Recent Progress of Covalent Organic Frameworks Applied in Electrochemical Sensors

Asan emerging porous crystalline organic material, the covalentorganic frameworks (COFs) are given more and more attention in manyfields, such as gas storage and separation, catalysis, energy storageand conversion, luminescent devices, drug delivery, pollutant adsorptionand removal, analysis and detection due to their special advantagesof high crystallinity, flexible designability, controllable porositiesand topologies, intrinsic chemical and thermal stability. In recentyears, the COFs are applied in analytical chemistry, for instance,chromatography, solid-phase microextraction, luminescent and colorimetricsensing, surface-enhanced Raman scattering and electroanalytical chemistry.The COFs decorated electrodes show high performance for detectingtrace substances with remarkable selectivity and sensitivity, suchas heavy metal ions, glucose, hydrogen peroxide, drugs, antibiotics,explosives, phenolic compounds, pesticides, disease metabolites andso on. This review mainly summarized the application of COF basedelectrochemical sensor according to different target analytes.