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Abstract <p>Two Cd(II) coordination polymers, {[Cd(3-NPA)(btmb)(H<sub>2</sub>O)]·H<sub>2</sub>O}<sub><i>n</i></sub> (<b>1</b>) {[Cd(3-NPA)(btmb)(H<sub>2</sub>O)]·1.75H<sub>2</sub>O}<sub><i>n</i></sub> (<b>2</b>) (H<sub>2</sub>3-NPA is 3-nitrophthalic acid, btmb is 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene) were synthesized by the hydrothermal reaction and characterized by single crystal X-ray diffraction. The structures of two complexes are adjusted by metal-ligand ratio. Complex <b>1</b> is a 3D metal organic framework by 3-NPA and btmb ligand linkers at the Cd/btmb ligand ratio of 1 : 2. The Cd(II) is was hepta-coordinate and adopted a slightly distorted [CdO<sub>5</sub>N<sub>2</sub>] pentagonal-bipyramid geometry. Complex <b>2</b> exhibits a two-dimensional layered structure containing a 1D Cd-carboxylate chain in the presence of Cd/btmb ligand ratio of 1 : 1. The Cd(II) is six-coordinated with a slightly distorted [CdO<sub>4</sub>N<sub>2</sub>] octahedral geometry. In addition, powder X-ray diffraction, thermogravimetric analysis and fluorescence spectroscopies of both complexes were investigated. Both complexes show similar emission characteristics with the H<sub>2</sub>3-NPA ligand, which may be used as potentially useful photoactive materials.</p>

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Metal-Ligand Ratio-Controlled Assembly of Two Cadmium(II) Complexes with 1,4-Bis(1,2,4-Triazol-1-Ylmethyl)Benzene Ligand: Syntheses, Structures, and Fluorescence Properties

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Wei-Dong Yin,
  • Gui-Lian Li,
  • Meng Wu,
  • Meng-Ni Qi,
  • Guang-Zhen Liu

摘要

Abstract

Two Cd(II) coordination polymers, {[Cd(3-NPA)(btmb)(H2O)]·H2O}n (1) {[Cd(3-NPA)(btmb)(H2O)]·1.75H2O}n (2) (H23-NPA is 3-nitrophthalic acid, btmb is 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene) were synthesized by the hydrothermal reaction and characterized by single crystal X-ray diffraction. The structures of two complexes are adjusted by metal-ligand ratio. Complex 1 is a 3D metal organic framework by 3-NPA and btmb ligand linkers at the Cd/btmb ligand ratio of 1 : 2. The Cd(II) is was hepta-coordinate and adopted a slightly distorted [CdO5N2] pentagonal-bipyramid geometry. Complex 2 exhibits a two-dimensional layered structure containing a 1D Cd-carboxylate chain in the presence of Cd/btmb ligand ratio of 1 : 1. The Cd(II) is six-coordinated with a slightly distorted [CdO4N2] octahedral geometry. In addition, powder X-ray diffraction, thermogravimetric analysis and fluorescence spectroscopies of both complexes were investigated. Both complexes show similar emission characteristics with the H23-NPA ligand, which may be used as potentially useful photoactive materials.