Related Experiment Video
Updated: Jan 22, 2026
06:52
Positron Emission Tomography Using 64-Copper as a Tracer for the Study of Copper-Related Disorders
Published on: April 28, 2023
1.9K
Efficiently luminescent copper(i) iodide complexes with crystallization-induced emission enhancement (CIEE)
Mingxue Yang1, Xu-Lin Chen2, Can-Zhong Lu3
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China and University of Chinese Academy of Sciences, Beijing, 100049, China.
Dalton Transactions (Cambridge, England : 2003)
|June 28, 2019
Summary
Simple copper(I) iodide complexes show enhanced luminescence upon crystallization. This effect, known as crystallization-induced emission enhancement (CIEE), is attributed to intermolecular pi-pi interactions that increase structural rigidity.
Area of Science:
- Coordination Chemistry
- Materials Science
- Photophysics
Background:
- Luminescent copper(I) complexes are of interest for optoelectronic applications.
- Controlling luminescence properties through external stimuli is a key challenge.
- Crystallization-induced emission enhancement (CIEE) offers a pathway to amplify light emission.
Purpose of the Study:
- To synthesize and characterize novel luminescent copper(I) iodide complexes.
- To investigate the effect of crystallization on the emission properties of these complexes.
- To elucidate the mechanism behind crystallization-induced emission enhancement (CIEE).
Main Methods:
- Synthesis of copper(I) iodide complexes with diimine and phosphine ligands.
- Photoluminescence spectroscopy to measure emission intensity and wavelength.
- Single-crystal X-ray diffraction to analyze solid-state structures.
- Computational modeling to understand intermolecular interactions.
Main Results:
- Novel luminescent Cu(i) iodide complexes were successfully prepared.
- A significant enhancement in emission intensity was observed upon crystallization.
- Intermolecular π-π stacking interactions between diimine ligands were identified in the crystalline state.
- These interactions were correlated with increased structural rigidity and enhanced luminescence.
Conclusions:
- The study demonstrates a facile method to enhance the luminescence of Cu(i) complexes via crystallization.
- Intermolecular π-π interactions play a crucial role in achieving CIEE by rigidifying the molecular structure.
- These findings provide insights into designing luminescent materials with tunable emission properties.
Related Concept Videos
02:58Crystal Field Theory - Octahedral Complexes
30.7K
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...
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...
30.7K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
48.3K
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,...
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,...
48.3K
02:39Emission Spectra
75.9K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
75.9K
02:42Ionic Crystal Structures
16.9K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
16.9K
01:25Crystal Growth: Principles of Crystallization
4.9K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
4.9K
01:29Positron Emission Tomography
7.0K
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
7.0K