Two comparable Ba-MOFs with similar linkers for enhanced CO2 capture and separation by introducing N-rich groups

Abstract

Two new different metal-organic frameworks (MOFs) [Ba(L1)(H 2 O) 2 ] n ÁnH 2 O (MOF 1) and [Ba(L2)(-H 2 O) 2 ] n Á0.5nDMFÁ0.5nH 2 O (MOF 2) were yielded by the assembly of oxygen-friendly Ba(II) ions and two similar linkers, namely 2-(imidazol-1-yl)terephthalic acid (H 2 L1) and 2Single-crystal X-ray diffractions (XRD) indicate that MOF 1 is a new three-dimensional (3D) stacking dense network formed by the one-dimensional (1D) rod-shaped chains and L1 linkers, whereas MOF 2 presents a 3D nanotube porous framework with cylindrical tunnels based on the 1D loop chains as the secondary building units (SBUs) by replacing the imidazole group in H 2 L1 with the triazole group in H 2 L2. As a result, MOF 2 has a higher density of active sites and Lewis acid sites in the porous surface of nanotube than MOF 1. Thereby, the CO 2 capture and separation capacity of MOF 2 is great higher than that of CH 4 at 298 K.

Highly pH-Stable Ln-MOFs as Sensitive and Recyclable Multifunctional Materials: Luminescent Probe, Tunable Luminescent, and Photocatalytic Performance

“…Comparing with MOFs based on transition metal, the Ln-MOFs have more powerful performances, such as molecular magnetism, photoluminescence, − gas storage/separation, − proton conductivity, and catalysis . Because of particular luminescence properties such as high quantum yield, long luminescent lifetime, narrow and strong band emission, and large Stokes shift, − Ln-MOFs, especially Eu and Tb-MOFs exhibit great potentiality in environmental monitoring.…”

Porous functional metal–organic frameworks (MOFs) constructed from different N-heterocyclic carboxylic ligands for gas adsorption/separation

“…The application of gas adsorption and separation is significantly influenced by the choice of the adsorbent. 13,14 It is extremely crucial to investigate functional materials with great adsorption and selectivity. 15,16…”

Reversible luminescence tuning behavior in a thermal-stimuli-responsive anthracene-based coordination polymer

“…32,33 However, no systematic investigations on how such properties are affected by structural changes have been conducted, because the structures of most MOFs are difficult to control after thermal stimulation, and these materials usually have amorphous states. [34][35][36] As a consequence, the dynamic structural changes cannot be directly observed due to the lack of single-crystal data and effective characterization tools. Thus, we designed a thermal-stimulus-responsive material to perform a systematic mechanism study of the correlation between luminescence and structural changes arising from the thermal stimuli.…”