Related Experiment Video
Updated: May 23, 2026
13:34
Generation of Scalable, Metallic High-Aspect Ratio Nanocomposites in a Biological Liquid Medium
Published on: July 8, 2015
Keggin polyanion and copper cluster based coordination polymer towards model for complex nanosystem.
Jingjing Gong1, Weisong Zhang, Yang Liu
1Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, People's Republic of China.
Dalton Transactions (Cambridge, England : 2003)
|March 30, 2012
Summary
Researchers synthesized novel metal-organic nanoclusters within coordination polymers. The structure of these nanoclusters was tuned using different charged polyanions, specifically phosphomolybdic acid and silicomolybdic acid.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Nanotechnology
Background:
- Metal-organic nanoclusters are crucial in developing advanced materials.
- Coordination polymers offer versatile frameworks for nanocluster synthesis.
- Controlling nanocluster structure is key to tailoring material properties.
Purpose of the Study:
- To synthesize and characterize metal-organic nanoclusters within coordination polymer matrices.
- To investigate the influence of different charged polyanions on nanocluster structure.
- To explore the tunability of nanocluster architecture for potential applications.
Main Methods:
- Solvothermal synthesis of coordination polymers.
- Incorporation of polyanions, phosphomolybdic acid ([PMo12O40]3-) and silicomolybdic acid ([SiMo12O40]4-), during synthesis.
- Structural characterization using techniques such as X-ray diffraction and electron microscopy.
Main Results:
- Successful synthesis of metal-organic nanoclusters embedded in coordination polymers.
- Demonstrated ability to tune nanocluster size and morphology by varying the charge and type of polyanions.
- Observed distinct structural arrangements of nanoclusters influenced by the [PMo12O40]3- and [SiMo12O40]4- anions.
Conclusions:
- The charge and nature of polyanions significantly impact the structure of metal-organic nanoclusters in coordination polymers.
- This work provides a method for controlled synthesis and structural tuning of nanoclusters.
- The findings open avenues for designing functional materials with tailored nanocluster architectures.
Related Concept Videos
02:51Metal-Ligand Bonds
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...
02:57Coordination Number and Geometry
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
02:42Valence Bond Theory
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...
03:45Formation of Complex Ions
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...
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
02:54Coordination Compounds and Nomenclature
In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...