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N
N
S
O
Phenothiazine
Phenoxazine
+
NMe
2
Me
2
N
S
N
N
O
Me
2
N
+
Methylene blue
Meldola blue
NO
2
+
S
NMe
2
N
Me
2
N
N
O
+
NH
2
Et
2
N
Nile blue
Methylene green
Me
N
N
S
N
Me
2
N
NH
2
+
Toluidine blue
Phenazine
Me
(CH
2
)
3
NMe
2
+
N
N
S
N
Promazine
Phenazine methosulfate
FIGURE 4.12
The.most.commonly.used.phenothiazine,.phenoxazine,.and.phenazine.mediators.in.carbon.
paste.electrodes.
NC
CN
Tetrathiafulvalene
S
S
O
S
S
N
CH
3
NNH
NC
CN
N
N
CH
3
O
OH
Tetracyanoquinodimethane
OH
HO
+
+
H
3
C
N
N
CH
3
OH
Methylviologen
Riboflavin
FIGURE 4.13
Some.common.mediators.used.as.carbon.paste.modiiers.
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