Related Experiment Video
Updated: Apr 29, 2026
12:52
IridiumIII Luminescent Probe for Detection of the Malarial Protein Biomarker Histidine Rich Protein-II
Published on: July 7, 2015
11.2K
New ionic dinuclear Ir(III) Schiff base complexes with aggregation-induced phosphorescent emission (AIPE)
Guangfu Li1, Yong Wu, Guogang Shan
1Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Renmin Road 5268, Changchun, 130024, P.R. China. zhudx047@nenu.edu.cn yanlk924@nenu.edu.cn.
Chemical Communications (Cambridge, England)
|May 24, 2014
Summary
Synthesized ionic dinuclear iridium(III) Schiff base complexes exhibit high luminescence quantum yields up to 37% in neat films. These complexes are the first to demonstrate aggregation-induced phosphorescent emission (AIPE).
Area of Science:
- Materials Science
- Inorganic Chemistry
- Photophysics
Background:
- Iridium(III) complexes are widely studied for their photoluminescent properties.
- Schiff base ligands offer versatile coordination chemistry for designing metal complexes.
- Aggregation-induced emission (AIE) and aggregation-induced phosphorescent emission (AIPE) are crucial phenomena for solid-state emitters.
Purpose of the Study:
- To synthesize novel ionic dinuclear Iridium(III) Schiff base complexes.
- To investigate their photophysical properties, focusing on luminescence and AIPE.
- To explore the potential of these complexes in optoelectronic applications.
Main Methods:
- Synthesis of two new ionic dinuclear Iridium(III) Schiff base complexes.
- Characterization of the synthesized complexes using spectroscopic and analytical techniques.
- Measurement of luminescence quantum yields in neat films and investigation of AIPE behavior.
Main Results:
- The straightforward synthesis yielded two new ionic dinuclear Iridium(III) Schiff base complexes.
- These complexes exhibited high luminescence quantum yields, reaching up to 37% in neat films.
- The study presents the first examples of dinuclear ionic Iridium(III) complexes displaying aggregation-induced phosphorescent emission (AIPE).
Conclusions:
- Novel ionic dinuclear Iridium(III) Schiff base complexes can be readily synthesized.
- These complexes possess excellent luminescence properties and exhibit AIPE, making them promising for solid-state lighting and sensing.
- The findings open new avenues for designing advanced phosphorescent materials based on dinuclear Iridium(III) structures.
More Related Videos
Related Concept Videos
01:14Photoluminescence: Applications
1.3K
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...
1.3K
02:42Valence Bond Theory
8.9K
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...
8.9K
01:26Variables Affecting Phosphorescence and Fluorescence
3.9K
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...
3.9K
03:02Colors and Magnetism
12.0K
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...
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...
12.0K
01:19Complexation Equilibria: The Chelate Effect
1.7K
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...
1.7K
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
3.2K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
3.2K