Group 13-16 Precursors: What Controls Their Volatility?

Author:

Gillan Edward G.,Bott Simon G.,Barron Andrew R.

Abstract

ABSTRACTThe volatility of a series of group 13–16 cubane compounds, [(R)ME]4 (M = Al, Ga; E = S, Se, Te) has been investigated by thermogravimetric analysis. The effects of the M4E4 core, the ligand (R), and molecular packing on the relative sublimation temperature and the activation energy of sublimation are discussed. For any given ligand type (e.g., [(tBu)ME] 4) volatility is dependent on the compound's molecular mass. The volatility of a homologous series (e.g., [(R)GaS] 4) is proposed to be dependent on the interlocking of the ligands in the solid state. In contrast, the energy of activation for sublimation (Ea) may be related to the molecular packing of the cubane cores in the solid state.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

Reference10 articles.

1. [5] In the present study, sublimation temperature is defined as the temperature at which a weight loss equal to 20 % of the original sample has occurred. This assumes a set heating rate and a similar sample size for all compounds measured.

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3. [7] Isomorphous structures are usually defined as those of isostructural compounds crystallizing in the same unit cell and crystal symmetry, and thus having fractional coordinates that are near identical between structures.

4. Group 2 element and related compounds as chemical vapour deposition precursors for high-temperature superconducting metal oxides

5. Chemical vapor deposition of cubic gallium sulfide thin films: a new metastable phase

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