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pH and amine-induced various octamolybdate-based metal-organic complexes: assembly, structures and properties
Xiuli Wang1, Na Han, Hongyan Lin
1Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China. wangxiuli@bhu.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|November 28, 2013
Summary
Three novel octamolybdate-based metal-organic complexes (MOCs) were synthesized, exhibiting diverse 1D, 3D coordination frameworks and network topologies. Structural variations were influenced by amine type and pH, with compound 1 showing electrochemical and photocatalytic potential.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Crystallography
Background:
- Octamolybdate clusters are versatile building blocks for constructing complex inorganic structures.
- Metal-organic complexes (MOCs) offer tunable properties for various applications.
- Hydrothermal synthesis provides a controlled environment for crystal growth and complex formation.
Purpose of the Study:
- To synthesize and characterize novel octamolybdate-based metal-organic complexes (MOCs) using copper and 2-pyrazinecarboxylic acid.
- To investigate the influence of reaction conditions, such as amine type and pH, on the resulting structural diversity.
- To explore the potential applications of the synthesized MOCs, including their electrochemical and photocatalytic properties.
Main Methods:
- Hydrothermal synthesis was employed for the preparation of the MOCs.
- Single crystal X-ray diffraction was used to determine the detailed structures of the complexes.
- Elemental analyses, IR spectroscopy, and thermogravimetric analyses were performed for characterization.
- Electrochemical behavior and photocatalytic activity were investigated for compound 1.
Main Results:
- Three distinct MOCs, [H2en]2[Cu(pzca)2(Mo8O26)]·4H2O (1), [Cu2(pzca)2(Mo8O26)0.5(H2O)4]·H2O (2), and [Cu(I)3Cu(II)4(pzca)7(Mo8O26)(H2O)2]·4H2O (3), were successfully synthesized.
- Compound 1 features a 1D chain extended to a 3D supramolecular structure via hydrogen bonding.
- Compound 2 forms a 3D coordination framework with a dodecagonal channel.
- Compound 3 exhibits a novel 3D metal-organic network with a complex topology.
Conclusions:
- The choice of amine and pH significantly impacts the construction of high-dimensional architectures in octamolybdate-based MOCs.
- The synthesized MOCs display diverse structural motifs, including 1D chains, 3D frameworks, and intricate networks.
- Compound 1 demonstrates potential for electrochemical and photocatalytic applications, warranting further investigation.
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