Related Experiment Video
Updated: Jul 19, 2025
07:24
Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
Published on: April 14, 2020
17.3K
Crystal Sponge Behavior in a Two-Dimensional Rare-Earth Hybrid Coordinate Polymer
Ze-Jiang Xu1, Na Wang1, Wang Luo1
1Chaotic Matter Science Research Center, Department of Materials, Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China.
Inorganic Chemistry
|August 15, 2023
Summary
Researchers developed a novel 2D rare-earth coordination polymer exhibiting reversible crystal transformations and significant changes in quantum efficiency and dielectric properties, showcasing crystal sponge behavior.
Area of Science:
- Materials Science
- Chemistry
- Crystallography
Background:
- Stimuli-responsive multifunctional materials (SRMMs) offer dynamic responses to external stimuli.
- Achieving simultaneous solvent-induced single-crystal to single-crystal (SCSC) transformation and post-desolvation structural phase transition remains a challenge.
Purpose of the Study:
- To design and synthesize a novel 2D rare-earth organic-inorganic hybrid coordination polymer.
- To investigate its stimuli-responsive properties, including SCSC transformation, quantum efficiency changes, and dielectric switching.
Main Methods:
- Synthesis of a 2D rare-earth organic-inorganic hybrid coordination polymer.
- Crystallographic analysis to confirm SCSC transformation.
- Photoluminescence spectroscopy to measure quantum efficiency.
- Dielectric measurements to assess phase transitions.
Main Results:
- A reversible SCSC transformation was observed in the rare-earth polymer upon solvent stimuli.
- The transformation led to significant changes in quantum efficiency (33.68% to 20.07%).
- An isomorphic structural phase transition with dielectric switching and reversible layer distance changes (crystal sponge behavior) was demonstrated.
Conclusions:
- The developed 2D rare-earth coordination polymer exhibits multifunctional responsive behavior.
- This study highlights the potential of such materials for designing novel SRMMs.
- Opens new avenues for exploring advanced responsive materials with tunable properties.
Related Concept Videos
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
42.9K
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,...
42.9K
02:58Crystal Field Theory - Octahedral Complexes
26.8K
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...
26.8K
01:21Polymer Classification: Crystallinity
2.9K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.9K
03:35Hybridization of Atomic Orbitals II
32.4K
sp3d and sp3d 2 Hybridization
32.4K
03:24Hybridization of Atomic Orbitals I
47.3K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
47.3K
02:42Valence Bond Theory
8.7K
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...
8.7K