In situ spectroscopic characterization of a solution-phase X-type ligand exchange at colloidal lead sulphide quantum dot surfaces?
Chemical Communications Pub Date: 2016-11-07 DOI: 10.1039/C6CC08114B
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.
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Journal Name：Chemical Communications
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CAS no.: 89640-58-4
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