Single-Walled Carbon Nanotubes Tethered with Porphyrins: Synthesis and Photophysical Properties


  • We thank Prof. A. M. Rao for supplying the SWNT sample, and S. Fernando, Y. Lin, and B. Zhou for experimental assistance. Financial support from the NSF, NASA, and the Center for Advanced Engineering Fibers and Films (NSF-ERC at Clemson University) is gratefully acknowledged. We also thank the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Transportation Technologies, as part of the HTML User Program, managed by UT-Battalle LLC for DOE (DE-AC05-00OR22725).


Single-walled carbon nanotubes have been functionalized with derivatized porphyrins (see Figure). The photoexcited state properties of the nanotube-tethered porphyrin moieties are investigated via steady-state and time-resolved fluorescence methods. Intramolecular energy-transfer quenching of porphyrin fluorescence by the tethered nanotube occurs in the sample with a longer tether, but no fluorescence quenching is observed in the sample with a shorter tether.