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

Photoluminescence: Applications01:14

Photoluminescence: Applications

645
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
645
Colors and Magnetism03:02

Colors and Magnetism

12.7K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.7K
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

2.7K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
2.7K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.7K
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...
28.7K
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

760
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
760
Valence Bond Theory02:42

Valence Bond Theory

10.0K
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...
10.0K

You might also read

Related Articles

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

Sort by
Same author

Enantioconvergent Chan-Evans-Lam C(sp<sup>3</sup>)-O Coupling: Cu-Catalyzed Asymmetric Benzyl- and Allylborane Oxidation.

Journal of the American Chemical Society·2026
Same author

Orthorhombic polymorph of 4-(2,2':6',2''-terpyridin-4'-yl)aniline.

IUCrData·2026
Same author

Manipulating Terminal Iron-Hydroxide Nucleophilicity through Redox.

Journal of the American Chemical Society·2026
Same author

Visible photon energy storage by [2+2] cycloaddition of Pd-oxazolones.

Chemical science·2025
Same author

Hydride Transfer Reactivity of an Open-Shell [Fe<sub>3</sub>H]<sup>-</sup> Cluster.

Journal of the American Chemical Society·2025
Same author

Empowering learning in crystallography: launch of the <i>Education and outreach</i> section in <i>Acta Crystallographica</i> Section E.

Acta crystallographica. Section E, Crystallographic communications·2025

Related Experiment Video

Updated: Nov 8, 2025

A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting
08:57

A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting

Published on: March 9, 2017

8.7K

Luminescence from open-shell, first-row transition metal dipyrrin complexes.

Austin B Scharf1, Shao-Liang Zheng2, Theodore A Betley2

  • 1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA. betley@chemistry.harvard.edu and Division of Natural Sciences & Mathematics, Oxford College of Emory University, 801 Emory Street, Oxford, Georgia 30054, USA. austin.scharf@emory.edu.

Dalton Transactions (Cambridge, England : 2003)
|April 20, 2021
PubMed
Summary

This study synthesized transition metal complexes with dipyrrinato ligands, observing significant luminescence in various metal chelates, including zinc complexes with high fluorescence quantum yields. Paramagnetic ions and heavy halogens partially quenched luminescence but enabled room-temperature phosphorescence.

More Related Videos

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
07:11

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis

Published on: August 19, 2021

2.7K
A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
06:06

A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements

Published on: July 19, 2016

9.8K

Related Experiment Videos

Last Updated: Nov 8, 2025

A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting
08:57

A Novel Technique for Generating and Observing Chemiluminescence in a Biological Setting

Published on: March 9, 2017

8.7K
ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
07:11

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis

Published on: August 19, 2021

2.7K
A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements
06:06

A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements

Published on: July 19, 2016

9.8K

Area of Science:

  • Coordination Chemistry
  • Photophysics
  • Materials Science

Background:

  • Dipyrrinato ligands are versatile scaffolds for creating metal complexes with interesting photophysical properties.
  • Investigating luminescence in transition metal complexes is crucial for developing new optical materials and sensors.

Purpose of the Study:

  • To synthesize and characterize first-row transition metal complexes of a specific dipyrrinato ligand and its halogenated analogues.
  • To investigate the luminescence properties (fluorescence and phosphorescence) of these complexes.
  • To understand the effect of ligand halogenation and metal ion paramagnetism on luminescence.

Main Methods:

  • Synthesis of novel dipyrrinato ligands and their corresponding metal complexes (Li, Mn, Cu, Zn).
  • Spectroscopic analysis, including luminescence (fluorescence and phosphorescence) measurements.
  • Determination of fluorescence quantum yields (ΦF).

Main Results:

  • Appreciable luminescence was observed for protonated ligands and Li(i), Mn(ii), Cu(i), Cu(ii), and Zn(ii) chelates.
  • The zinc complex exhibited a high fluorescence quantum yield (ΦF) of 0.67.
  • Luminescence was quenched by heavy halogens and paramagnetic metal ions (Mn(ii), Cu(ii)).
  • Room-temperature phosphorescence was observed in halogenated lithium salts and the non-halogenated Mn(ii) complex.

Conclusions:

  • The synthesized dipyrrinato metal complexes display significant luminescence, with potential applications in optical materials.
  • Ligand structure and metal ion choice critically influence luminescence behavior, offering pathways for tuning photophysical properties.
  • The observation of room-temperature phosphorescence in specific complexes opens avenues for developing novel phosphorescent materials.