Synthesis of Nanocrystalline Indium Arsenide and Indium Phosphide from Indium(llI) Halides and Tris(trimethylsilyl)pnicogens; Synthesis, Characterization, and Decomposition Behavior of I3In.P(SiMe3)3.
DUKE UNIV DURHAM NC DEPT OF CHEMISTRY
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Nanocrystalline indium arsenide and indium phosphide were synthesized by heating the products of the independent 11 mole ratio reactions of InX3 X Cl, Br, I with AsSiMe33 and PSiMe33, respectively, and the 21 mole ratio reaction of InCl3 with AsSiMe33. The 11 mole ratio reaction of AsSiMe33 with InCl3 produced a black powder, which after annealing at 400 deg C afforded InAs crystallites of up to 99.96 purity with an average domain size of 9 nm. InAs obtained from the separate 11 mole ratio reactions of InBr3 and InI3 with AsSiMe33 and the 21 mole ratio reaction of InCl3 with AsSiMe33 consisted of crystallites with average domain sizes of 10, 12, and 16 nm, and purities of 99.65, 85.95, and 87.90, respectively. The independent 11 mole ratio reactions of InCl3 and InBr3 with PSiMe33 both produced colored powders, which after annealing afforded nanocrystalline InP particles with respective purities of 91.53 and 93.08 and average domain size of approximately 4 nm for both samples. The 11 mole reaction of InI3 with PSiMe33 afforded the 11 adduct I3In.PSiMe33 I. Compound 1 crystallizes in the monoclinic system, space group P 2 sub 1c, with a 16.0747, b 9.7303, C 16.4546 A, V 2362.115 A3, Dsub calc 2.098 gcu cm for Z 4 the In-P bond length is 2.5373 A. Decomposition of 1 affords nanocrystalline InP of 84.06 purity with an approximate average domain size of 2.5 nm. jg
- Inorganic Chemistry
- Organic Chemistry
- Physical Chemistry