Table 1.

Selected strategies for the functionalization of electrode surfaces through diazonium cation electrografting and subsequent chemical/electrochemical treatments that further modify the electrode surface polarity or provide chemical derivatives that can be exploited in covalent coupling strategies.

Entry	Surface functionalization strategy[a]	References
a)		i) R=COOH167 ii) R=CH2COOH168 iii) R=CH=CHCOOH169 iv) R=NO2 69, 170, 171, 172, 175 v) R=NH2 176
b)		69, 170, 171, 172, 175
c)		69
d)		156, 157, 158, 159
e)		156
f)		177