Related Experiment Video
Updated: Apr 15, 2026
11:10
Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
12.6K
Controlled reactivity tuning of metal-functionalized vanadium oxide clusters
Katharina Kastner1, Johannes Forster, Hiromichi Ida
1Institute of Inorganic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm (Germany) http://www.strebgroup.net.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 9, 2015
Summary
Researchers developed a new method to functionalize molecular vanadium oxides, enabling tailored magnetic, redox, and catalytic properties for advanced materials. This breakthrough opens doors for novel applications in energy conversion and catalysis.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Nanotechnology
Background:
- Molecular metal oxides (MxOy)n- offer tunable properties for functional materials.
- Existing functionalization methods apply to tungstates and molybdates, but not molecular vanadium oxides.
- Controlled polyoxovanadate design is crucial for applications in energy conversion, catalysis, and magnetism.
Purpose of the Study:
- To develop a novel approach for the controlled functionalization of molecular vanadium oxides.
- To enable the tuning of reactivity in vanadium oxide clusters through selective metal incorporation.
- To create tailored polyoxovanadates for advanced material applications.
Main Methods:
- Utilized organic, hydrogen-bonding cations (e.g., dimethylammonium) as molecular placeholders.
- Employed placeholders to selectively block metal binding sites within vanadate cluster shells.
- Achieved mono- and difunctionalized clusters via stepwise replacement of placeholder cations with metal cations.
Main Results:
- Successfully demonstrated a method for selective metal functionalization of vanadium oxide clusters.
- Produced mono- and difunctionalized polyoxovanadates with controlled structures.
- Initial studies confirmed the tunability of magnetic, redox, and catalytic properties of the functionalized clusters.
Conclusions:
- The developed method provides a route to precisely control the functionalization of molecular vanadium oxides.
- This control allows for the targeted design of polyoxovanadates with specific properties.
- The findings pave the way for developing advanced materials for catalysis, energy, and magnetism.
Related Concept Videos
02:42Valence Bond Theory
11.9K
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...
11.9K
01:23Properties of Organometallic Compounds
2.2K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
2.2K
01:27Biasing of Metal-Semiconductor Junctions
857
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
857
02:51Metal-Ligand Bonds
25.8K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
25.8K
02:58Properties of Transition Metals
31.2K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
31.2K
02:58Crystal Field Theory - Octahedral Complexes
32.2K
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...
32.2K