Assemblies of Redox-Active Metallodendrimers Using Hydrogen Bonding for the Electrochemical Recognition of the H2PO4-and Adenosine-triphosphate (ATP2-) Anions

2004 ◽  
Vol 43 (26) ◽  
pp. 8649-8657 ◽  
Author(s):  
Marie-Christine Daniel ◽  
Fatou Ba ◽  
Jaime Ruiz Aranzaes ◽  
Didier Astruc
Keyword(s):  
Hydrogen Bonding ◽  
Adenosine Triphosphate ◽  
Redox Active ◽  
Electrochemical Recognition

scholarly journals Enhanced voltammetric anion sensing at halogen and hydrogen bonding ferrocenyl SAMs

2021 ◽  
Author(s):  
Robert Hein ◽  
Xiaoxiong Li ◽  
Paul D. Beer ◽  
Jason J. Davis
Keyword(s):  
Hydrogen Bonding ◽  
Molecular Films ◽  
Surface Enhancement ◽  
Anion Sensing ◽  
Redox Active

Surface enhancement effects in the sensing of anions at redox-active molecular films are investigated in detail and rationalised based on a consideration of the dielectric binding microenvironment.

Halogen bonding-enhanced electrochemical halide anion sensing by redox-active ferrocene receptors

2015 ◽  
Vol 51 (78) ◽  
pp. 14640-14643 ◽  
Author(s):  
Jason Y. C. Lim ◽  
Matthew J. Cunningham ◽  
Jason J. Davis ◽  
Paul D. Beer
Keyword(s):  
Hydrogen Bonding ◽  
Halogen Bonding ◽  
Anion Receptors ◽  
Halide Anion ◽  
Anion Sensing ◽  
Redox Active

The first redox-active halogen bonding anion receptors display larger electrochemical voltammetric responses to halide binding compared to their hydrogen bonding analogues.

scholarly journals Enhanced Voltammetric Anion Sensing at Halogen and Hydrogen Bonding Ferrocenyl SAMs

2020 ◽  
Author(s):  
Robert Hein ◽  
Xiaoxiong Li ◽  
Paul D. Beer ◽  
Jason J Davis
Keyword(s):  
Signal Transduction ◽  
Hydrogen Bonding ◽  
Real Life ◽  
Halogen Bonding ◽  
Self Assembled Monolayers ◽  
Similar Response ◽  
Binding Motifs ◽  
Anion Sensing ◽  
Redox Active ◽  
Assembled Monolayers

Halogen bonding mediated electrochemical anion sensing has very recently been established as a potent platform for the selective and sensitive detection of anions, although the principles that govern binding and subsequent signal transduction remain poorly understood. Herein we address this challenge by providing a comprehensive study of novel redox-active halogen bonding (XB) and hydrogen bonding (HB) ferrocene-isophthalamide-(iodo)triazole receptors in solution and at self-assembled monolayers (SAMs). Under diffusive conditions the sensory performance of the XB sensor was significantly superior. In molecular films the XB and HB binding motifs both display a notably enhanced, but similar, response to specific anions. Importantly, the enhanced response of these films is rationalised by a consideration of the (interfacial) dielectric microenvironment. These effects, and the resolved relationship between anion binding and signal transduction, underpin an improved fundamental understanding of anion sensing at redox-active interfaces which will benefit not just the development of more potent, real-life relevant sensors, but also new tools to study host-guest interactions at interfaces.

Heteroleptic palladium(II) complexes of dipyrrin-1,9-dione supported by intramolecular hydrogen bonding

2020 ◽  
Vol 24 (01n03) ◽  
pp. 112-120 ◽  
Author(s):  
Clayton J. Curtis ◽  
Elisa Tomat
Keyword(s):  
Hydrogen Bonding ◽  
Chemical Characterization ◽  
Intramolecular Hydrogen Bonding ◽  
Palladium Complexes ◽  
Primary Amines ◽  
Redox Active ◽  
Electron Reduction ◽  
Intramolecular Hydrogen ◽  
Planar Geometries

The dipyrrin-1,9-dione framework, which is characteristic of the propentdyopent pigments deriving from heme metabolism, coordinates metal ions as monoanionic bidentate donors. The resulting analogs of dipyrrinato complexes undergo reversible ligand-based reductions, thus showcasing the ability of the dipyrrindione scaffold to act as an electron reservoir. Herein we report the synthesis and characterization of three heteroleptic palladium complexes of the redox-active dipyrrindione ligand. Primary amines were chosen as additional ligands so as to assemble complexes of planar geometries with complementary interligand hydrogen-bonding. Full chemical characterization confirms the hydrogen bonding interactions between the primary amine ligands and the acceptor carbonyl groups on the dipyrrolic ligand. The resulting heteroleptic compounds display reversible one-electron reduction events that are centered on the dipyrrindione ligand as revealed by voltammetry and spectroelectrochemistry data. Within these planar Pd(II) complexes, the propentdyopent motif therefore combines reversible ligand-based redox chemistry with interligand hydrogen bonding in the primary coordination sphere of the metal center.

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