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<p>Three lead(II) coordination polymers, [Pb(<i>µ</i><sub>2</sub>-PPTA)(<i>µ</i><sub>3</sub>-acetate)(<i>µ</i><sub>2</sub>-1,1-SCN)]<sub>n</sub> (<b>1</b>), [Pb(<i>µ</i><sub>2</sub>-PPTA)(<i>µ</i><sub>2</sub>-acetate)(<i>µ</i><sub>2</sub>-1,1-SCN)]<sub>n</sub> (<b>2</b>) and [Pb(<i>µ</i><sub>2</sub>-PPTA)(<i>µ</i><sub>2</sub>-acetate)(<i>µ</i><sub>2</sub>-trifluoroacetate)]<sub>n</sub> (<b>3</b>) of 5-phenyl-3-(2-pyridyl)-1,2,4-triazine (PPTA) have been synthesized and characterized by elemental analysis, FT-IR and <sup>1</sup>H NMR spectroscopy, and single crystal X-ray diffraction techniques. The compounds crystallized in the monoclinic space groups <i>P</i>2<sub>1</sub>/<i>c</i> (<b>1</b>), <i>Cc</i> (<b>2</b>) and <i>P</i>2<sub>1</sub>/<i>c</i> (<b>3</b>), respectively and all coordination polymers have highly distorted coordination geometries. The polyhedral of the [PbN<sub>3</sub>O<sub>4</sub>S<sub>2</sub>] (<b>1</b>), [PbN<sub>3</sub>O<sub>3</sub>S<sub>2</sub>] (<b>2</b>) and [PbN<sub>3</sub>O<sub>6</sub>] (<b>3</b>) cores are hemidirected as indicated by a vacant site, which can be attributed to an active inert pair of electrons. The synthesized compounds were investigated for their potential use as emissive layers in organic light emitting devices (OLEDs). Devices were fabricated with an indium tin oxide (ITO)/PEDOT: PSS (70&#xa0;nm)/PVK: PBD: <b>1</b>, <b>2</b> and <b>3</b> coordination polymers (60&#xa0;nm)/Al (180&#xa0;nm) structure. The resultant devices exhibited maximum electroluminescence (EL) emissions ranging from 515&#xa0;nm to 573&#xa0;nm. The recorded absolute quantum yields, electron mobility of devices with space-charge-limited current (SCLC) method, current–voltage characteristics (I–V), luminous efficiency (L-J), and luminescence decay time (L-T) of the coordination polymers have been investigated. It is demonstrated that this new complex is a promising candidate for the fabrication of efficient and tunable (green-orange) OLEDs.</p>

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Three Lead(II) Coordination Polymers with a Derived of 1,2,4-Triazine: Synthesis, Spectroscopy, Crystal Structure, Optical and Electrical Studies, and Application in Organic Light-Emitting Diodes

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • Farzin Marandi,
  • Mohammad Janghouri,
  • Ching Kheng Quah,
  • Nur Aisyah Mohamad Daud

摘要

Three lead(II) coordination polymers, [Pb(µ2-PPTA)(µ3-acetate)(µ2-1,1-SCN)]n (1), [Pb(µ2-PPTA)(µ2-acetate)(µ2-1,1-SCN)]n (2) and [Pb(µ2-PPTA)(µ2-acetate)(µ2-trifluoroacetate)]n (3) of 5-phenyl-3-(2-pyridyl)-1,2,4-triazine (PPTA) have been synthesized and characterized by elemental analysis, FT-IR and 1H NMR spectroscopy, and single crystal X-ray diffraction techniques. The compounds crystallized in the monoclinic space groups P21/c (1), Cc (2) and P21/c (3), respectively and all coordination polymers have highly distorted coordination geometries. The polyhedral of the [PbN3O4S2] (1), [PbN3O3S2] (2) and [PbN3O6] (3) cores are hemidirected as indicated by a vacant site, which can be attributed to an active inert pair of electrons. The synthesized compounds were investigated for their potential use as emissive layers in organic light emitting devices (OLEDs). Devices were fabricated with an indium tin oxide (ITO)/PEDOT: PSS (70 nm)/PVK: PBD: 1, 2 and 3 coordination polymers (60 nm)/Al (180 nm) structure. The resultant devices exhibited maximum electroluminescence (EL) emissions ranging from 515 nm to 573 nm. The recorded absolute quantum yields, electron mobility of devices with space-charge-limited current (SCLC) method, current–voltage characteristics (I–V), luminous efficiency (L-J), and luminescence decay time (L-T) of the coordination polymers have been investigated. It is demonstrated that this new complex is a promising candidate for the fabrication of efficient and tunable (green-orange) OLEDs.