A general phase-transfer protocol for metal ions and its application in nanocrystal synthesis

Jun Yang; Edward H. Sargent; Shana O. Kelley; Jackie Y. Ying

doi:10.1038/nmat2490

A general phase-transfer protocol for metal ions and its application in nanocrystal synthesis

Jun Yang^*, Edward H. Sargent, Shana O. Kelley, Jackie Y. Ying

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

333 Scopus citations

Abstract

Nanocrystals prepared in organic media can be easily self-assembled into close-packed hexagonal monolayers on solvent evaporation for various applications. However, they usually rely on the use of organometallic precursors that are soluble in organic solvents. Herein we report a general protocol to transfer metal ions from an aqueous solution to an organic medium, which involves mixing the aqueous solution of metal ions with an ethanolic solution of dodecylamine (DDA), and extracting the coordinating compounds formed between the metal ions and DDA into toluene. This approach could be applied towards transferring a wide variety of transition-metal ions with an efficiency of >95%, and enables the synthesis of a variety of metallic and semiconductor nanocrystals to be carried out in an organic medium using relatively inexpensive water-soluble metal salts as starting materials. This protocol could be easily extended to synthesize a variety of heterogeneous semiconductor/noble-metal hybrids and to nanocomposites with multiple functionalities.

Original language	English (US)
Pages (from-to)	683-689
Number of pages	7
Journal	Nature materials
Volume	8
Issue number	8
DOIs	https://doi.org/10.1038/nmat2490
State	Published - 2009

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
General Chemistry
General Materials Science

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title = "A general phase-transfer protocol for metal ions and its application in nanocrystal synthesis",

abstract = "Nanocrystals prepared in organic media can be easily self-assembled into close-packed hexagonal monolayers on solvent evaporation for various applications. However, they usually rely on the use of organometallic precursors that are soluble in organic solvents. Herein we report a general protocol to transfer metal ions from an aqueous solution to an organic medium, which involves mixing the aqueous solution of metal ions with an ethanolic solution of dodecylamine (DDA), and extracting the coordinating compounds formed between the metal ions and DDA into toluene. This approach could be applied towards transferring a wide variety of transition-metal ions with an efficiency of >95%, and enables the synthesis of a variety of metallic and semiconductor nanocrystals to be carried out in an organic medium using relatively inexpensive water-soluble metal salts as starting materials. This protocol could be easily extended to synthesize a variety of heterogeneous semiconductor/noble-metal hybrids and to nanocomposites with multiple functionalities.",

author = "Jun Yang and Sargent, {Edward H.} and Kelley, {Shana O.} and Ying, {Jackie Y.}",

note = "Funding Information: We thank Y. K. Kuan of the Institute of Bioengineering and Nanotechnology, Singapore, for his assistance in characterizing the Pt hollow nanospheres. J.Y. and J.Y.Y. acknowledge the support by the Institute of Bioengineering and Nanotechnology (Biomedical Research Council, Agency for Science, Technology and Research, Singapore). J.Y., E.H.S. and S.O.K. acknowledge the University of Toronto, the US Air Force (MURI grant to S.O.K.) and the NIH (CA1222878-01A2). E.H.S. also acknowledges the Canada Research Chairs, the Canada Foundation for Innovation, and the Natural Sciences and Engineering Council of Canada.",

year = "2009",

doi = "10.1038/nmat2490",

language = "English (US)",

volume = "8",

pages = "683--689",

journal = "Nature materials",

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AU - Yang, Jun

AU - Sargent, Edward H.

AU - Kelley, Shana O.

AU - Ying, Jackie Y.

N1 - Funding Information: We thank Y. K. Kuan of the Institute of Bioengineering and Nanotechnology, Singapore, for his assistance in characterizing the Pt hollow nanospheres. J.Y. and J.Y.Y. acknowledge the support by the Institute of Bioengineering and Nanotechnology (Biomedical Research Council, Agency for Science, Technology and Research, Singapore). J.Y., E.H.S. and S.O.K. acknowledge the University of Toronto, the US Air Force (MURI grant to S.O.K.) and the NIH (CA1222878-01A2). E.H.S. also acknowledges the Canada Research Chairs, the Canada Foundation for Innovation, and the Natural Sciences and Engineering Council of Canada.

PY - 2009

Y1 - 2009

N2 - Nanocrystals prepared in organic media can be easily self-assembled into close-packed hexagonal monolayers on solvent evaporation for various applications. However, they usually rely on the use of organometallic precursors that are soluble in organic solvents. Herein we report a general protocol to transfer metal ions from an aqueous solution to an organic medium, which involves mixing the aqueous solution of metal ions with an ethanolic solution of dodecylamine (DDA), and extracting the coordinating compounds formed between the metal ions and DDA into toluene. This approach could be applied towards transferring a wide variety of transition-metal ions with an efficiency of >95%, and enables the synthesis of a variety of metallic and semiconductor nanocrystals to be carried out in an organic medium using relatively inexpensive water-soluble metal salts as starting materials. This protocol could be easily extended to synthesize a variety of heterogeneous semiconductor/noble-metal hybrids and to nanocomposites with multiple functionalities.

AB - Nanocrystals prepared in organic media can be easily self-assembled into close-packed hexagonal monolayers on solvent evaporation for various applications. However, they usually rely on the use of organometallic precursors that are soluble in organic solvents. Herein we report a general protocol to transfer metal ions from an aqueous solution to an organic medium, which involves mixing the aqueous solution of metal ions with an ethanolic solution of dodecylamine (DDA), and extracting the coordinating compounds formed between the metal ions and DDA into toluene. This approach could be applied towards transferring a wide variety of transition-metal ions with an efficiency of >95%, and enables the synthesis of a variety of metallic and semiconductor nanocrystals to be carried out in an organic medium using relatively inexpensive water-soluble metal salts as starting materials. This protocol could be easily extended to synthesize a variety of heterogeneous semiconductor/noble-metal hybrids and to nanocomposites with multiple functionalities.

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A general phase-transfer protocol for metal ions and its application in nanocrystal synthesis

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