The binuclear phthalocyanines have attracted much interest as potential catalysts for the four electron reduction of water. 1 However, little work has been carried out into their potential use as environmental sensors for heavy metals. In fact, we could not find any previous work involving the application of non-ionophore metal-free phthalocyanines in cation sensing applications. 2 We believe that the cofacial metal-free binuclear phthalocyanines, which possess an ...
![O(1),O(3)-Bis(Ethoxycarbonylmethyl)-O(2),O(4)-Dimethyl-p-Tert-Butylcalix[4]Arene Structure](https://image.chemsrc.com/caspic/474/149775-71-3.png)