Synthesis, Crystal Structures and Fluorescent Properties of Zn(II) Complexes Based on 4-Hydroxyisophthalic Acid and Nitrogen-Containing Heterocyclic Ligands

Abstract

Abstract: Under hydrothermal method condition, 4-hydroxyisophthalic acid (H₂HPHA) and Zn(II) ions reacted with 1,2-di(pyridin-4-yl) ethene (dpee) and 4,4-bipyridine (4,4′-bpy) to obtain two coordination polymers [[Zn(HPHA)(dpee)·(DMA)₂]_n (complex 1) and [Zn(HPHA)₂(4,4′-bpy)₂·DMA]_n (complex 2). The crystal structures were determined by single crystal X-ray diffraction method. The results show that complex 1 crystallizes in the monoclinic space group C2 with each asymmetric unit consisting of one Zn(II) ion, one 4-hydroxyisophthalic acid ligand and one 1,2-di(pyridin-4-yl)ethene ligand. Complex 2 crystallizes in the monoclinic space group P12/c1 with each asymmetric unit consisting of two Zn(II) ions, two 4-hydroxyisophthalic acid ligands and two 4,4′-bipyridine ligands. Fluorescence spectrum analysis show that the excitation peak of complex 1 is 251 nm, emission peak is 397 nm. The complex 2 is 415 nm, emission peak is 513 nm. The thermal stability study shows that the complexes are stable at room temperature.

Key words: zinc(II) complex, 4-hydroxyisophthalic acid, 1,2-di(pyridin-4-yl)ethene, 4,4′-bipyridine, hydrothermal method, crystal structure, fluorescence spectrum

CLC Number:

O614.121

LI Bo, WANG Feiyu, SHEN Hong, MAO Fengyin, LI Yonghui. Synthesis, Crystal Structures and Fluorescent Properties of Zn(II) Complexes Based on 4-Hydroxyisophthalic Acid and Nitrogen-Containing Heterocyclic Ligands[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(4): 692-700.

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