Two Pb(Ⅱ)/Ag(I) Coordination Polymers Constructed by the Same Mixed Ligand and Their Fluorescence Properties

Abstract

Abstract: The 2-(1H-imidazol-1-yl) acetic acid (Hima), 4,4'-bpy, reacts with metal ions Pb(NO₃)₂ and AgNO₃ respectively. Finally, [Pb₂(4,4'-bipy)(ima)(NO₃)₃]_n (1, 3D framework) and [Ag₄(4, 4'-bipy)₃(ima)₂(NO₃)₂(H₂O)₂]_n (2, 3D framework) coordination polymers were obtained. Based on the structural characterizations of the corresponding compounds, their chemical and physical properties, such as photoluminescence was investigated. The solid-state photoluminescence spectra of 1 and 2 at room temperature are observed to have their main emission at 552 nm and 444 nm (λ_ex=346 nm for 1, 369 nm for 2), respectively, which is mainly assigned to the ligand-metal charge transfer (LMCT).

Key words: coordination compound, photo-stability, fluorescence property, 3D framework, ligand-metal charge transfer

CLC Number:

O641.4

LIU Peng, CHEN Hongxia. Two Pb(Ⅱ)/Ag(I) Coordination Polymers Constructed by the Same Mixed Ligand and Their Fluorescence Properties[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(8): 1444-1451.

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