January 2015
Intermediate to advanced
412 pages
12h 10m
English
Content preview from Electrochemical Biosensors
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November 7, 2014 13:15 PSP Book - 9in x 6in 12-Serge-Cosnier-c12
342 Biosensors Based on Electrochemiluminescence
Scheme 12.4:
Ru(bpy)
3
3+
+ C
2
O
4
2−
→ Ru(bpy)
3
2+
+ C
2
O
4
•−
(12.13)
C
2
O
4
•−
→ CO
2
•−
+ CO
2
(12.14)
Ru(bpy)
3
3+
+ CO
2
•−
→ Ru(bpy)
3
2+∗
+ CO
2
(12.15)
Ru(bpy)
3
2+
+ CO
2
•−
→ Ru(bpy)
3
+
+ CO
2
(12.16)
Ru(bpy)
3
3+
+ Ru(bpy)
3
+
→ Ru(bpy)
3
2+∗
+ Ru(bpy)
3
2+
(12.17)
Ru(bpy)
3
2+∗
→ Ru(bpy)
3
2+
+ hγ (12.18)
• Tri-n-propylamine (TPrA) system: TPrA is another impor-
tant popular “oxidative reductive” coreactant for ECL sys-
tems, especially Ru(bpy)
3
2+
. The electrochemical oxidation
of TPrA can produce the short-lived TPrA radical cation
(TPrA
•+
), which loses a proton from an α-carbon to form
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