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Abstract <p>Two new complexes, {[Cd(4-Nbdc)(Htrz)(H<sub>2</sub>O)]·3H<sub>2</sub>O}<sub><i>n</i></sub>, {[Zn(4-Nbdc)(bpeb)]·H<sub>2</sub>O}<sub><i>n</i></sub> [H<sub>2</sub>4-Nbdc = 4-nitrobenzene-1,2-dicarboxylic acid, Htrz = 1,2,4-1<i>H</i>-triazole, bpeb = 1,3-bis(2-(4-pyridyl)ethenyl)benzene] were hydrothermally synthesized and characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis and fluorescence properties. The complex {[Cd(4-Nbdc)(Htrz)(H<sub>2</sub>O)]·3H<sub>2</sub>O}<sub><i>n</i></sub> exhibits a 2D layer featuring left-hand and right-hand metal-carboxylate chains. Complex {[Zn(4-Nbdc)(bpeb)]·H<sub>2</sub>O}<sub><i>n</i></sub> shows a 2D network containing dinuclear units [Zn<sub>2</sub>(4-Nbdc)<sub>2</sub>]. The complex {[Cd(4-Nbdc)(Htrz)(H<sub>2</sub>O)]·3H<sub>2</sub>O}<sub><i>n</i></sub> can maintain the stability of the skeleton structure even after losing all water molecules at 140°C. The collapse temperatures of both complexes are above 200°C, hence they have good thermal stability. Both complexes exhibit similar broad fluorescence emission to that of the H<sub>2</sub>4-Nbdc ligand. A slightly blue-shift (~30 nm) in {[Cd(4-Nbdc)· (Htrz)(H<sub>2</sub>O)]·3H<sub>2</sub>O}<sub><i>n</i></sub> and a red-shift (~40 nm) in {[Zn(4-Nbdc)(bpeb)]·H<sub>2</sub>O}<sub><i>n</i></sub> may be due to the absence or presence of π···π stacking interactions.</p>

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Synthesis, Crystal Structure, and Fluorescence Properties of Two Coordination Polymers Based on 4-Nitrobenzene-1,2-dicarboxylic Acid

  • 期刊论文

  • 发表日期：

    2026年5月17日

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  • Guilian Li,
  • Mengni Qi,
  • Meng Wu,
  • Guangzhen Liu

摘要

Abstract

Two new complexes, {[Cd(4-Nbdc)(Htrz)(H2O)]·3H2O}n, {[Zn(4-Nbdc)(bpeb)]·H2O}n [H24-Nbdc = 4-nitrobenzene-1,2-dicarboxylic acid, Htrz = 1,2,4-1H-triazole, bpeb = 1,3-bis(2-(4-pyridyl)ethenyl)benzene] were hydrothermally synthesized and characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis and fluorescence properties. The complex {[Cd(4-Nbdc)(Htrz)(H2O)]·3H2O}n exhibits a 2D layer featuring left-hand and right-hand metal-carboxylate chains. Complex {[Zn(4-Nbdc)(bpeb)]·H2O}n shows a 2D network containing dinuclear units [Zn2(4-Nbdc)2]. The complex {[Cd(4-Nbdc)(Htrz)(H2O)]·3H2O}n can maintain the stability of the skeleton structure even after losing all water molecules at 140°C. The collapse temperatures of both complexes are above 200°C, hence they have good thermal stability. Both complexes exhibit similar broad fluorescence emission to that of the H24-Nbdc ligand. A slightly blue-shift (~30 nm) in {[Cd(4-Nbdc)· (Htrz)(H2O)]·3H2O}n and a red-shift (~40 nm) in {[Zn(4-Nbdc)(bpeb)]·H2O}n may be due to the absence or presence of π···π stacking interactions.