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A new class of meta-pyridine-urea oligomers for selective identification of mercury(II) ions |
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| Authors: | Yajing Liu Chenjing Chi Renbo Wu Yong Huang Song Liu Mingyue Sun Yuli Sun Zequn Yang HuaLong Chen Zehui Wu |
| Institution: | 1. School of Pharmaceutical Science, Capital Medical University, Beijing 100069, China;2. Brain Institute of Brain Disorders, Capital Medical University, Beijing 100069, China;3. College of Chemistry, Beijing Normal University, Beijing 100875, China |
| Abstract: | 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 results showed that 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. |
| Keywords: | Corresponding authors Aromatic oligoureas The intramolecular charge transfer mechanism Synthesis Ion recognition |
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