Samarium Polyarsenides Derived from Nanoscale Arsenic.
Christoph Schoo1, Sebastian Bestgen1, Alexander Egeberg1
1Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe, Germany.
Angewandte Chemie (International Ed. in English)
|January 8, 2019
Summary
Elemental arsenic nanoparticles (As0 Nano) offer a new, stable source for synthesizing molecular polyarsenide compounds. This breakthrough avoids the difficulties associated with using yellow arsenic (As4) in f-element chemistry.
Area of Science:
- Inorganic Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Zintl phases and polyarsenide compounds are crucial in both fundamental and applied scientific research.
- The traditional arsenic source, yellow arsenic (As4), is difficult to prepare, store, and handle, limiting its use in synthesizing molecular polyarsenides.
Purpose of the Study:
- To develop a more accessible and reactive arsenic source for the synthesis of molecular polyarsenide compounds.
- To explore the reactivity of elemental arsenic nanoparticles (As0 Nano) in f-element chemistry.
Main Methods:
- Synthesis of elemental arsenic nanoparticles (As0 Nano) with a diameter of 7.2±1.8 nm.
- Utilizing As0 Nano as a reactive arsenic source in reductive chemistry with samarium complexes, specifically [Cp*2 Sm] (Cp*=η5 -C5 Me5).
Main Results:
- Successful synthesis of samarium polyarsenide complexes: [(Cp*2 Sm)2 (μ-η2 :η2 -As2 )] and [(Cp*2 Sm)4 As8].
- Generation of the largest molecular polyarsenide complex reported for f-elements.
- Demonstrated effective circumvention of the need for As4 in preparative chemistry.
Conclusions:
- Elemental arsenic nanoparticles (As0 Nano) serve as a viable and practical alternative to As4 for synthesizing complex molecular polyarsenides.
- This advancement facilitates the study and application of f-element polyarsenide chemistry.
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