Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

523
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
523
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

27.4K
Crystal Field Theory
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...
27.4K
Valence Bond Theory02:42

Valence Bond Theory

9.1K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
9.1K
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

645
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
645
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

21.4K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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...
21.4K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

44.1K
Tetrahedral 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,...
44.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Self-Organized Nanoplasmonic Artificial Leaf for Hot-Carrier Bioelectronic Interfaces.

Nature photonics·2026
Same author

2D Semiconductor Nanosheets Supported on Colloidal Quantum Cubes.

ACS nano·2026
Same author

Atomic Alignment in PbS Nanocrystal Superlattices with Compact Inorganic Ligands via Reversible Oriented Attachment of Nanocrystals.

Journal of the American Chemical Society·2026
Same author

Tracking Optical Phonon Dynamics in InP Nanocrystals via Transient Absorption and Femtosecond Stimulated Raman Spectroscopy.

ACS nano·2026
Same author

Emissive Colloidal GaAs Quantum Dots.

Journal of the American Chemical Society·2026
Same author

Efficient Second-Harmonic Generation from Molecular Monolayers.

ACS nano·2026

Related Experiment Video

Updated: Sep 6, 2025

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
14:44

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

Published on: December 16, 2013

9.7K

Toward Improved Charge Separation through Conformational Control in Copper Coordination Complexes.

Paul J Griffin1, Bronte J Charette1, John H Burke1

  • 1Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States.

Journal of the American Chemical Society
|June 28, 2022
PubMed
Summary

Researchers developed a bioinspired method for sustained photodriven charge separation (CS) in solar energy. This approach uses copper complexes with unique ligands to significantly enhance CS state lifetimes and reduce degradation.

More Related Videos

Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
11:04

Ion 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

9.3K
Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores
11:38

Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores

Published on: April 5, 2022

2.6K

Related Experiment Videos

Last Updated: Sep 6, 2025

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
14:44

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR

Published on: December 16, 2013

9.7K
Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
11:04

Ion 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

9.3K
Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores
11:38

Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores

Published on: April 5, 2022

2.6K

Area of Science:

  • Inorganic Chemistry
  • Photochemistry
  • Renewable Energy

Background:

  • Developing efficient solar energy conversion requires sustained photodriven charge separation (CS).
  • Existing methods face challenges in maintaining long-lived charge-separated states.

Purpose of the Study:

  • To present a bioinspired strategy for enhancing charge separation (CS) in solar energy applications.
  • To investigate copper complexes with ligands designed for photoinduced conformational changes and tunable coordination environments.

Main Methods:

  • Synthesis and characterization of copper(I) and copper(II) complexes with dipicolylaminoacetophenone (dpaa) ligands.
  • Utilized spectroscopy (NMR, IR, EPR, optical), X-ray diffraction, electrochemistry, and time-resolved photophysical techniques.
  • Investigated the role of twisted intramolecular charge transfer (TICT) states and ortho-methoxy substituents.

Main Results:

  • Copper complexes with TICT-active ligands demonstrated a ~1000-fold enhancement in charge separation (CS) state lifetimes compared to controls.
  • The ortho-methoxy substituent on the ligand stabilized the TICT* state and favored Cu(II) coordination.
  • Copper(I) presence reduced photoinduced degradation from 14% to <2% without significant electron transfer quenching.

Conclusions:

  • Bioinspired ligand design can effectively translate photoinduced molecular dynamics into sustained charge separation.
  • The developed copper complexes show promise for improving the stability and efficiency of solar energy conversion systems.
  • Further research into factors influencing CS is crucial for advancing solar energy technologies.