Issue 13, 2022

Platinum(ii)–gold(i) heterotrinuclear complexes with N,N′-diarylamine-functionalized acetylide ligands for red electroluminescence

Abstract

In this work, 4-substituted phenylacetylides with electron-rich N,N′-diarylamine groups are used for the design of triphosphine-supported PtAu2 complexes with red phosphorescence. Although PtAu2 complex 1 with 4-ethynyl-N,N′-diphenylaniline displays orange emission in CH2Cl2 solution, highly efficient red phosphorescence is attained upon using 5-ethynyl-N,N′-diphenylthiophen-2-amine (2) or 2-ethynyl-4-phenyl-4H-dithieno[3,2-b:2′,3′-d]pyrrole (3) in place of 4-ethynyl-N,N-diphenylaniline (1). In contrast to the intense phosphorescence of complexes 1 and 3 in degassed CH2Cl2 solution at ambient temperature, complex 2 shows a quite weak phosphorescence as well as fluorescence of the acetylide ligand due to incomplete energy transfer from acetylide ligands to PtAu2 centres. Since the phosphorescence efficiency of the doping films is as high as 98.3%, complexes 1–3 are excellent phosphorescent dopants in organic light-emitting diodes (OLEDs). Solution-processed OLEDs showed high-efficiency yellow emission for complex 1 (λEL = 567 nm), whereas orange-red phosphorescence for 2 (λEL = 624 nm) and deep red emission for 3 (λEL = 625 nm) with a peak external quantum efficiency of 16.5%, 8.4% and 13.6%, respectively.

Graphical abstract: Platinum(ii)–gold(i) heterotrinuclear complexes with N,N′-diarylamine-functionalized acetylide ligands for red electroluminescence

Supplementary files

Article information

Article type
Research Article
Submitted
27 Mar 2022
Accepted
02 May 2022
First published
03 May 2022

Inorg. Chem. Front., 2022,9, 3156-3164

Platinum(II)–gold(I) heterotrinuclear complexes with N,N′-diarylamine-functionalized acetylide ligands for red electroluminescence

H. Zeng, J. Wang, L. Shi, L. Zhang and Z. Chen, Inorg. Chem. Front., 2022, 9, 3156 DOI: 10.1039/D2QI00657J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements