Facile Synthesis of Hyper-crosslinked Hollow Microporous Organic Capsules for Electrochemical Sensing of Cu (II) ions.

A very simple and facile methodology has been used to prepare dithiocarbamate functionalized hollow microporous organic capsules (HMOCS-DTC) intriguing with excellent stability, high surface area and appropriate microporous architecture. In this strategy, SiO2 particles are used as template to construct PS-DVB-MAA microspheres and then dithiocarbamate groups are grafted on it. HMOCs-DTC/GC has been used as an electrode material for the detection of Cu(II) ions. Herein the cyclic voltammetry (CV) and electron impedance spectroscopy (EIS) has been exploited to study the electrochemical potentiol of designed material. Due to the placement of functional groups (dithiocarbamate) at mesopores interface, has effectively enhanced the mass transfer which facilitates the detection of Cu(II) ions more selectively. High sensitivity of modified electrode has been expressed in terms of current (Ip) enhancement at extremely low concentration of Cu(II) ions. Thus, such a functional and robust porous material (HMOCs-DTC) has presented a sensitive sensing ability, displaying the calibration response over a wide linear range (2.50×10-11 - 3.50×10-10 M) and lowest limit of detection was 1.02× 10-11 M, respectively. Indeed, HMOCs presents a new class of porous polymers that possess extraordinarily high scalability while avoiding complex and expensive synthetic methodologies that prompts its utility in daily life.