A free-metal single covalent organic framework electrochemical detective platform for sensitive sensing of carbendazim.

Carbendazim abuse in agriculture can lead to the residue in water and food, which may bring about adverse effects to human's health. In this study, we report the solvothermal synthesis of free-metal single TT-COF with one-step strategy and the TT-COF-based electrochemical sensor is fabricated for the further sensing of carbendazim. The TT-COF possesses high surface area, excellent conductivity and outstanding electrocatalytic activity.

Post-modification of covalent organic framework functionalized aminated carbon nanotubes with active site (Fe) for the sensitive detection of luteolin.

In this research, the TT-COF(Fe)@NH-CNTs was innovatively prepared through a post-modification synthetic process functionalized TT-COF@NH-CNTs with active site (Fe), where TT-COF@NH-CNTs was prepared via a one-pot strategy using 5,10,15,20-tetrakis (para-aminophenyl) porphyrin (TTAP), 2,3,6,7-tetra (4-formylphenyl) tetrathiafulvalene (TTF) and aminated carbon nanotubes (NH-CNTs) as raw materials. The complex TT-COF(Fe)@NH-CNTs material possessed porous structures, outstanding conductivity and rich catalytic sites. Thus, it can be adopted to construct electrochemical sensor with glassy carbon electrode (GCE).

A single-site porphyrin (Cu)-based COF electrocatalyst for the electrochemical detection of gallic acid sensitively.

Sensitive and convenient determination of gallic acid (GA) is vital for food safety. Here, a novel porphyrin (Cu)-based covalent organic framework named as COF(Cu) was successfully synthesized by condensing pre-metalated 5,10,15,20-tetrakis (para-aminophenyl) porphyrin copper (II) and 2,3,6,7-tetra (4-formylphenyl) tetrathiafulvalene ligands. By combining the advantages of porphyrin with tetrathiafulvalene, it may be possible to create a COF with an intrinsically effective charge-transfer channel.