Electrochemical Studies for Cation Recognition with Diazo-Coupled Calix[4]arenes

Figure 5

DPVs of o-CAC (1 × 10⁻⁴ M) upon the addition of increasing amount of (a) Sr²⁺ and (b) Zn²⁺, and (c) DPVs of o-EAC upon the addition of increasing amount of Cr²⁺. [M²⁺] = 0.5, 1.0, and 1.5 × 10⁻⁴ M. Pulse amplitude: 50 mV, pulse width: 0.05 sec, sample width: 0.0167 sec, and pulse period: 0.2 sec.

(a)

(b)

(c)