Tetradentate Pt(II) Complexes Based on Xylenylamino Linked Dual Pyrazolate Chelates for Organic Light Emitting Diodes

Fan Zhou; Yi Pan; Wen-Yi Hung; Ching-Feng Chen; Kui-Ming Chen; Jian-Liang Li; Shek-Man Yiu; Yi-Mei Liu; Pi-Tai Chou; Yun Chi; Kai-Chung Lau

doi:10.1002/chem.202402636

Tetradentate Pt(II) Complexes Based on Xylenylamino Linked Dual Pyrazolate Chelates for Organic Light Emitting Diodes

Fan Zhou
, Yi Pan
, Wen-Yi Hung^*
, Ching-Feng Chen
, Kui-Ming Chen
, Jian-Liang Li
, Shek-Man Yiu
, Yi-Mei Liu
, Pi-Tai Chou^*
, Yun Chi^*
, Kai-Chung Lau^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

7 Citations (Scopus)

38 Downloads (CityUHK Scholars)

Abstract

In this work, we report the syntheses of three Pt(II) emitters, namely, Pt4N1, Pt4N2, and Pt4N3, to which their tetradentate chelates were assembled by linking two pyrazolate chelates with a single xylenylamino entity. Functionalization of Pt4N1 was achieved upon the addition of electronegative CF₃ substituent on pyridinyl groups and switching to more electron-deficient pyrazinyl groups in giving Pt4N2 and Pt4N3, respectively. The vertically arranged xylenylamino entity has effectively suppressed the inter-molecular π-π stacking and Pt⋅⋅⋅Pt interaction, as shown by the single crystal X-ray structural analyses. Upon fabrication of OLED devices, Pt4N2 and Pt4N3 based devices delivered efficient cyan and green emission, with an EQE_max of 15.2 % and 11.2 %, respectively, affirming the successfulness of the tetradentate chelating strategy. © 2024 The Author(s). Chemistry - A European Journal published by Wiley-VCH GmbH.

Original language	English
Article number	e202402636
Journal	Chemistry - A European Journal
Volume	30
Issue number	58
Online published	7 Aug 2024
DOIs	https://doi.org/10.1002/chem.202402636
Publication status	Published - 17 Oct 2024

Funding

This work was supported by the grants from Research Grant Council (CityU 11304221 and CityU 11312722) and City University of Hong Kong, Hong Kong SAR, and from National Science and Technology Council of Taiwan (NSTC 112-2112-M-019-002). The computational studies were carried out using the High-Performance Computing facility, CityU Burgundy at City University of Hong Kong.

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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title = "Tetradentate Pt(II) Complexes Based on Xylenylamino Linked Dual Pyrazolate Chelates for Organic Light Emitting Diodes",

abstract = "In this work, we report the syntheses of three Pt(II) emitters, namely, Pt4N1, Pt4N2, and Pt4N3, to which their tetradentate chelates were assembled by linking two pyrazolate chelates with a single xylenylamino entity. Functionalization of Pt4N1 was achieved upon the addition of electronegative CF3 substituent on pyridinyl groups and switching to more electron-deficient pyrazinyl groups in giving Pt4N2 and Pt4N3, respectively. The vertically arranged xylenylamino entity has effectively suppressed the inter-molecular π-π stacking and Pt⋅⋅⋅Pt interaction, as shown by the single crystal X-ray structural analyses. Upon fabrication of OLED devices, Pt4N2 and Pt4N3 based devices delivered efficient cyan and green emission, with an EQEmax of 15.2 \% and 11.2 \%, respectively, affirming the successfulness of the tetradentate chelating strategy. {\textcopyright} 2024 The Author(s). Chemistry - A European Journal published by Wiley-VCH GmbH.",

author = "Fan Zhou and Yi Pan and Wen-Yi Hung and Ching-Feng Chen and Kui-Ming Chen and Jian-Liang Li and Shek-Man Yiu and Yi-Mei Liu and Pi-Tai Chou and Yun Chi and Kai-Chung Lau",

year = "2024",

month = oct,

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doi = "10.1002/chem.202402636",

language = "English",

volume = "30",

journal = "Chemistry - A European Journal",

issn = "0947-6539",

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TY - JOUR

T1 - Tetradentate Pt(II) Complexes Based on Xylenylamino Linked Dual Pyrazolate Chelates for Organic Light Emitting Diodes

AU - Zhou, Fan

AU - Pan, Yi

AU - Hung, Wen-Yi

AU - Chen, Ching-Feng

AU - Chen, Kui-Ming

AU - Li, Jian-Liang

AU - Yiu, Shek-Man

AU - Liu, Yi-Mei

AU - Chou, Pi-Tai

AU - Chi, Yun

AU - Lau, Kai-Chung

PY - 2024/10/17

Y1 - 2024/10/17

N2 - In this work, we report the syntheses of three Pt(II) emitters, namely, Pt4N1, Pt4N2, and Pt4N3, to which their tetradentate chelates were assembled by linking two pyrazolate chelates with a single xylenylamino entity. Functionalization of Pt4N1 was achieved upon the addition of electronegative CF3 substituent on pyridinyl groups and switching to more electron-deficient pyrazinyl groups in giving Pt4N2 and Pt4N3, respectively. The vertically arranged xylenylamino entity has effectively suppressed the inter-molecular π-π stacking and Pt⋅⋅⋅Pt interaction, as shown by the single crystal X-ray structural analyses. Upon fabrication of OLED devices, Pt4N2 and Pt4N3 based devices delivered efficient cyan and green emission, with an EQEmax of 15.2 % and 11.2 %, respectively, affirming the successfulness of the tetradentate chelating strategy. © 2024 The Author(s). Chemistry - A European Journal published by Wiley-VCH GmbH.

AB - In this work, we report the syntheses of three Pt(II) emitters, namely, Pt4N1, Pt4N2, and Pt4N3, to which their tetradentate chelates were assembled by linking two pyrazolate chelates with a single xylenylamino entity. Functionalization of Pt4N1 was achieved upon the addition of electronegative CF3 substituent on pyridinyl groups and switching to more electron-deficient pyrazinyl groups in giving Pt4N2 and Pt4N3, respectively. The vertically arranged xylenylamino entity has effectively suppressed the inter-molecular π-π stacking and Pt⋅⋅⋅Pt interaction, as shown by the single crystal X-ray structural analyses. Upon fabrication of OLED devices, Pt4N2 and Pt4N3 based devices delivered efficient cyan and green emission, with an EQEmax of 15.2 % and 11.2 %, respectively, affirming the successfulness of the tetradentate chelating strategy. © 2024 The Author(s). Chemistry - A European Journal published by Wiley-VCH GmbH.

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U2 - 10.1002/chem.202402636

DO - 10.1002/chem.202402636

M3 - RGC 21 - Publication in refereed journal

SN - 0947-6539

VL - 30

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 58

M1 - e202402636

ER -

Tetradentate Pt(II) Complexes Based on Xylenylamino Linked Dual Pyrazolate Chelates for Organic Light Emitting Diodes

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GRF: Thermally Activated Delayed Fluorescent Organoboron Materials and Hyperphosphorescence

GRF: Iridium(III) Blue Phosphors with Carbene-Based Chromophoric Chelate

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Tetradentate Pt(II) Complexes Based on Xylenylamino Linked Dual Pyrazolate Chelates for Organic Light Emitting Diodes

Abstract

Funding

Publisher's Copyright Statement

RGC Funding Information

Access Output

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GRF: Thermally Activated Delayed Fluorescent Organoboron Materials and Hyperphosphorescence

GRF: Iridium(III) Blue Phosphors with Carbene-Based Chromophoric Chelate

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