Chemistry Reference
In-Depth Information
OH
H
OH
H
H
O
H
O
+ Cu(
III
)
O
O
HO
HO
H
n
H
NH2
NH2
n
.
+
H
H
+ Cu(
II
)
OH
OH
H
H
H
H
O
O
O
O
+
-
OH
HO
HO
H
H
n
n
.
NH
NH2
.
+
H
H
+
H2O
OH
OH
H
H
H
H
O
O
O
+MA
O
HO
HO
initiation
H
H
n
N
H
n
NH
.
H
H
n MA
Graft Copolymer
COOMe
Scheme 4.5
Initiation mechanism of grafting using potassium diperiodatocuprate (III)
Chitosan-NH
2
+ Ni(IV) Chitosan-NH
2
+ Ni(III)
..
.+
Chitosan-NH
2
+
-
OH Chitosan-NH + H
2
O
.+ .
initiation
+ n AN
Chitosan-NH + AN
Chitosan-NH
Chitosan-NH
AN (AN)
n
-AN
Graft Copolymer
and as above:
Chitosan-NH
2
(another centre) + Ni (III)
Chitosan-NH
2
+ Ni(II)
..
.+
………. etc.
Scheme 4.6
Initiation mechanism of grafting using potassium diperiodatonickelate (IV)
-caprolactone) (Ch-
O
-PCL) with well-
defined structure under very mild conditions. By adopting sodium dodecyl
sulfate-Ch complex (SChC) as an organo-soluble intermediate [
106
], PCL could
Cai et al. [
105
] synthesized Ch-
O
-poly(
ε
