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Title: An efficient method for the surface functionalization of luminescent quantum dots with lipoic acid-based ligands
Authors: La Rosa, Marcello
Avellini, Tommaso
Lincheneau, Christophe
Silvi, Serena
Wright, Iain A.
Constable, Edwin C.
Credi, Alberto
Keywords: CdSe
Nanoparticle
Phase transfer
Semiconductor nanocrystal
Solubility
Issue Date: 2017
Publisher: © Wiley
Citation: LA ROSA, M. ... et al, 2017. An efficient method for the surface functionalization of luminescent quantum dots with lipoic acid-based ligands. European Journal of Inorganic Chemistry, doi:10.1002/ejic.201700781.
Abstract: We describe an operationally advantageous general methodology to efficiently activate lipoic acid-based compounds - a family of popular surface ligands for semiconductor nanocrystals - by the use of a borohydride exchange resin, and the use of the activated species to replace the native surface ligands of quantum dots. The procedure enables the phase transfer of the nanocrystals between polar and aqueous media and, if unsubstituted lipoic acid is used, a facile adjustment of their solubility in a wide range of solvents with varying polarity (from hexane to water). We show that the protocol is applicable to different types of nanocrystals and a variety of lipoic acid-based ligands, and that the resulting quantum dots maintain their optical properties - in particular, an intense luminescence - and long term colloidal stability.
Description: This paper is closed access until 18th September 2018.
Sponsor: Financial support from the EU (FP7-NMP project Hysens, No. 263091), the Italian Ministry for Education, University and Research (PRIN 2010CX2TLM InfoChem), and the University of Bologna is gratefully acknowledged.
Version: Accepted for publication
DOI: 10.1002/ejic.201700781
URI: https://dspace.lboro.ac.uk/2134/26613
Publisher Link: https://doi.org/10.1002/ejic.201700781
ISSN: 1434-1948
Appears in Collections:Closed Access (Chemistry)

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