Utilization of counter anions for charge transportation in the electrical device fabrication of Zn(<scp>ii</scp>) metal–organic frameworks

Das, Kaustav; Pal, Baishakhi; Saha, Sayan; Akhtar, Sohel; De, Avik; Ray, Partha Pratim; Mondal, Raju

doi:10.1039/d0dt02589e

Cited by 10 publications

(8 citation statements)

References 61 publications

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“…Electronic conductivity is also a critical factor for a MOF's utility for fast EES, but few MOFs with simultaneous ionic and electronic conductivity have been reported. 85,86 A possible strategy to obtain such dualconducting MOFs would be to incorporate moieties known to support ion conduction (described above) into electronically conductive MOFs. However, it is critical to consider the negative effects of introducing redox inactive moieties on theoretical and experimental capacity (Figure 3d).…”

Section: Design Of Mofs For Fast Electrochemical Energy Storagementioning

confidence: 99%

Metal-organic frameworks for fast electrochemical energy storage: Mechanisms and opportunities

Hong

Crom

Feldblyum

et al. 2023

Chem

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Section: Design Of Mofs For Fast Electrochemical Energy Storagementioning

confidence: 99%

Metal-organic frameworks for fast electrochemical energy storage: Mechanisms and opportunities

Hong

Crom

Feldblyum

et al. 2023

Chem

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“…To fit the impedance plots by using equivalent circuit the Z-fit (EC-Lab) software was used. We have calculated the proton conductivity (σ p ) from the bulk resistance (R b ) by using following equation (11):…”

Section: Magnetic Studymentioning

confidence: 99%

“…[9,10] The above metalspecific properties literally depend on the characteristic features of the metal centre or metal-ligand bond and more often than not found to be independent of the state of the matter. [11] The possibility of using the original as-synthesized state of the material offers manifold strategic, financial and logistic advantages and had lead the metallogels at the forefront to the field of inorganic functional materials. [12,13] Furthermore, development of multifunctional innovative materials through culminating various features is receiving increased attention.…”

Section: Introductionmentioning

confidence: 99%

“…The introduction of the metal, capable of forming stronger coordination bonds, not only leads to stronger and stable gel network but also induce many metal‐specific physiochemical properties like magnetism or catalysis into the system [9,10] . The above metal‐specific properties literally depend on the characteristic features of the metal centre or metal‐ligand bond and more often than not found to be independent of the state of the matter [11] …”

Section: Introductionmentioning

confidence: 99%

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Design of Dual Purpose Fe‐metallogel for Magnetic Refrigeration and Fabrication of Schottky Barrier Diode

et al. 2022

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The impetus for the present work was to design multifunctional inorganic materials that can be utilized in their original assynthesized state of the matter. Accordingly, we have successfully designed a benzene-tricarboxylic acid based dual-purpose Fe-metallogel that can be used as an efficient material for cryogenic magnetic cooling as well as electronic device fabrication as Schottky barrier diode in their original gel state. The metallogel shows remarkable mechanical strength, selfsustainability and thixotropic behaviour. The gel sample has been thoroughly characterized using IR, UV-Vis spectroscopy, SEM, TEM, AFM techniques, XPS and Mössbauer spectroscopy. The porous nature, which forms the basis of the current gel based MCE study and SBD fabrication, was confirmed with gas sorption data. The porous metallogel network with by-default entrapped anion and protic solvents of the fabricated electrical device provides an excellent platform for charge transportation with a corroborating conductivity value of 4.53 × 10 À 6 Sm À 1 . As if to complement the notion of multifunctional material, the magnetic studies on the Fe-gel show significant cryogenic magnetic cooling behaviour. The theoretical result calculated using DFT are found to be highly consistent with the experimental results of the metallogel. Furthermore, we have evaluated the potential of the compound as a fuel cell membrane with detailed proton conductivity measurements on the xerogel, showing an encouraging value of 4.58 × 10 À 4 S/ cmat 95 % relative humidity and 75 °C temperature.

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“…Notwithstanding their unprecedented fanfare as the next big thing in the field of alternative energy, metal–organic frameworks (MOFs) remain a highly interesting class of multifunctional inorganic polymeric materials . The unique blend of mutually inclusive features of inorganic chemistry, polymer science, and porous materials makes a paradigm shift for MOFs, in terms of exploiting the same benefits of precise and meticulous synthetic fundamentals but diversifying the outlook of commercial or industrial interests with a widening range of applications encompassing catalysis, magnetism, sensing, electrical device fabrications, biomedical utilities. − In the early years, the researchers, in pursuit of porous absorbent materials, were more interested in optimizing and improving the physical features of MOFs like pore size, surface area, dimensionality, or topology . Subsequently, the investigations were more focused on the resultant empty space or the surface features of the network and less on what these networks were actually made of, viz., the organic functional groups of the linker and nodal metal ions .…”

Section: Introductionmentioning

confidence: 99%

Magnetic and Electric Properties of Pyrazole-Based Metal–Organic Frameworks Grafted With a Sulfonic Moiety

Saha

Das

et al. 2023

Crystal Growth & Design

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We report herein two multifunctional metal–organic frameworks (MOFs) that exhibit excellent mutually inclusive electrical and magnetic properties. Accordingly, two cobalt and nickel based MOFs (Co-MOF, Ni-MOF) were generated using a flexible bispyrazole based ligand and 2-sulphono terephthalic acid. The idea is to generate paramagnetic metal ion based magnetic MOFs, which can also be used to fabricate electrical devices by utilizing the immobilized free sulfonic groups and encapsulated H-bonded water clusters for active charge species generation and transportation. Further support comes from the intriguing structural features of the MOFs that include extensive H-bonded water clusters, free sulfonic acid moiety, or syn-anti bridged carboxylates, which make them highly suitable candidates for generating electrical and magnetic materials. Further complementary support for their candidature comes from the high thermal, chemical, and physical stability of the MOFs. The impedance spectroscopy data and I–V results unequivocally support the suitability of the MOFs for electronic device fabrication showing a befitting conductivity value of 1.80 × 10–4 S/m with an ideality factor of 1.06 for Ni-MOF. Interestingly, the Co-MOF shows a light-dependent behavior with conductivity values of 9.09 × 10–5 S/m (dark) and 6.31 × 10–4 S/m (light) and ideality factors of 0.78 (dark) and 0.92 (light). The MOFs, fitted with a free sulfonic acid moiety and extensive H-bonded water clusters, show high potential for proton exchange membrane fuel cells (PEMFCs) development with corroborating proton conductivity values of 1.95× 10–3 S/cm and 5.80 × 10–4 S/cm for Ni-MOF and Co-MOF, respectively, at 95% relative humidity and 85 °C. Moreover, the interesting structural aspects like syn-anti bridged carboxylates prompt us to explore the magnetic behavior of the MOFs. The Ni-MOF shows some interesting antiferromagnetic behavior. The Co-MOF reveals intriguing single molecule magnet behavior with a U eff value of 34 K and moderate relaxation time of 3.5× 10–8 s.

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Utilization of counter anions for charge transportation in the electrical device fabrication of Zn(ii) metal–organic frameworks

Abstract: The present work reports anion-induced electrical device fabrication of Zn(II) metal-organic frameworks. The essence of our electronic device fabrication is to utilize the anionic species entrapped inside of the three-dimensional...

Cited by 10 publications

References 61 publications

Metal-organic frameworks for fast electrochemical energy storage: Mechanisms and opportunities

Metal-organic frameworks for fast electrochemical energy storage: Mechanisms and opportunities

Design of Dual Purpose Fe‐metallogel for Magnetic Refrigeration and Fabrication of Schottky Barrier Diode

Magnetic and Electric Properties of Pyrazole-Based Metal–Organic Frameworks Grafted With a Sulfonic Moiety

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