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Issue 96, 2016
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In situ spectroscopic characterization of a solution-phase X-type ligand exchange at colloidal lead sulphide quantum dot surfaces

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Abstract

We employed quantitative NMR spectroscopy and spectrophotometric absorbance titration to study a quantum dot X-type ligand exchange reaction. We find that the exchange is highly cooperative, where at low extents of exchange the change in free energy of the reaction, ΔGXC, is ∼11 kJ mol−1 while at higher extents of exchange ΔGXC saturates to ∼−4 kJ mol−1. A modified Fowler binding isotherm is developed to describe the reaction.

Graphical abstract: In situ spectroscopic characterization of a solution-phase X-type ligand exchange at colloidal lead sulphide quantum dot surfaces

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Publication details

The article was received on 08 Oct 2016, accepted on 07 Nov 2016 and first published on 07 Nov 2016


Article type: Communication
DOI: 10.1039/C6CC08114B
Chem. Commun., 2016,52, 13893-13896

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    In situ spectroscopic characterization of a solution-phase X-type ligand exchange at colloidal lead sulphide quantum dot surfaces

    D. M. Kroupa, N. C. Anderson, C. V. Castaneda, A. J. Nozik and M. C. Beard, Chem. Commun., 2016, 52, 13893
    DOI: 10.1039/C6CC08114B

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