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New Gold(I) Complexes as Potential Precursors for Gas-Assisted Methods: Structure, Volatility, Thermal Stability, and
Aleksandra Butrymowicz-Kubiak1, Tadeusz M Muzioł1, Piotr Madajski1
1Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
Molecules (Basel, Switzerland)
|January 11, 2025
Summary
New gold(I) amidinate compounds were synthesized and tested as precursors for nanomaterial fabrication using chemical vapor deposition (CVD) and focused electron/ion beam-induced deposition (FEBID/FIBID). The gold(I) amidinate shows promise for gas-assisted methods.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Nanotechnology
Background:
- Additive fabrication methods like chemical vapor deposition (CVD) and focused electron/ion beam-induced deposition (FEBID/FIBID) are crucial for nanomaterial synthesis.
- Developing user-friendly and effective precursors is key to advancing these deposition techniques.
Purpose of the Study:
- To synthesize and characterize novel gold(I) coordination polymer and complex compounds.
- To evaluate their potential as precursors for CVD and FEBID/FIBID applications.
- To investigate their thermal stability, volatility, and decomposition behavior for precursor design.
Main Methods:
- Synthesis and characterization of gold(I) compounds.
- Single-crystal X-ray diffraction, elemental analysis, and infrared spectroscopy for structural determination.
- Thermal analysis, variable-temperature infrared spectroscopy (VT IR), and sublimation experiments for stability and volatility assessment.
- Electron impact mass spectrometry (EI MS) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX) for decomposition analysis.
Main Results:
- Two new gold(I) compounds, a coordination polymer [Au4(μ-(NH)2CC2F5)4]n and a complex [Au2Cl2(NH2(NH=)CC2F5)2]n, were successfully synthesized and characterized.
- The gold(I) amidinate complex [Au2(μ-(NH)2CC2F5)2]n exhibits sublimation at 413 K under reduced pressure (10-2 mbar).
- Analysis of gas-phase and thin-film decomposition provided insights into precursor behavior for FEBID/FIBID.
Conclusions:
- The synthesized gold(I) amidinate is a user-friendly precursor with suitable volatility for gas-assisted nanomaterial fabrication.
- The study provides valuable data for designing effective gold precursors for additive manufacturing techniques.
- The new gold(I) amidinate shows significant potential for producing metal nanomaterials via gas-assisted methods.
