Water Soluble Cationic Porphyrin Sensor for Detection of Hg<sup>2+</sup>, Pb<sup>2+</sup>, Cd<sup>2+</sup>, and Cu<sup>2+</sup>

<div>Structure of the cationic porphyrin (<b>1</b>).</div>

Journal of Sensors

Figure 1: Water Soluble Cationic Porphyrin Sensor for Detection of Hg<sup>2+</sup>, Pb<sup>2+</sup>, Cd<sup>2+</sup>, and Cu<sup>2+</sup> 