Related Experiment Video
Updated: Apr 18, 2026
![The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F54498.jpg&w=3840&q=50)
12:43
The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique
Published on: November 28, 2016
9.2K
Asymmetrically fused polyoxometalate-silver alkynide composite cluster
Mariko Kurasawa1, Fumio Arisaka, Tomoji Ozeki
1Department of Chemistry and Materials Science, Tokyo Institute of Technology , 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
Inorganic Chemistry
|January 15, 2015
Summary
Researchers synthesized a novel asymmetric composite cluster by fusing polyoxometalate and silver alkynide. This new material, [Ag25{C≡CC(CH3)3}16(CH3CN)4(P2W15Nb3O62)], shows structural integrity in solution.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Nanotechnology
Background:
- Polyoxometalates (POMs) are versatile inorganic clusters with tunable properties.
- Silver alkynide complexes offer unique reactivity and structural motifs.
- Combining POMs and metal alkynides can lead to novel composite materials with emergent properties.
Purpose of the Study:
- To synthesize a novel asymmetric composite cluster integrating polyoxometalate and silver alkynide functionalities.
- To elucidate the structure and stability of the synthesized composite cluster.
- To investigate the formation mechanism of the composite cluster.
Main Methods:
- One-pot synthesis utilizing a Nb-substituted Dawson-type polyoxometalate and silver sources.
- Single-crystal X-ray diffraction for precise structural determination.
- (31)P Nuclear Magnetic Resonance (NMR) spectroscopy and analytical ultracentrifugation for solution-state characterization and mechanistic studies.
Main Results:
- Successful facile synthesis of an asymmetric composite cluster, [Ag25{C≡CC(CH3)3}16(CH3CN)4(P2W15Nb3O62)] (1).
- X-ray diffraction confirmed selective attachment of silver atoms to the Nb-substituted hemisphere of the Dawson anion.
- Solution structural integrity was verified, and a stepwise formation mechanism was revealed by analytical ultracentrifugation.
Conclusions:
- Demonstrated the feasibility of constructing asymmetric composite clusters by fusing POM and silver alkynide moieties.
- Established the structural characterization and solution stability of the novel composite cluster.
- Provided insights into the self-assembly pathway of such hybrid materials.
Related Concept Videos
02:37Metallic Solids
21.6K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
21.6K
03:45Formation of Complex Ions
27.1K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
27.1K
02:38Electrophilic Addition to Alkynes: Halogenation
10.7K
Introduction
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
10.7K
02:51Metal-Ligand Bonds
25.9K
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...
25.9K
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
01:19Complexation Equilibria: The Chelate Effect
1.6K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.6K