Abstract
Single-walled carbon nanotubes were co-functionalized with pyrenemethanol and 3,5-dihexadecanyloxybenzyl alcohol in different ratios with the purpose of altering the content of pyrene moieties tethered to the nanotube surface. The functionalized nanotube samples were characterized by using established instrumental techniques. The absorption and emission results of the samples suggest that there are significant "intramolecular" excited-state energy transfers from both pyrene monomer and excimer to the linked nanotube, though the energy transfer efficiencies may be different between the monomer and excimer. The excimer formation can be limited by reducing the pyrenemethanol fraction to simplify the excited state processes, but contributions from the luminescence of the well-functionalized carbon nanotubes in the same wavelength region becomes an additional complication. Mechanistic implications of the photophysical results are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 94-100 |
| Number of pages | 7 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 185 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1 2007 |
| Externally published | Yes |
Funding
We thank W. Huang and K. Fu for experimental assistance. Financial support from NSF, NASA, and the Center for Advanced Engineering Fibers and Films (NSF-ERC at Clemson University) is gratefully acknowledged. Research at Oak Ridge National Laboratory was sponsored by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of FreedomCAR and Vehicle Technologies, as part of the HTML User Program, managed by UT-Battelle LLC for DOE.
Keywords
- Energy transfer
- Functionalization
- Single-walled carbon nanotubes