TIFSIX-2-Cu-i indicate that the magnitude of the partial negative charge for the equatorial F atoms is greater in TIFSIX-Cu-i (see ESI, Table S6). C 2 H 2 /C 2 H 4 separation selectivity (S AE ) was determined using ideal adsorbed solution theory (IAST) calculations 30 to address gas mixture (1/99) separations.…”