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Updated: Jul 15, 2025
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Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
Published on: May 15, 2015
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High pressure decomposition of a sandwich compound
Samuele Fanetti1,2, Sebastiano Romi3, Enrico Berretti1
1Consiglio Nazionale delle Ricerche - Istituto di Chimica dei Composti OrganoMetallici, CNR-ICCOM, Via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy.
The Journal of Chemical Physics
|October 3, 2023
Summary
High pressure transforms nickelocene, an organometallic compound, into nickel-rich nanoparticles within a carbon matrix. This research explores extreme conditions for novel material synthesis.
Area of Science:
- Materials Science
- High-Pressure Physics
- Organometallic Chemistry
Background:
- Organic molecules condense under high pressure, but organometallic behavior is less understood.
- Nickelocene, a representative sandwich compound, is studied to explore high-pressure effects on organometallics.
Purpose of the Study:
- Investigate the chemical transformations of nickelocene at high pressures (up to 41 GPa).
- Characterize the resulting nanocomposite materials and understand their formation mechanisms.
Main Methods:
- Diamond anvil cells for high-pressure generation.
- Optical spectroscopies and microscopy for in-situ observation.
- Synchrotron X-ray absorption spectroscopy and diffraction for structural analysis.
- Transmission electron microscopy for material characterization.
Main Results:
- Nickelocene decomposes above 13 GPa at room temperature, with lower thresholds at elevated temperatures.
- Decomposition yields nanocomposite materials of nickel-rich nanoparticles in an amorphous hydrogenated carbon matrix (a-C:H).
Conclusions:
- High pressure induces significant chemical changes in nickelocene, forming novel nanocomposites.
- Findings suggest potential for new synthesis routes for metal-based nanoparticles via high-pressure organometallic chemistry.
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