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Updated: Jun 7, 2026
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Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
Published on: February 8, 2018
Assembly of titanium embedded polyoxometalates with unprecedented structural features.
Thomas McGlone1, Laia Vilà-Nadal, Haralampos N Miras
1WestCHEM, School of Chemistry, The University of Glasgow, Glasgow, UK G12 8QQ.
Dalton Transactions (Cambridge, England : 2003)
|November 6, 2010
Summary
Two novel titanium-containing polyoxometalates with unique structures were synthesized and characterized. These compounds exhibit high titanium-to-tungsten ratios and show potential for catalytic applications due to reactive titanium sites.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Nanotechnology
Background:
- Polyoxometalates (POMs) are versatile inorganic clusters with tunable properties.
- Incorporating transition metals like titanium into POM frameworks can lead to novel structures and functionalities.
- Understanding the structural and electronic properties of Ti-substituted POMs is crucial for their application.
Purpose of the Study:
- To synthesize and characterize novel titanium-embedded polyoxometalates with unprecedented structural features.
- To investigate the structural, electronic, and potential catalytic properties of these new compounds.
- To explore the impact of titanium incorporation on the polyoxometalate framework and Ti:W ratio.
Main Methods:
- Single crystal X-ray diffraction for structural determination.
- Elemental analysis, IR spectroscopy, and Thermogravimetric Analysis (TGA) for characterization.
- Density Functional Theory (DFT) calculations for electronic structure and optimization.
- Electrochemistry and Electrospray Ionization Mass Spectrometry (ESI-MS) for compound 2.
Main Results:
- Two new titanium-containing polyoxometalates were synthesized: a monotitanium tungstoantimonate (1) and a hexatitanium tungstoarsenate (2).
- Compound 1 features an unprecedented square pyramidal Ti(O)O(4) group with a terminal Ti=O bond.
- Compound 2 exhibits a Krebs-type structure with a high Ti:W ratio and a {Ti(4)(H2O)(10)}(16+) moiety.
- DFT calculations revealed the stabilization of antimony lone pairs in 1 and highlighted the reactive potential of the terminal titanium oxygen in both compounds.
Conclusions:
- The study presents novel titanium-embedded polyoxometalates with unique structural motifs and high Ti:W ratios.
- The characterized compounds demonstrate potential as catalytic materials due to the presence of reactive titanium sites.
- DFT calculations provide insights into the electronic structure and stability, supporting their potential applications.
