Electronic Properties and Structure of Assemblies of CdSe Nanocrystal Quantum Dots and Ru‐Polypyridine Complexes Probed by Steady State and Time‐Resolved Photoluminescence |
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| Authors: | Alexey Y. Koposov Paul Szymanski Thomas Cardolaccia Thomas J. Meyer Victor I. Klimov Milan Sykora |
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| Affiliation: | 1. Chemistry Division, C‐PCS, Los Alamos National Laboratory, MS J567, Los Alamos, New Mexico 87545, USA;2. Department of Chemistry, University of North Carolina, Chapel Hill, NC 27514, USA |
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| Abstract: | Chemical and electronic interactions between CdSe nanocrystal quantum dots (NQDs) and Ru‐polypyridine complexes are studied in solution. It is shown that photoluminescence (PL) can be used to effectively monitor the formation of NQD‐complex assemblies in real time. It is also shown that with the aid of Langmuir isotherm modeling, the PL studies can be used to quantitatively characterize the composition of the assemblies and the strength of electronic interactions between their components. The approach demonstrated here is general and can be applied to other systems that combine semiconductor NQDs and appropriately functionalized organometallic or organic molecules interacting with NQDs via energy transfer, charge transfer, or other mechanisms leading to quenching of NQD emission. |
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| Keywords: | CdSe nanocrystal quantum dot ruthenium polypyridine complex photoluminescence surface chemistry Langmuir isotherm energy transfer charge transfer |
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