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Abstract <p>4,6-Di(1,2,4-triazol-1-yl)-2,1,3-benzoxadiazole (<b>4,6-Tr</b><sub><b>2</b></sub><b>bod</b>) is obtained for the first time with a 34% yield by the heteroarylation reaction with 4,6-dibromo-2,1,3-benzoxadiazole and 1<i>H</i>-1,2,4-triazole in the superbasic K<sub>3</sub>PO<sub>4</sub>/DMSO medium. By the interaction of the obtained <b>4,6-Tr</b><sub><b>2</b></sub><b>bod</b> ligand with thiophendicarboxylic acid (H<sub>2</sub>TDC) and cadmium nitrate, 2D metal-organic coordination polymer (CP) {[Cd(TDC)(4,6-Tr<sub>2</sub>bod)(H<sub>2</sub>O)]·H<sub>2</sub>O·DMF}<sub><i>n</i></sub> is formed with a 39% yield. The obtained compounds are characterized by IR and NMR spectroscopy and the elemental analysis. By the single crystal X-ray diffraction analysis of CP formed it is found that the polymer crystallizes in the triclinic crystal system with space group <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$P\bar{1}$</EquationSource> </InlineEquation> and has a 2D layered structure where chains of cadmium cations and thiophene-dicarboxylate anions are bridged by <b>4,6-Tr</b><sub><b>2</b></sub><b>bod</b> ligands. From the thermogravimetric analysis data it follows that this CP is thermally stable up to 335&#xa0;°C. The study of the luminescent properties reveals that upon 320&#xa0;nm excitation, the polymer demonstrates intense photoluminescence with the maximum at 502&#xa0;nm, a quantum yield of 16%, and the excited state lifetime of 8.9&#xa0;ns.</p>

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Synthesis, Structure, and Luminescent Properties of the Cadmium Metal-Organic Coordination Polymer Based on 4,6-di(1,2,4-triazol-1-yl)-2,1,3-Benzoxadiazole

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • V. V. Pavlova,
  • D. I. Pavlov,
  • A. A. Gulenko,
  • A. A. Ryadun,
  • A. S. Potapov

摘要

Abstract

4,6-Di(1,2,4-triazol-1-yl)-2,1,3-benzoxadiazole (4,6-Tr2bod) is obtained for the first time with a 34% yield by the heteroarylation reaction with 4,6-dibromo-2,1,3-benzoxadiazole and 1H-1,2,4-triazole in the superbasic K3PO4/DMSO medium. By the interaction of the obtained 4,6-Tr2bod ligand with thiophendicarboxylic acid (H2TDC) and cadmium nitrate, 2D metal-organic coordination polymer (CP) {[Cd(TDC)(4,6-Tr2bod)(H2O)]·H2O·DMF}n is formed with a 39% yield. The obtained compounds are characterized by IR and NMR spectroscopy and the elemental analysis. By the single crystal X-ray diffraction analysis of CP formed it is found that the polymer crystallizes in the triclinic crystal system with space group $P\bar{1}$ and has a 2D layered structure where chains of cadmium cations and thiophene-dicarboxylate anions are bridged by 4,6-Tr2bod ligands. From the thermogravimetric analysis data it follows that this CP is thermally stable up to 335 °C. The study of the luminescent properties reveals that upon 320 nm excitation, the polymer demonstrates intense photoluminescence with the maximum at 502 nm, a quantum yield of 16%, and the excited state lifetime of 8.9 ns.