dos Santos Franco, Fernanda [UNESP]Peixoto, Murilo Santos [UNESP]dos Santos Felipe, Alexsandro [UNESP]do Carmo, Devaney Ribeiro [UNESP]2022-04-292022-04-292022-01-01Silicon.1876-99181876-990Xhttp://hdl.handle.net/11449/230330A Polyhedral oligomeric silsesquioxane (POSS) doped with cerium (III) was synthesized and reacted with potassium hexacyanoferrate (SCeH). The vibrational, structural, morphological and electrochemical properties of this compound were studied by Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopic, X-ray diffraction, Scanning electron microscopy, Energy dispersive X-ray and voltammetry using a modified graphite paste electrode. The modified paste electrode containing SCeH (SCeGPE) verified one redox pair with formal potential Eθ’ = 0.33 V ± 0.01 (vs Ag/AgCl, KCl, 1.0 mol L−1; v = 100 mV s−1), attributed to the Fe2+/Fe3+ process in the presence of Cerium (III) cyanoferrate. The redox couple presents a high sensitivity and wide response range in the detection of L-dopamine. The limit of detection and amperometric sensibility were established at 4.08 × 10–4 mol L−1 and 8.27 × 10−6 mol L−1 employing the voltammetric and chronoamperometric methods respectively.engElectrochemical sensorL-dopamineMetalsSilsesquioxanesSpectroscopyArtigo10.1007/s12633-022-01659-x2-s2.0-85123960950