A Microporous Titanate‐Based Metal‐Organic Framework for Efficient Separation of Acetylene from Carbon Dioxide

Abstract

Separation of acetylene (C 2 H 2 ) and carbon dioxide (CO 2 ) is of prime importance in the petrochemical industry, but their similarities in molecular size and volatility make it particularly difficult. A desired adsorbent for highly efficient C 2 H 2 /CO 2 separation should have high selectivity and C 2 H 2 uptake simultaneously, and the introduction of functional groups into MOFs is an effective strategy to achieve this purpose. Herein, we report a titanium-based MOF material (MIL-125-NH 2 ), featuring the suitable pore sizes and amino-functionalized pore surfaces to show the preferential adsorption of C 2 H 2 over CO 2 with both high C 2 H 2 uptake and C 2 H 2 /CO 2 selectivity. Theoretical simulation results indicate that the preferential C 2 H 2 adsorption is mainly attributed to multiple hydrogen bonding interactions between C 2 H 2 molecule and amino functional groups.

Unravelling gas sorption in the aluminum metal‐organic framework CAU‐23: CO2, H2, CH4, SO2 sorption isotherms, enthalpy of adsorption and mixed‐adsorptive calculations

“…Metal-organic frameworks (MOFs) are coordination networks, that consist of metal nodes and bridging organic linkers with a wide structural diversity. [1][2][3] MOFs are mainly interesting due to their porosity for a variety of potential applications and properties, e. g. gas sorption and separation, [4][5][6][7][8][9] catalysis, [10,11] luminescence, [12][13][14] conductivity. [15] MOFs can be obtained through various synthesis routes, [16] for example under solvothermal, [17] or reflux conditions using microwave-assisted heating, [18] electrochemical, [19] or mechanochemical energy input, with variation of metal precursor, solvent, concentration or the presence of modulators.…”

Tuning topological networks in MOFs by secondary‐building‐unit connection: syntheses, structures and luminescent properties of two Zn4‐cluster coordination polymers

“…It is well-known that decades of progress in CP chemistry flourishes a new branch, namely metal-organic frameworks (MOFs) with secondary building units (SBUs). [8][9][10][11][12][13][14][15][16][17][18][19] Success in employing building-block strategy is indeed beneficial to the rigid behavior of the resultant frameworks. [20][21] Therefore, it is very easy for us to tailor their robust frameworks into a series of isoreticular MOFs.…”

New Energetic Metal‐Organic Framework (E‐MOF) based on a sodium(I)‐containing energetic metal salt incorporating guanidinium ions

“…The properties (decomposition temperature, detonation parameters and so on) of E-MOF materials can be modulated by strategically selecting the ligands, coordination atoms and other cations used in the synthesis of the E-MOFs, [15] therefore, E-MOFs have great potential advantages to generate more stable materials with high detonation properties of applying to the diverse application fields of MOFs that have been explored up to date such as gas storage and separation. [16][17][18][19][20] Therefore, because the energetics of the nitrogen-rich ligand directly affect the energetics of the entire E-MOF, choosing an appropriate nitrogen-rich ligand with highlyefficient detonation properties as the ligand is advantageous for the preparation of highly energetic E-MOFs. Some of the materials of previously reported E-MOFs are presented in Figure 1.…”

“…Energetic MOFs (E‐MOFs) are composed of metal ions and energetic bidentate and/or multidentate ligands. The properties (decomposition temperature, detonation parameters and so on) of E‐MOF materials can be modulated by strategically selecting the ligands, coordination atoms and other cations used in the synthesis of the E‐MOFs, [15] therefore, E‐MOFs have great potential advantages to generate more stable materials with high detonation properties of applying to the diverse application fields of MOFs that have been explored up to date such as gas storage and separation [16–20] …”