Related Experiment Video
Updated: Jul 14, 2025
08:54
Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals
Published on: May 25, 2016
8.5K
A Cationic Octanuclear Zirconium Peroxide Ring with Unusual Thermal Stability
Zhe Han1, Chunhui Wang1, Yuan Gao1
1School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
Inorganic Chemistry
|October 5, 2023
Summary
A novel octanuclear zirconium peroxide cluster, Zr8, was synthesized. This ringlike cluster exhibits unusual positive charges and remarkable thermal stability, expanding knowledge of zirconium chemistry and metal peroxide properties.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Nuclear Chemistry
Background:
- Zirconium peroxide clusters are crucial for nuclear fuel cycle understanding.
- Group IV metal oxo clusters are underexplored.
- Zirconium chemistry benefits from studying its peroxide reactions.
Purpose of the Study:
- Synthesize and characterize a novel octanuclear zirconium peroxide cluster.
- Investigate the structural and thermal properties of the new cluster.
- Expand the family of known zirconium peroxide clusters.
Main Methods:
- Synthesis of the octanuclear zirconium peroxide cluster (Zr8).
- Crystallographic analysis for structural determination.
- In situ variable-temperature Raman spectroscopy for thermal stability.
- Small-angle X-ray scattering for self-assembly studies.
Main Results:
- A ringlike octanuclear zirconium peroxide cluster (Zr8) was successfully synthesized.
- Zr8 exhibits unusual positive charges, differing from typical neutral metal oxo clusters.
- The cluster demonstrates unexpected thermal stability due to strong ZrIV-peroxide interactions.
- Evidence of Zr8 self-assembly in solution prior to crystallization was observed.
Conclusions:
- Zr8 represents a significant addition to the limited family of zirconium peroxide clusters.
- The unique properties of Zr8 enrich the understanding of metal peroxide chemistry.
- This research contributes to advancing the study of Group IV metal oxo clusters.
More Related Videos
Related Concept Videos
01:17Thermal Electrocyclic Reactions: Stereochemistry
2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
01:10Radical Reactivity: Steric Effects
1.9K
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
Along with electronic...
1.9K
02:24Acid-Catalyzed Ring-Opening of Epoxides
7.4K
Epoxides that are three-membered ring systems are more reactive than other cyclic and acyclic ethers. The high reactivity of epoxides originates from the strain present in the ring. This ring strain acts as a driving force for epoxides to undergo ring-opening reactions either with halogen acids or weak nucleophiles in the presence of mild acid. The acid catalyst converts the epoxide oxygen, a poor leaving group, into an oxonium ion, a better leaving group, making the reaction feasible. The...
7.4K
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.4K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.4K
01:18Aromatic Hydrocarbon Cations: Structural Overview
2.8K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
2.8K
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
3.3K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.3K