Solvent-dependent fluorescence property of multi-walled carbon nanotubes noncovalently functionalized by pyrene-derivatized polymer.
Multi-walled carbon nanotubes (MWCNTs) were supramolecularly functionalized by pyrene-derivatized hydrolyzed poly(styrene-co-maleic anhydride) (pyrene-HSMA) in aqueous solution. The MWCNTs/pyrene-HSMA conjugates were found to exhibit a solvent-dependent fluorescence property by photoluminescence measurements. The fluorescence intensity of the MWCNTs/pyrene-HSMA conjugate was used as a probe to estimate the interaction between polymer and MWCNTs in solvents. The polymer conformation around the MWCNTs was demonstrated by atomic force microscopy. We suggested that pyrene-HSMA functionalized MWCNTs in a non-wrapping mode, and that the conformation change of the polymer around the MWCNTs resulted in the solvent-dependent fluorescence property. The dispersion state of the MWCNTs/pyrene-HSMA conjugate in various solvents was also investigated by transmission electron microscopy. The fluorescence responses of the MWCNTs/pyrene-HSMA conjugate to pH value and temperature were studied as well.
Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou 310027, People's Republic of China.
Yan
Y
Gao
Minmin
M
Shi
Renjia
R
Zhou
Chaohua
C
Xue
Mang
M
Wang
Hongzheng
H
Chen
D000431:Ethanol / Q000737:chemistry; D005453:Fluorescence; D008298:Maleates / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D046529:Microscopy, Electron, Transmission; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D011137:Polystyrenes / Q000737:chemistry*; D011721:Pyrenes / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry
D008298:Maleates; D037742:Nanotubes, Carbon; D011137:Polystyrenes; D011721:Pyrenes; D012997:Solvents; C521900:poly(styrene-co-maleic anhydride); D014867:Water; D000431:Ethanol; C030984:pyrene