Two stable phenyl acyl thiourea carboxylate-based MOFs: Syntheses, crystal structures and proton conductive properties

Xie, Lexing; Ye, Zhe-Jun; Zhang, Xudong; Li, Gang

doi:10.1016/j.jssc.2022.123154

Cited by 17 publications

(12 citation statements)

References 73 publications

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“…At 100 °C, the conductivities span by 2–3 orders of magnitude from low temperature to high temperature and reach the highest values of 5.09 × 10 –3 S·cm –1 for 1 and 3.41 × 10 –3 S·cm –1 for 2 , which are well comparable to the reported complexes using N -heterocyclic carboxylic acid ligands as building blocks (Table ). As stated in Table , although the optimal σ values of these two compounds are lower than that of some carboxylic acid-based materials, ,,− they still exceed the proton conductivity of most carboxylic acid-based MOFs and are still in the ranks of high-proton-conductivity materials. ,− The σ values of 1 and 2 are also excellent compared to those of similar compounds constructed by the zwitterionic ligands in the literature. ,− This evinces the structural superiority of such compounds in terms of proton conductivity, which is the advantage of the ligands adopted.…”

Section: Resultsmentioning

confidence: 89%

High Water-Assisted Proton Conductivities of Two Cadmium(II) Complexes Constructed from Zwitterionic Ligands

et al. 2022

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Finding more metal complexes with outstanding water stability and high proton conductivity still has important research significance for the energy field. Herein, two highly proton-conductive complexes, one hydrogen-bonded supramolecular framework (HSF) [Cd(CBIA) 2 (H 2 O) 4 ]•2H 2 O (1) and one coordination polymer (CP), {[Cd 2 (CBIA) 2 (4,4′-bipy) 2 (H 2 O) 2 ]• (CBIA)•(OH)•2H 2 O} n (2) (4,4′-bipy = 4,4′-bipyridine), were triumphantly assembled using a zwitterionic organic compound, 2-(1-(carboxymethyl)-1H-benzo[d]imidazol-3-ium-3-yl)acetate (HCBIA).In the structure of HSF 1, there are several coordination and lattice H 2 O units except for the two monodentate CBIA − anions. CP 2 with a one-dimensional (1D) cylindrical structure has free CBIA − units and free H 2 O units located in the cavity. Thanks to the ability of the uncoordinated carboxyl groups and coordination/ lattice water molecules to construct the rich H-bonding networks, both complexes exhibit super-high proton conductivities, reaching 5.09 × 10 −3 and 3.41 × 10 −3 S cm −1 under 100 °C/98% relative humidity (RH), respectively. Based on the exploration of crystal structure data, combined with the calculated activation energy, and adsorption/desorption plots of nitrogen and water vapor, the causes and differences in proton conductivity of the two complexes, especially the proton-conductive mechanism, are compared and analyzed. This study again confirms that the zwitterionic ligands can exert important effects on forming organo-inorganic hybrid materials with high proton conductivity.

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Section: Resultsmentioning

confidence: 89%

High Water-Assisted Proton Conductivities of Two Cadmium(II) Complexes Constructed from Zwitterionic Ligands

et al. 2022

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“…Analogous observations have been reported in other vanadoborates or MOFs-based proton-conducting materials. 23,40,41 Even though the proton conductivity of 8.82 × 10 −4 S cm −1 is not too high, but it is comparable with that of many well-studied MOFs-based proton conductive materials, such as Ni-MOFs/PAN ( σ = 6.049 × 10 −5 S cm −1 at 363 K 90% RH), 42 [Cd(p-TIPhH 2 IDC) 2 (H 2 O)] n ( σ = 1.24 × 10 −4 S cm −1 at 373 K 98% RH), 43 Mn(H 2 BBT) 2 (H 2 O) 2 ] n ( σ = 1.69 × 10 −5 S cm −1 at 373 K 98% RH), 44 etc. XRD patterns of 1 were also recorded after humidity- and temperature-dependent tests for confirming its structural integrity, in which the main peaks match well with the simulated one, suggesting that our compound could maintain its framework stability during the proton conduction (Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and proton conducting ability of a crystalline 3-D vanadoborate with [V₆B₂₀] architectures

Liu¹,

Wang²,

Guo³

et al. 2023

New J. Chem.

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“…In addition, ionothermal synthesis [ 65 ], the solvent evaporation method [ 66 ], and the post-synthetic modification method [ 67 ] are also commonly employed in the synthesis, structural modulation, and performance improvement of MOFs.…”

Section: Synthesis Characterization and Performance Evaluation Of Mof...mentioning

confidence: 99%

Advancements of MOFs in the Field of Propane Oxidative Dehydrogenation for Propylene Production

Li,

Ke,

Zhang

et al. 2024

Molecules

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Compared to the currently widely used propane dehydrogenation process for propylene production, propane oxidative dehydrogenation (ODHP) offers the advantage of no thermodynamic limitations and lower energy consumption. However, a major challenge in ODHP is the occurrence of undesired over-oxidation reactions of propylene, which reduce selectivity and hinder industrialization. MOFs possess a large number of metal sites that can serve as catalytic centers, which facilitates the easier access of reactants to the catalytic centers for reaction. Additionally, their flexible framework structure allows for easier adjustment of their pores compared to metal oxides and molecular sieves, which is advantageous for the diffusion of products within the framework. This property reduces the likelihood of prolonged contact between the generated propylene and the catalytic centers, thus minimizing the possibility of over-oxidation. The research on MOF catalyzed oxidative dehydrogenation of propane (ODHP) mainly focuses on the catalytic properties of MOFs with cobalt oxygen sites and boron oxygen sites. The advantages of cobalt oxygen site MOFs include significantly reduced energy consumption, enabling catalytic reactions at temperatures of 230 °C and below, while boron oxygen site MOFs exhibit high conversion rates and selectivity, albeit requiring higher temperatures. The explicit structure of MOFs facilitates the mechanistic study of these sites, enabling further optimization of catalysts. This paper provides an overview of the recent progress in utilizing MOFs as catalysts for ODHP and explores how they promote progress in ODHP catalysis. Finally, the challenges and future prospects of MOFs in the field of ODHP reactions are discussed.

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Two stable phenyl acyl thiourea carboxylate-based MOFs: Syntheses, crystal structures and proton conductive properties

Cited by 17 publications

References 73 publications

High Water-Assisted Proton Conductivities of Two Cadmium(II) Complexes Constructed from Zwitterionic Ligands

High Water-Assisted Proton Conductivities of Two Cadmium(II) Complexes Constructed from Zwitterionic Ligands

Synthesis and proton conducting ability of a crystalline 3-D vanadoborate with [V₆B₂₀] architectures

Advancements of MOFs in the Field of Propane Oxidative Dehydrogenation for Propylene Production

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Two stable phenyl acyl thiourea carboxylate-based MOFs: Syntheses, crystal structures and proton conductive properties

Cited by 17 publications

References 73 publications

High Water-Assisted Proton Conductivities of Two Cadmium(II) Complexes Constructed from Zwitterionic Ligands

High Water-Assisted Proton Conductivities of Two Cadmium(II) Complexes Constructed from Zwitterionic Ligands

Synthesis and proton conducting ability of a crystalline 3-D vanadoborate with [V6B20] architectures

Advancements of MOFs in the Field of Propane Oxidative Dehydrogenation for Propylene Production

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Synthesis and proton conducting ability of a crystalline 3-D vanadoborate with [V₆B₂₀] architectures