Related Experiment Video
Updated: Jul 14, 2026

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
Subtle ligand effects in Cu(I) thiocyanate complexes: from molecular structure to interfacial electron transfer
Alexandra Virginia Bounegru1,2, Sergiu Shova3, Aurel Tăbăcaru1
1Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, "Dunărea de Jos" University of Galati, 111 Domneasca Street, 800201 Galati, Romania. aurel.tabacaru@ugal.ro.
Synthesizing new copper(I) thiocyanate complexes with modified ligands revealed significant impacts on interfacial electron transfer. Ligand design directly influences redox behavior, crucial for developing advanced electrochemical applications.
Area of Science:
- Coordination Chemistry
- Electrochemistry
- Materials Science
Background:
- Copper(I) thiocyanate complexes are explored for their redox and electron transfer properties.
- Ligand modification is a key strategy to tune the behavior of metal complexes.
Purpose of the Study:
- To synthesize and structurally characterize two new copper(I) thiocyanate complexes.
- To investigate the effect of ligand modification on redox behavior and interfacial electron transfer.
- To establish a correlation between ligand design and electrochemical response.
Main Methods:
- Synthesis and single-crystal X-ray diffraction of copper(I) complexes.
- Electrochemical impedance spectroscopy (EIS) on modified glassy carbon electrodes (GCE).
- Cyclic voltammetry (CV) using a ferri/ferrocyanide redox probe.
Main Results:
- Two mononuclear tetrahedral copper(I) thiocyanate complexes, [Cu(NCS)(PPh3)(bq)] (1) and [Cu(NCS)(PPh2py)(bq)] (2), were synthesized.
- Complexes showed improved interfacial electron transfer upon immobilization on GCE, indicated by decreased charge-transfer resistance (Rct).
- Ligand substitution influenced interfacial behavior, with GCE-1 showing diffusion control and GCE-2 exhibiting adsorption control.
Conclusions:
- Subtle ligand modifications significantly impact the electrochemical response and interfacial electron transfer of copper(I) complexes.
- Ligand design is critical for tuning the redox behavior of Cu(I) systems.
- Findings contribute to the rational design of functional coordination compounds for electrochemical applications.
More Related Videos
06:53Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
11:04Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
Published on: September 7, 2019
Related Concept Videos
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Formation of Complex Ions
Complexation Equilibria: The Chelate Effect
Complexation Equilibria: Factors Influencing Stability of Complexes
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...