A temperature-responsive smart molecular gate in a metal–organic framework for task-specific gas separation

Abstract

The size of a smart molecular gate can be continuously tuned from 3.6 to 5.2 Å for gas separation.

Metal‐Organic Framework Materials for Light Hydrocarbon Separation

“…As shown in Figure 10, Tan and his colleagues introduced a thermally responsive methoxy group into a rugged Al-MOF to construct a smart molecular gate. [42] As shown in Figure 10c, the functionalized CAU-10-OMe is a square and sinusoidal channel formed by the organic linker 5-methoxyphthalic acid and AlO 6 -polyhedral spiral chains. the onedimensional channel can be used as an intelligent gate for molecular recognition.…”

“…How to continuously fine‐tune the sub‐angstrom pores in porous materials is still a challenge. As shown in Figure 10, Tan and his colleagues introduced a thermally responsive methoxy group into a rugged Al‐MOF to construct a smart molecular gate [42] . As shown in Figure 10c, the functionalized CAU‐10‐OMe is a square and sinusoidal channel formed by the organic linker 5‐methoxyphthalic acid and AlO 6 ‐ polyhedral spiral chains.…”

Efficient separation of 1,3‐butadiene fromC4hydrocarbons by flexible metal–organic framework with gate‐opening effect

“…As an emerging advanced adsorbent, metal–organic frameworks (MOFs) are attracting more and more attention by virtue of their multifarious structural topologies, precise structural determination, and tunability of pore surface functionalities 14–16 . In recent years, MOFs have been widely applied to various separation applications, including CO 2 capture, 17 propane–propylene separation, 18,19 hydrogen storage, 20 and so on 21–25 . From the point of view of the adsorption mechanism, the efficient separation of gas mixtures by MOFs adsorbents usually depends on the thermodynamic separation based on interaction force, 26,27 kinetic separation determined by adsorption rate, 28–30 molecular sieving separation, 31,32 and gate‐opening flexible separation 33,34 .…”

Two isostructural metal–organic frameworks with unique nickel clusters for C2H2/C2H6/C2H4 mixture separation

“…7 Postsynthetic metalation of such chelating sites such as bipyridine, phenanthroline and BINAP results in highly efficient catalysts 8 or magnetic materials. 9 MOFs for olen separation from paraffin through p complexation [10][11][12] at open metal sites or sieving effect [13][14][15] have been extensively explored due to the promise of tremendous energy saving through adsorptive separation as compared with cryogenic distillation. Recently, ethane selective sorbents including MOFs and HOFs (hydrogen bonded organic frameworks) have emerged and yield high purity ethylene in a onestep separation from C 2 H 6 /C 2 H 4 , [16][17][18][19][20][21][22][23][24][25] 33 and 34) mixtures.…”