rtl-M-MOFs (M = Cu, Zn) with a T-shaped bifunctional pyrazole-isophthalate ligand showing flexibility and S-shaped Type F-IV sorption isotherms with high saturation uptakes for M = Cu

Abstract

The flexible, activated MOF rtl-[Cu(HIsa-az-dmpz)] undergoes a reversible phase change into a closed form with gate opening at cryogenic temperatures for N2 and CO2.

Tuning the Gate‐Opening Pressure in a Switching pcu Coordination Network, X‐pcu‐5‐Zn, by Pillar‐Ligand Substitution

“…All four β forms were found to exhibit type‐F‐IV isotherms with saturation uptakes of 254, 245, 267, and 243 cm 3 g −1 at 1 bar and gate opening at P / P 0 =0.30, 0.17, 0.33, and 0.39 for X‐pcu‐5‐Zn , X‐pcu‐6‐Zn , X‐pcu‐7‐Zn and X‐pcu‐8‐Zn , respectively. To the best of our knowledge, only two other FMOMs exhibit CO 2 saturation uptakes >200 cm 3 g −1 with type‐F‐IV isotherms (Table S17) . Langmuir surface areas for the α forms calculated from the CO 2 sorption isotherms at 195 K are 1318, 1163, 1362, and 1375 cm 2 g −1 , respectively.…”

Synthesis of a Chiral 3,6T22-Zn-MOF with a T-Shaped Bifunctional Pyrazole-Isophthalate Ligand Following the Principles of the Supramolecular Building Layer Approach

“…This strategy has been termed ‘ligand-to-axial pillaring’ by Eubank et al based on the utilization of T-shaped bifunctional ligands that function as a 3-c node [ 4 , 10 ]. Using this strategy, a plethora of 3,6-c connected MOFs, with topologies such as apo (α-PO2), [ 10 ] eea (based on the Kagomé-lattice ( kgm )) [ 10 , 11 , 12 ], pyr (pyrite) [ 12 ] and rtl (rutile) [ 10 , 12 , 13 , 14 ], have been synthesized.…”

“…Among the utilized bifunctional T-shaped ligands to synthesize these 3,6-c connected MOFs the pyrazole-carboxylate ligands have some especially interesting properties compared to the more commonly used pyridine–carboxylate ligands, since they have an additional NH-function, which can act as an additional interaction site [ 13 , 15 ]. 5-(Pyrazole-4-yl)isophthalic acid (H 3 Isa-pz) ( Scheme 1 ), as the simplest T-shaped pyrazole-carboxylate ligand, has been used by Ma et al to synthesize rht -MOF-pyr.…”

Transition Metal–organic Coordination Polymers Containing 6‐(1H‐imidazol‐1‐yl)‐2(1H)‐Pyridinone: Synthesis, Structure and Fluorescent Sensing for Enoxacin

“…CPs have a diversity of structures since multiple coordination environments of transition metal ions. For example, Zn, Cu, Cd, Ni, and Co can adopt four‐, five‐, or six‐coordinate geometries, leading to the extended CPs from 1D to 3D dimensionality However, CPs based on the transition metal ions without unpaired electrons, especially those with d 10 configurations of Zn/Cd, can yield linker‐based high emission . So, the Zn/Cd‐luminescence coordination polymers were studied for luminescence sensing of the analytes .…”

“…These materials have already shown potential applications in adsorption, separation, catalysis, luminescence and chemical sensing, etc . The structures of CPs vary from 1D to 3D extended frameworks, including open or porous structures . The CPs are often obtained by means of secondary building units (SBUs) and multitopic ligands, the connections between linkers and metal ions could extend in space and form the coordination frameworks .…”