3D Ni and Co redox-active metal–organic frameworks based on ferrocenyl diphosphinate and 4,4′-bipyridine ligands as efficient electrocatalysts for the hydrogen evolution reaction

Abstract

New 3D Ni and Co redox-active metal–organic frameworks based on ferrocenyl diphosphinate and 4,4′-bipyridine ligands have been explored as efficient electrocatalysts with superior long-term durability in a hydrogen evolution reaction.

Electrochemical Applications of Ferrocene‐Based Coordination Polymers

“…The impact of ferrocenyl linker groups on the redox properties of the resulting CPs was explained by the donation of electrons to metal centers in a rigid three-dimensional framework. [44] Shekurov et al also designed two-dimensional CPs containing Fc phosphinate and Zr/Cd, demonstrating that these polymers showed peaks at different oxidation potentials. Under the same conditions, the Cd-containing CP was oxidized at a more positive potential than the free Fc center.…”

“…The incorporation of redox-active Fc compounds into the modified electrodes can also facilitate recovery, stabilize the redox state, and enhance electron-mediator properties. [2] Khrizanforov et al designed a series of Fc phosphinate CPs with Cd, Zn, Ni, and Co ions [44,45,105,116,117] and selected the Cocontaining CP for SC performance evaluation. [116] This polymer features two-dimensional layers of 1,1'-ferrocenediyl-bis(Hphosphinate) and Co(II) ions, with water molecules acting as hydrogen bond donors located between two strands above the Co 2 + sphere ( Figure 10).…”

“…[28] In another work, novel Co-and Ni-containing redox-active MOFs based on ferrocenyl diphosphinate exhibited high and stable HER catalytic activity (particularly the Ni-MOF) and were concluded to be some of the most active Fc-CPs with long-term stability. [44] Other examples show that Fc-CPs can also be used as electrocatalysts for reactions other than the HER. For example, Fc molecules were assembled in the large channels of NU-1000, and the thus modified MOF was used as a thin-film electrode coating.…”

The core of the matter – arene substitution determines the coordination and catalytic behaviour of tris(1-phosphanyl-1′-ferrocenylene)arene gold(i) complexes

“…Table S3 †) are closer to the ideal 180°t han those found in [1b(Au)]OTf, most likely because the 1,3,5-tris(ferrocenyl)arene-derived ligand structure itself does not impose any steric restrictions anymore. The individual Even though the formation of this CP was not intended and its preparation suffers from poor reproducibility, redox-active ferrocene-derived CPs have recently attained great interest for the insight into molecular architecture and self-assembly [75][76][77] they provide as well as for their potential applications in catalysis, 78,79 non-linear optics, and molecular magnetism. 77 Following the classification of Mochida, {[(1c) 2 (Au) 3 ](OTf ) 3 } n is a one-dimensional main-chain CP derived from a neutral ligand.…”

Crystal structure of a novel one-dimensional zigzag chain-like cobalt(II) coordination polymer constructed from 4,4′-bipyridine and 2-hydroxybenzoate ligands

“…reaction time, pH, solvents, and temperature (Kitagawa et al, 2004;Noro et al, 2009). The structure-property relationships of hybrid polymeric materials with 4,4 0 -bipyridine (4,4 0 -bipy) have been studied intensively (Biradha et al, 2006;Khrizanforova et al, 2020). This is because 4,4 0 -bpy is a rigid molecule that can link the metal centers to form a network with well-defined structures and also support the stability of the structures through aromaticand C-HÁ Á Á interactions (Kaes et al, 2000).…”