Spiro chiral tetradentate cyclometalated platinum (II) and / or palladium (II) complex circularly polarized luminescence material and use thereof

By designing helical tetradentate ring platinum(II) and/or palladium(II) complexes, and utilizing the central chiral triazole carbene structural fragment to coordinate with metal ions, optically pure helical complexes are formed, solving the problems of insufficient chemical and thermal stability of existing materials and achieving highly efficient circularly polarized light emission performance.

WO2026061183A1 Publication Date: 2026-03-26ZHEJIANG UNIV OF TECH +2
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Patent Information

Application Number
PCT/CN2025/114976
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-09-19
Filing Date
2025-08-15
Publication Date
2026-03-26

AI Technical Summary

Technical Problem

Existing cyclic platinum(II) and/or palladium(II) complex materials have shortcomings in chemical stability, thermal stability and circular polarization luminescence, making them difficult to apply to stable and efficient OLED devices.

Method used

Design helical tetradentate ring metal platinum(II) and/or palladium(II) complexes, and coordinate with metal ions through the central chiral triazole carbene and its derivative structural fragments to form optically pure helical complexes. Utilize the steric hindrance effect to form a twisted quadrilateral configuration, thereby improving chemical and thermal stability.

Benefits of technology

A circularly polarized light-emitting material with high chemical and thermal stability was achieved, eliminating the need for chiral separation, thereby improving the luminescence quantum efficiency and optical purity of the material molecules and reducing the preparation cost.

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Abstract

Provided are a spiro chiral tetradentate cyclometalated platinum (II) and / or palladium (II) complex circularly polarized luminescence material and the use thereof. For the formation of the spiro chiral metal complex molecule, a central chiral fragment in a ligand can autonomously induce the coordination of the entire tetradentate ligand with metal ions in a small steric hindrance manner, so as to form an optically-pure spiro chiral metal complex circularly polarized luminescence material. The induced reaction has stereospecificity, such that the spiro chiral metal complex does not require chiral resolution. The spiro chiral metal complex has significant application value in circularly polarized luminescence elements and related fields.
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