American Chemical Society
jp8b01228_si_001.pdf (1.61 MB)

Complex Transfer Reaction from ZnO to ZnS Quantum Dots Driven by Surface Anions

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journal contribution
posted on 2018-04-12, 00:00 authored by Shilaj Roy, Mihir Manna, Arun Chattopadhyay
This work demonstrates preferential transfer of 8-hydroxyquinoline-5-sulfonic acid (HQS) from surface of ZnO quantum dots to ZnS quantum dots in the form of Zn­(QS)2 complex. This is an instance of inter quantum dot complex or Z-type ligand transfer that depends on solvent systemmore precisely, solubility of the migrating complex. The migration can be explained using Langmuir model by considering two parallel adsorption equilibria on ZnO and ZnS surfaces. We also propose that higher stability of the zinc quinolato complex on ZnS surface in comparison to that of ZnO is the driving force of the reaction.