Journal of Chemistry / 2013 / Article / Tab 3

Research Article

Reactions of o,o′-Dihydroxy Azo Dyes with the Third Group M(III) Ions: A Spectroscopic and Electrochemical Study

Table 3

Voltammetric characteristics of M(III)-azo dye system.

Azo dyeMetalpH for investigation ( )New peaks , V  
(at )
Linear range, M

ERBSc8.0–8.6One peak P10.89
Ga3.3–4.6
4.0–4.6
Two peaks P1, P20.50–0.61
0.96–1.01
(P1)
7.7–8.2One peak P10.83
In9.5One peak P10.84 [11]
REE10.0One peak P10.96 [9]

EBTAl5.0One peak P10.51It was not studied
Sc5.5–6.5One peak P10.64
Ga4.1–4.5
4.4-4.5
Two peaks P1, P20.40–0.44
0.95
(P1)
8.3–8.7One peak P10.66It was not studied
In8.0–8.2One peak P10.70
REE10.5One peak P10.80 [10]

KLCAl5.1One peak P10.52
Sc4.8
8.2–9.0
One peak P10.59
0.73–0.77

Ga3.9–5.2
4.4–5.5
Two peaks P1, P20.42–0.46
0.98-0.99
(P1)
(P2)
In5.0–6.0No new peaks observed, increasing of the current of In3+→In0 peak
REE9.0–9.5One peak P10.89

CalcSc3.5One peak P10.53
Ga3.7–4.5
4.3–5.3
Two peaks P1, P20.45–0.49
0.98–1.04
(P1)
In4.0–5.5No new peaks observed, increasing of the current of In3+→In0 peak
REENo new peaks observed

EBSEAl6.6–7.3One peak P10.67–0.69
Sc6.4–7.0
8.2–9.2
One peak P10.76-0.77
0.77–0.79

Ga5.4–7.0Two peaks P1, P2
(the peak is not clear)
0.52–0.59
In4.9–5.6No new peaks observed, increasing of the current of In3+→In0 peak0.61
6.7–8.9One new peak
(not observed in the absence of EBSE)
0.63–0.67
REE7.5–8.5One peak P10.80

Range of pH at which current of complex peak is maximal or constant.

Article of the Year Award: Outstanding research contributions of 2020, as selected by our Chief Editors. Read the winning articles.