Diameter-selective solubilization of single-walled carbon nanotubes by reversible cyclic peptides.
We have utilized reversible cyclic peptides (RCPs)-peptides containing alternating l- and d-amino acids with N- and C-termini derivatized with thiol-containing groups allowing reversible peptide cyclization-to solubilize and noncovalently functionalize carbon single-walled nanotubes (SWNTs) in aqueous solution. Solubilization occurs through wrapping of RCPs around the circumference of a SWNT, followed by the formation of head-to-tail covalent bonds, yielding closed rings on the nanotubes. By controlling the length of the RCPs, we have demonstrated limited diameter-selective solubilization of the SWNTs as revealed by UV/vis/NIR and Raman spectroscopies, as well as atomic force microscopy.
Department of Chemistry, NanoTech Institute, The University of Texas at Dallas, 2601 North Floyd Road, Richardson, Texas 75083-0688, USA.
Alfonso
A
Ortiz-Acevedo
Hui
H
Xie
Vasiliki
V
Zorbas
William M
WM
Sampson
Alan B
AB
Dalton
Ray H
RH
Baughman
Rockford K
RK
Draper
Inga H
IH
Musselman
Gregg R
GR
Dieckmann
D000596:Amino Acids / Q000737:chemistry; D000818:Animals; D003500:Cyclization; D018625:Microscopy, Atomic Force; D015394:Molecular Structure; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010456:Peptides, Cyclic / Q000737:chemistry*; D012995:Solubility; D013056:Spectrophotometry, Ultraviolet; D019265:Spectroscopy, Near-Infrared; D013059:Spectrum Analysis, Raman
D000596:Amino Acids; D037742:Nanotubes, Carbon; D010456:Peptides, Cyclic