Intrinsically conducting metal–organic frameworks

Abstract

Abstract

Is iron unique in promoting electrical conductivity in MOFs?

“…It is also applicable to MOFs, where both metal ions and organic ligands, if redox-active, can lead to mixed-valent states. 40,41 This has been shown already with two MOFs based on 1,2,4,5-tetrahydroxybenzene and its derivatives, where the ligands coexist in the semiquinone and quinone states, which gives rise to high electrical conductivity (10 –3 to 10 –1 S cm –1 ). 42,43 Therefore, redox-active metal ions and organic ligands are desirable when designing electrically conductive MOFs.…”

Probing charge transfer characteristics in a donor–acceptor metal–organic framework by Raman spectroelectrochemistry and pressure-dependence studies

“…8,9 MOFs that incorporate donor-acceptor (D-A) components exhibit unique charge transfer characteristics which have been shown to promote charge transfer pathways that facilitate electrical conductivity. 4,[10][11][12] The area of D-A MOFs has been inspired in major part by the rich literature on organic charge transfer complexes whereby the archetypal 'organic metal' tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) demonstrated a conductivity comparable to metallic copper. 13 Apart from their often intrinsically conductive properties, organic charge transfer complexes have been shown to undergo neutral-ionic phase transitions upon application of external stimuli, such as temperature, pressure and light.…”

Multiple Active Sites: Lithium Storage Mechanism of Cu‐TCNQ as an Anode Material for Lithium‐Ion Batteries

“…The conductivity of the as‐prepared Cu‐TCNQ film on Cu foil was tested by four‐point probe. The average electrical conductivity of Cu‐TCNQ film is 0.305 S cm −1 , which confirms that Cu‐TCNQ with phase I structure exhibits a high electrical conductivity . The direct contact between Cu‐TCNQ and copper substrate can minimize the charge transfer resistance between active material and current collector.…”

“…The average electrical conductivity of Cu-TCNQ film is 0.305 Scm À1 ,w hich confirms that Cu-TCNQ with phase Is tructure exhibits ah igh electricalc onductivity. [30,33] The direct contact between Cu-TCNQ and copper substrate can minimize the charget ransfer resistance between active materiala nd current collector. As well, the uniquea rraylike structure can accelerate the electrolyte infiltration,s ot he Cu-TCNQ/Cu can be used directly as as elf-supportede lectrode.…”