Chemistry Reference
In-Depth Information
Fig. 30 Representation of multifunctionalized CNTs bearing chemical appendages covalently
linked through varied chemistry for eventual multireceptor recognition
R
R
Li/NH
3
-R
R
R
R
R
R'H
R
+RH+R'
+
R
R
O
2
R'
R'
Fig. 31 Exchange of functional groups R, R
0
(R
n
Bu; R
0
¼
n
PrNH) based on the deprotonation
of
n
PrNH
2
by
n
Bu, which is generated by reduction of
n
Bu-functionalized SWCNT
¼
5 Characterization of CNTs
Many of the most common characterization techniques employed in classic organic
chemistry, such as
1
H-NMR,
13
C-NMR, mass spectrometry, and FT-IR, give
incomplete information when applied to CNTs, since no details about structure,
morphology, purity, and chemical modification can be extracted.
Furthermore, CNTs cannot be conclusively described as a consequence of the
production methods bringing about different diameters, length distribution, helicity,
and catalyst residues. Also, purification processes and chemical modifications of
CNTs induce additional variations to the material, removing the tips, reducing the
lengths, and introducing defects on the sidewalls.
