A Metallo‐ Silsesquioxane Synthesized from Cu (II) via a Cyanide Fe (III) Bridge: Synthesis and Application as an Electrochemical Sensor

A new metallohybrid silsesquioxane (S) was synthesized herein from copper and ferricyanide via a cyanide bridge to produce a new electroactive hybrid material (SCuH), which was then characterized by spectroscopic and microscopic techniques and cyclic voltammetry. The voltammetric behavior of SCuH employing a graphite paste electrode indicates a well‐defined redox couple with formal potential E θ′ =0.76±0.01 V. The electrode exhibited high sensitivity to nitrite and was successfully tested for nitrite detection. The linearity of the analytical curve was 2.0×10 −4 mol L −1 − 1.0×10 −3 mol L −1 , with a limit of detection of 2.65×10 −5 mol L −1 , and sensitivity amperometric value of 57.63 mA/mol L −1 . These findings suggest that this material displays exceptional potential for application in electrochemical sensors designed for nitrite detection.