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Noncovalent Functionalization of Single-Walled Carbon Nanotubes with Water-Soluble Porphyrins

Chen, Jinyu and Collier, C. Patrick (2005) Noncovalent Functionalization of Single-Walled Carbon Nanotubes with Water-Soluble Porphyrins. Journal of Physical Chemistry B, 109 (16). pp. 7605-7609. ISSN 1520-6106. doi:10.1021/jp050389i.

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We have employed water-soluble porphyrin molecules [meso-(tetrakis-4-sulfonatophenyl) porphine dihydrochloride] to solubilize single-walled carbon nanotubes (SWNTs), resulting in aqueous solutions that are stable for several weeks. The porphyrin-nanotube complexes have been characterized with absorption and fluorescence spectroscopy and with AFM. We find that the porphyrin/SWNT interaction is selective for the free base form, and that this interaction stabilizes the free base against protonation to the diacid. Under mildly acidic conditions nanotube-mediated J-aggregates form, which are unstable in solution and result in precipitation of the nanotubes over the course of a few days. Porphyrin-coated SWNTs can be precisely aligned on hydrophilic poly(dimethylsiloxane) (PDMS) surfaces by combing SWNT solution along a desired direction and then transferred to silicon substrates by stamping. Parallel SWNT patterns have been fabricated in this manner.

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Additional Information:© 2005 American Chemical Society. Received 21 January 2005. Published online 6 April 2005. Published in print 1 April 2005. This work was supported by Arrowhead Research. We thank Yoshie Narui for help with the fluorescence measurements.
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Arrowhead ResearchUNSPECIFIED
Issue or Number:16
Record Number:CaltechAUTHORS:20170606-082255211
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Official Citation:Noncovalent Functionalization of Single-Walled Carbon Nanotubes with Water-Soluble Porphyrins Jinyu Chen and C. Patrick Collier The Journal of Physical Chemistry B 2005 109 (16), 7605-7609 DOI: 10.1021/jp050389i
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77961
Deposited By: Ruth Sustaita
Deposited On:06 Jun 2017 18:18
Last Modified:15 Nov 2021 17:35

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