Porosity regulation of metal–organic frameworks for high proton conductivity by rational ligand design: mono- versus disulfonyl-4,4′-biphenyldicarboxylic acid

Abstract

Porous crystalline metal-organic frameworks (MOFs) bearing sulfonic groups (–SO3H) are receiving increasing attention as solid-state proton-conductors because the –SO3H group can not only enhance the proton concentration but also form...

A High‐Nuclear Isopolymolybdate Cluster Assembled with an Anionic [{Mo24O48(OMe)32}]8−and Two Charge‐Neutral [{Mo24O52(OMe)28}] Cages

“…The high activation energy should be attributed to the increasing number of water molecules adsorbed and the strengthened hydrogen bond network, which is more conducive to proton transport. The adsorbed water molecules can function as proton carriers to transport protons and complete the whole conduction process with the movement of the carriers [40–43] . Besides, the proton conductivity study implies cluster 1 possesses good proton conduction capability.…”

“…The adsorbed water molecules can function as proton carriers to transport protons and complete the whole conduction process with the movement of the carriers. [40][41][42][43] Besides, the proton conductivity study implies cluster 1 possesses good proton conduction capability. Furthermore, the PXRD curve of proton conductivity measured by powder X-ray diffraction is consistent with the original curve, further validating the structural stability of cluster 1 (Figure S10).…”

Multifunctional Dinuclear Dy-Based Coordination Complex Showing Visible Photoluminescence, Single-Molecule Magnet Behavior, and Proton Conduction

“…As shown in Figures 5a,b, S4, and S5, the Nyquist plots are composed of semicircles in the high frequency region and tilted tails in the low frequency region, with a representative proton transfer feature of 1. 66,67 At a fixed temperature of 25 °C, the proton conductivity values of 1 are 7.69 × 10 −9 S cm −1 under 60% RH and 1.37 × 10 −6 S cm −1 under 100% RH, displaying a significant increasing trend with increasing humidity (Table S3 and Figure S6). The result is similar to that of the reported water-assisted proton conductive materials.…”

Syntheses, crystal structures and thermal decomposition studies of two novel Mn(ii)-MOFs with tetrazole-based carboxylic acids

“…Consequently, the multi-functional MOFs with different dimensions (1D-3D) and interesting properties (luminescent sensing, dye adsorption, photocatalysis and proton conduction) may be constructed from the ligands and different metal ions. [3][4][5][6][7][8][9][10] In our previous work, a series of tetrazole-based carboxylic acids such as N-(1-carboxymethyltetrazole-5-yl)-N-(2 0 -carboxymethyltetrazole-5 0 -yl)amine, 11,12 1,3-bis(2-carboxymethyltetrazol-5-yl) benzene (H 2 L 1 ), [13][14][15] 1,4-bis(2-carboxymethyltetrazol-5-yl)benzene, 16 1,3,5-tri(2-carboxymethyltetrazol-5-yl)benzene, 2,14,[17][18][19] and 2-(5-(3pyridyl)tetrazol-2-yl)propionic acid (HL 2 ) [20][21][22][23][24] have been designed and successfully prepared. Their MOFs with Mg(II), Ca(II), Sr(II), Ba(II), Pb(II), Mn(II), Co(II), Zn(II), and Cd(II) ions have been synthesized and the related properties like luminescence, 2,11,16 thermal decomposition, 13,16,17,20,21,24 proton conduction 2 and anticancer activity 22,23,25 have also been researched.…”

“…Consequently, the multi-functional MOFs with different dimensions (1D–3D) and interesting properties (luminescent sensing, dye adsorption, photocatalysis and proton conduction) may be constructed from the ligands and different metal ions. 3–10…”