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The homometallic polyoxotungstate archetype {P4W24}.
Xiaofeng Yi1, Natalya V Izarova, Paul Kögerler
1Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute - PGI 6, Forschungszentrum Jülich, D-52425 Jülich, Germany.
Chemical Communications (Cambridge, England)
|January 9, 2018
Summary
Researchers created stable, crystallizable homometallic phosphotungstates using organophosphonate and organoarsonate groups. These compounds, like the P4W24 derivative, can be used in further reactions, including forming coordination polymers.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Homometallic phosphotungstates, particularly the {PW} archetype, are challenging to crystallize and characterize due to their elusive nature.
- Functionalization strategies are crucial for accessing and studying novel polyoxometalate structures.
Purpose of the Study:
- To achieve crystallization and structural characterization of previously elusive homometallic phosphotungstates.
- To investigate the stability and reactivity of functionalized phosphotungstates in aqueous solutions.
- To demonstrate the utility of these compounds in constructing coordination polymers.
Main Methods:
- Synthesis of homometallic phosphotungstates functionalized with terminal organophosphonate and organoarsonate groups.
- Crystallization and X-ray diffraction for structural characterization.
- 31P Nuclear Magnetic Resonance (NMR) spectroscopy to assess stability in aqueous media.
- Coordination chemistry techniques to form metal-organic coordination polymers.
Main Results:
- Successful crystallization and structural elucidation of homometallic phosphotungstates of the {PW} archetype.
- Demonstration of moderate aqueous stability for the [(PhPO)2P4W24O92]16- derivative via 31P NMR.
- Exemplification of consecutive reactivity, leading to the formation of a cobalt(II)-based coordination polymer with the {P4W24} core.
Conclusions:
- Terminal organophosphonate and organoarsonate functionalization is an effective strategy for the crystallization and characterization of elusive homometallic phosphotungstates.
- The studied phosphotungstate derivative exhibits sufficient stability in aqueous solution for further chemical transformations.
- These functionalized phosphotungstates serve as versatile building blocks for constructing advanced coordination materials.
