Preparation, structure and redox activity of nickel(II), palladium(II), and copper(II) cofacial binuclear bis(.beta.-keto-enamine) complexes

Bradbury, Julie R.; Hampton, Jacqueline L.; Martone, Daniel P.; Maverick, Andrew W.

doi:10.1021/ic00311a028

Cited by 51 publications

(19 citation statements)

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“…1b) during the reduction process [18,19]. These observations can be rationalized using crystal field theory [20]: in the Cu(II) complex, the electronic configuration of the metal is d 9 , and the structure is stabilized by the Jahn-Teller effect.…”

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confidence: 99%

Controlling the Charge State of a Single Redox Molecular Switch

et al. 2011

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confidence: 99%

Controlling the Charge State of a Single Redox Molecular Switch

et al. 2011

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“…A reversible Ni(II)/Ni(III) transition has been observed at the first oxidation peak ( Figure A). It should be noted that PG‐NaNi has quite early potentials for reduction and oxidation, which indicates that the Ni ions are located quite close in the polymer complex,whereas the separately located ions often have a wider potential gap ,. The electrochemical behavior of the PG‐NaNi MOF was further investigated by the ESR method.…”

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confidence: 99%

A Nickel‐Based Pectin Metal‐Organic Framework as a Hydrogen Oxidation Reaction Catalyst for Proton‐Exchange‐Membrane Fuel Cells

et al. 2019

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Environmentally friendly non‐PGM (platinum group metal) anode catalyst made of nickel pectate, the biological raw material, was developed and tested in proton‐exchange‐membrane fuel cell (PEMFC). 5.2 mA cm‐2 and 1.5 mW cm‐2, the maximum current density and the maximum power density of the developed catalyst, respectively, correspond to sufficiently high values of these characteristics for PEMFC with an anode without a PGM catalyst and a cathode with a platinum one.

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“…To some extent, a qualitative comparison of the I(V) curves with cyclic voltammetry (CV) curves (not shown) can be made. Indeed, the Cu(dbm)2 complex in electrochemistry exhibits a partial irreversibility due to the rearrangement of its coordination sphere from planar to tetrahedral during the reduction process [30,31]. The curve shows that oxidation does not take place until after the corresponding reduction has already occurred, which means that the Cu(II) ion is first reduced into Cu(I) before being oxidized again into Cu(II).…”

Section: Ni(dbm)2 -Comparison Of the Two Complexesmentioning

confidence: 99%

Electromechanical switching behavior of individual molecular complexes of Cu and Ni on NaCl-covered Cu(111) and Ag(111)

et al. 2012

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In a combined Scanning Tunnelling Microscopy (STM) and non-contact Atomic Force Microscopy (nc-AFM) study, we characterize the reversible switching between two stable states of an organometallic complex, namely bis-dibenzoylmethanato-copper (Cu(dbm)2) adsorbed on an insulating thin film. The switching is due to the transfer of an electron between the STM tip and the molecule, accompanied by a conformational change, i.e. a transition from a square-planar to a tetrahedral geometry. Evidence is given by STM topography and spectroscopy and nc-AFM electrostatic force measurements. Similar experiments conducted on bis-dibenzoylmethanato-nickel (Ni(dbm)2) show that this complex does not switch under comparable experimental conditions. We discuss these findings within the framework of crystal field theory stating that the occupation of the d-orbitals determines the favored coordination geometry of a complex. Accordingly, only the copper complex can undergo a conformational change that facilitates stable storing of the additional electron.

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Preparation, structure and redox activity of nickel(II), palladium(II), and copper(II) cofacial binuclear bis(.beta.-keto-enamine) complexes

Cited by 51 publications

References 0 publications

Controlling the Charge State of a Single Redox Molecular Switch

Controlling the Charge State of a Single Redox Molecular Switch

A Nickel‐Based Pectin Metal‐Organic Framework as a Hydrogen Oxidation Reaction Catalyst for Proton‐Exchange‐Membrane Fuel Cells

Electromechanical switching behavior of individual molecular complexes of Cu and Ni on NaCl-covered Cu(111) and Ag(111)

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