COA of Formula: C5H7N3In 2019 ,《A new class of meta-pyridine-urea oligomers for selective identification of mercury(II) ions》 appeared in Tetrahedron Letters. The author of the article were Liu, Yajing; Chi, Chenjing; Wu, Renbo; Huang, Yong; Liu, Song; Sun, Mingyue; Sun, Yuli; Yang, Zequn; Chen, HuaLong; Wu, Zehui. The article conveys some information:
A series of new pyridine-urea oligomers were synthesized and tested for their ability to recognize ions in PBS or Ac buffer solution by fluorescence. The ability of oligourea urea to selectively recognize Hg2+ was gradually enhanced with the increase of chain, which was further proved by DFT calculation The 1:2 stoichiometry was established for the L7-Hg2+ complex on the basis of Job’s plot. The binding constant (KB) and the lowest detection limit for Hg2+ were also determined DFT calculations were used to optimize the structures of L2-7 and its Hg2+ complexes. Highly sensitive and selective probes for the recognition of Hg2+ based on this report are expected to be developed and used for in vivo detection. The results came from multiple reactions, including the reaction of 2,6-Diaminopyridine(cas: 141-86-6COA of Formula: C5H7N3)
2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.COA of Formula: C5H7N3