scholarly journals Electrically Conductive Metal–Organic Frameworks for Electrocatalytic Applications

2021 ◽  
pp. 2100100
Author(s):  
Li Liu ◽  
Qiang Xu ◽  
Qi-Long Zhu
Keyword(s):  
Metal Organic Frameworks ◽  
Electrically Conductive ◽  
Metal Organic

scholarly journals Insights into the electric double-layer capacitance of two-dimensional electrically conductive metal-organic frameworks

2021 ◽  
Author(s):  
Jamie W. Gittins ◽  
Chloe J. Balhatchet ◽  
Yuan Chen ◽  
Cheng Liu ◽  
David G. Madden ◽  
...  
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Electrode Materials ◽  
Metal Organic Frameworks ◽  
Significant Finding ◽  
Two Dimensional ◽  
Electrically Conductive ◽  
Capacitive Performance ◽  
Metal Organic ◽  
Organic Linker

Two-dimensional electrically conductive metal-organic frameworks (MOFs) have emerged as promising model electrodes for use in electric double-layer capacitors (EDLCs). However, a number of fundamental questions about the behaviour of this class of materials in EDLCs remain unanswered, including the effect of the identity of the metal node and organic linker molecule on capacitive performance and the limitations of current conductive MOFs in these devices relative to traditional activated carbon electrode materials. Herein, we address both these questions via a detailed study of the capacitive performance of the framework Cu<sub>3</sub>(HHTP)<sub>2</sub> (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) with an acetonitrile-based electrolyte, finding a specific capacitance of 110 – 114 F g<sup>−1</sup> at current densities of 0.04 – 0.05 A g<sup>−1</sup> and a modest rate capability. By, directly comparing its performance with the previously reported analogue, Ni<sub>3</sub>(HITP)<sub>2</sub> (HITP = 2,3,6,7,10,11-hexaiminotriphenylene), we illustrate that capacitive performance is largely independent of the identity of the metal node and organic linker molecule in these nearly isostructural MOFs. Importantly, this result suggests that EDLC performance in general is uniquely defined by the 3D structure of the electrodes and the electrolyte, a significant finding not demonstrated using traditional electrode materials. Finally, we probe the limitations of Cu<sub>3</sub>(HHTP)<sub>2</sub> in EDLCs, finding a limited cell voltage window of 1.3 V and only a modest capacitance retention of 81 % over 30,000 cycles, both significantly lower than state-of-the-art porous carbons. These important insights will aid the design of future conductive MOFs with greater EDLC performances.

Pressure-induced metallicity and piezoreductive transition of metal-centres in conductive 2-dimensional metal–organic frameworks

2019 ◽  
Vol 21 (46) ◽  
pp. 25773-25778
Author(s):  
Khoa N. Le ◽  
Christopher H. Hendon
Keyword(s):  
Electronic Structure ◽  
Metal Organic Frameworks ◽  
External Pressure ◽  
Electrically Conductive ◽  
Metal Organic

The electronic structure of two electrically conductive metal–organic frameworks are dependent on external pressure.

scholarly journals Single Crystals of Electrically Conductive 2D MOFs: Structural and Electrical Transport Properties

2019 ◽  
Author(s):  
Robert W. Day ◽  
D. Kwabena Diako ◽  
Mehdi Rezaee ◽  
Lucas R. Parent ◽  
Grigorii Skorupskii ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Electrical Transport ◽  
Prolonged Exposure ◽  
Metal Organic Frameworks ◽  
Two Dimensions ◽  
Conductivity Measurements ◽  
Electrical Transport Properties ◽  
Electrically Conductive ◽  
Metal Organic

Crystalline, electrically conductive, and intrinsically porous materials are rare. Layered 2D metal-organic frameworks (MOFs) break this trend. They are porous crystals that exhibit high electrical conductivity and are novel platforms for studying fundamentals of electricity and magnetism in two dimensions.1-8 Despite demonstrated applications,9-13 electrical transport in these remains poorly understood because of a lack of single crystal studies. Here, studies of single crystals of two 2D MOFs, Ni3(HITP)2 and Cu3(HHTP)2, uncover critical insights into their structure and transport. Conductivity measurements down to 0.3 K suggest metallicity for mesoscopic single crystals of Ni3(HITP)2, which contrasts with apparent activated conductivity for polycrystalline films. Microscopy studies further reveal that these MOFs are not isostructural as previously reported.14 Notably, single rods exhibit conductivities up to 150 S/cm, which persist even after prolonged exposure to the ambient. These single crystal studies confirm that 2D MOFs hold promise as molecularly tunable platforms for fundamental science and applications where porosity and conductivity are critical.<br>

scholarly journals Electrical Conductivity in a Porous, Cubic Rare-Earth Catecholate

2020 ◽  
Author(s):  
Grigorii Skorupskii ◽  
Mircea Dinca
Keyword(s):  
Charge Transport ◽  
Electronic Materials ◽  
Metal Organic Frameworks ◽  
Electrical Current ◽  
Design Strategies ◽  
Electrically Conductive ◽  
Surface Areas ◽  
New Family ◽  
Structures And Properties ◽  
Metal Organic

Electrically conductive metal-organic frameworks (MOFs) provide a rare example of porous materials that can efficiently transport electrical current, a combination favorable for a variety of technological applications. The vast majority of such MOFs are highly anisotropic in both their structures and properties: only two electrically conductive MOFs reported to date exhibit cubic structures that enable isotropic charge transport. Here, we report a new family of intrinsically porous frameworks made from rare earths and hexahydroxytriphenylene that are cubic, porous, and intrinsically conductive with conductivities reaching 10−5 S/cm and surface areas of up to 780 m2/g. By expanding the list of MOFs with isotropic charge transport, these results will help improve our understanding of design strategies for porous electronic materials.<br>

scholarly journals Electrically Conductive Metal–Organic Frameworks

2020 ◽  
Vol 120 (16) ◽  
pp. 8536-8580 ◽  
Author(s):  
Lilia S. Xie ◽  
Grigorii Skorupskii ◽  
Mircea Dincă
Keyword(s):  
Metal Organic Frameworks ◽  
Electrically Conductive ◽  
Metal Organic

scholarly journals Single Crystals of Electrically Conductive Two-Dimensional Metal–Organic Frameworks: Structural and Electrical Transport Properties

2019 ◽  
Vol 5 (12) ◽  
pp. 1959-1964 ◽  
Author(s):  
Robert W. Day ◽  
D. Kwabena Bediako ◽  
Mehdi Rezaee ◽  
Lucas R. Parent ◽  
Grigorii Skorupskii ◽  
...  
Keyword(s):  
Transport Properties ◽  
Single Crystals ◽  
Electrical Transport ◽  
Metal Organic Frameworks ◽  
Two Dimensional ◽  
Electrical Transport Properties ◽  
Electrically Conductive ◽  
Metal Organic

scholarly journals Isoreticular Linker Substitution in Conductive Metal–Organic Frameworks with Through-Space Transport Pathways

2020 ◽  
Author(s):  
Lilia S. Xie ◽  
Sarah S. Park ◽  
Michał J. Chmielewski ◽  
Hanyu Liu ◽  
Ruby A. Kharod ◽  
...  
Keyword(s):  
Charge Transport ◽  
Metal Organic Frameworks ◽  
Three Dimensional ◽  
Strong Interactions ◽  
Conductivity Data ◽  
Electrically Conductive ◽  
Transport Pathways ◽  
Intermolecular Contacts ◽  
Metal Organic

<p>The extension of reticular chemistry concepts to electrically conductive three-dimensional metal-organic frameworks (MOFs) has been challenging, particularly for cases in which strong interactions between electroactive linkers create the charge transport pathways. Here, we report the successful replacement of tetrathiafulvalene (TTF) with a nickel glyoximate core in a family of isostructural conductive MOFs with Mn<sup>2+</sup>, Zn<sup>2+</sup>, and Cd<sup>2+</sup>. Different coordination environments of the framework metals lead to variations in the linker stacking geometries and optical properties. Single crystal conductivity data are consistent with charge transport along the linker stacking direction, with conductivity values only slightly lower than those reported for the analogous TTF materials. These results serve as a case study demonstrating how reticular chemistry design principles can be extended to conductive frameworks with significant intermolecular contacts.</p>

scholarly journals Computational screening of structural and compositional factors for electrically conductive coordination polymers

2014 ◽  
Vol 16 (28) ◽  
pp. 14463-14472 ◽  
Author(s):  
Davide Tiana ◽  
Christopher H. Hendon ◽  
Aron Walsh ◽  
Thomas P. Vaid
Keyword(s):  
Coordination Polymers ◽  
Metal Organic Frameworks ◽  
Building Blocks ◽  
Electrically Conductive ◽  
Computational Screening ◽  
Metal Organic

We test a range of building blocks and connectivity for the construction of electroactive metal–organic frameworks.

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