Cu2(pzdc)2L [L=dipyridyl-based ligands] porous coordination polymers: Hysteretic adsorption and diffusion kinetics of CO2 and CH4

Synthesis and Characterization of a Cu2(pzdc)2(bix) [pzdc: 2,3-pyrazinedicarboxylate; bix: 1,3-bis(imidazol-1-yl)benzene] Porous Coordination Pillared-Layer Network

“…IAST phase diagrams are shown in the Supporting Information file (FigureS2). For the case of 10/ 90 gas mixtures, Cu 2 (pzdc) 2 (bix) showcases a maximum IAST selectivity of 8.4 at 298 K and 1 atm, which is a 10% and 75% increase in comparison with selectivity values reported for Cu 2 (pzdc) 2 (bpy) and Cu 2 (pzdc) 2 (bpe), respectively, at similar temperature, pressure, and gas composition 32. ■ CONCLUSIONSA porous coordination pillared-layer network based on bis(imidazole) N-donor pillar ligand was synthesized and characterized.…”

“…These data were captured upon an equilibration time of 10 min for each point due to instrument usage logistics. However, our group has already shown that equilibration time intervals ( t e ) play an important role in the determination of actual structural relaxation upon changes induced by CO 2 adsorption; , the rate of structural expansion is smaller than the rate of adsorption and therefore the equilibrium adsorption amounts will increase simultaneous an increase t e . In an attempt to verify such behavior Cu 2 (pzdc) 2 (bix), we gathered CO 2 adsorption isotherm data at ambient temperature and pressures up to 7 atm using different t e values.…”

“…PCPs that contain copper nodes (Cu 2 (pzdc) 2 ( L ); i.e., L = dipyridyl-based ligand), sometimes known as CPL- n , were discovered by Kitagawa and co-workers. These manifold-like frameworks consist of 3-D structures that exhibit a 1-D pore channel system. ,− CPL- n materials have also been extensively studied by Hernandez-Maldonado and co-workers to establish relationships between chemical, structural, textural, and adsorption properties. − An interesting aspect of Cu 2 (pzdc) 2 ( L ) materials is the capability for tailoring the accessible surface for the uptake of light gases such as CO 2 . Functionalities arising from the pillar ligands provide a range of interactions with adsorbates; for instance, the presence of the carbonyl (CO) group in the ligand N -(4-pyridyl-isonicotinamide (pia) appears to enhance interactions between CO 2 and Cu 2 (pzdc) 2 (pia) at low loadings in comparison to the ligands 4,4-azopyridine (apy) or 1,2-di­(4-pyridil)-ethylene (bpe) …”

Lithium Functionalization Promoted by Amide-Containing Ligands of a Cu(pzdc)(pia) Porous Coordination Polymer for CO2 Adsorption Enhancement

“…PCPs exhibit properties that can be tailored to specific gas uptake requirements. These properties can be manipulated a priori through the rational selection of the factors that dictate the assembly route during synthesis or a posteriori through functionalization strategies. , For CO 2 adsorption applications, a group of pillared layer networks, i.e., [Cu 2+ x ( pzdc ) y ( L ) z ] n ( pzdc = pyrazine-2,3-dicarboxylate; L = ditopic ligand) − have been of interest due to their potential gas storage and separation capabilities and their stability at low to medium pressures, e.g., up to 6 atm at ambient temperature, broadening the pressure scope to design or optimize processes for CO 2 adsorption. − Although adsorption and desorption equilibrium tests exhibit a hysteretic behavior that varies according to the highest gas pressure attained before desorption, there is evidence of a structural response without degradation of the long-range periodicity and porosity. , Cu 2+ x ( pzdc ) y ( L ) z materials have favorable attributes, including one-pot crystallization under ambient conditions and conformation of one-dimensional channels with ligands that can accommodate functional groups along the pores. There is thus a strong motivation to upgrade the internal surface of PCPs or MOFs through chemical functionalization.…”

Coordination Polymers with 2D → 3D Interdigitated Arrays Based on 5‐(4‐(1H‐1,2,4‐Triazol‐1‐yl)phenyl)‐1H‐tetrazole: Syntheses, Structures, and Properties

“…In recent years, coordination polymers (CPs) have gained reasonable attention because of their diverse structures, intriguing topologies, and tunable dimensionalities, [1][2][3][4][5] meanwhile coordination polymers have emerged as a new platform for various applications such as gas storage and separation, [6][7][8][9] catalysis, [10][11][12] drug delivery, [13][14][15] sensors, [16][17][18] magnetism, [19][20][21] and optical properties. [22,23] With this trend, the rational design and synthesis of CPs has aroused as essential issue, especially on molecular level.…”