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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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Supplementary files

Article information


Submitted
08 Oct 2016
Accepted
07 Nov 2016
First published
07 Nov 2016

Chem. Commun., 2016,52, 13893-13896
Article type
Communication

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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