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Citation: . Pb(Ⅱ) Coordination Complexes Based on 5-Methyl-1H-pyrazole-3-carboxylic Acid: Syntheses, Structures and Luminescent Properties[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(4): 687-694. doi: 10.11862/CJIC.2019.084 shu

Pb(Ⅱ) Coordination Complexes Based on 5-Methyl-1H-pyrazole-3-carboxylic Acid: Syntheses, Structures and Luminescent Properties

Received Date: 20 September 2018
Revised Date: 26 January 2019

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In the presence of different N ancillary ligands, treatment of H₂MPCA with corresponding Pb(Ⅱ) salts afforded two complexes, [Pb(HMPCA)₂(H₂O)₂]·H₂O (1) and[Pb(HMPCA)₂(phen)]·H₂O (2) (H₂MPCA=5-methyl-1H-pyrazole-3-carboxylic acid, phen=1, 10-phenanthroline). In dinuclear complex 1, the[Pb(μ₂-HMPCA))]₂ units are extended into a 1D chain structure by a pair of Pb…O secondary bonds. Then, these 1D chains are further assembled to a 2D supramolecular structure through intermolecular hydrogen bonds. While complex 2 displays a mononuclear structure, the Pb…O secondary bonds emerged in the Pb₂O₂ rhomb, which are further packed into a 3D supramolecular framework though π…π interactions and hydrogen bonds. The thermal and luminescent properties of complexes 1 and 2 have also been investigated.
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