4-Pyrrolyl-2,2,6,6-tetramethylpiperidine (PyTEMP) was firstly synthesized by Clauson Kaas reaction with 4-amino-2,2,6,6-tetramethylpiperidine as the initial reactant,and 4-pyrrolyl-2,2,6,6-tetramethylpiperidine-l-oxyl (PyTEMPO) was then obtained by an oxidation reaction using 3-chloroperoxybenzoic acid as the oxidizer.The chemical structure of PyTEMPO was confirmed by 1H NMR and FT-IR spectra.The cyclic voltammetry results showed that the equilibrium potential (E0) of PyTEMPO in aqueous solution was 0.75V (vs.SHE),and independent of pH.The kinetic studies indicated that PyTEMPO possessed a highest electron transfer rate constant (k0) in Na2SO4,which was about 3.58×10-4cm/s.In addition,PyTEMPO displayed the highest electrochemical stability in NaCl with the peak current retention rate of 93.0% after 100 CV cycles.
Zhou Wenbo, Xu Juan, Cao Jianyu
. Synthesis and electrochemical property of 4-pyrrolyl-2,2,6,6-tetramethylpiperidine-l-oxyl[J]. New Chemical Materials, 2021
, 49(5)
: 146
-149
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.05.033
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