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Stokes EC, Shoetan IO, Gillman AM, Horton PN, Coles SJ, Woodbury SE, Fallis IA, Pope SJA. Alkyl chain functionalised Ir(iii) complexes: synthesis, properties and behaviour as emissive dopants in microemulsions. RSC Adv 2024; 14:6987-6997. [PMID: 38414995 PMCID: PMC10897649 DOI: 10.1039/d3ra06764e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 02/16/2024] [Indexed: 02/29/2024] Open
Abstract
Six iridium(iii) complexes of the general form [Ir(C^N)2(N^N)]X (where C^N = cyclometalating ligand; N^N = disubstituted 2,2'-bipyridine), and incorporating alkyl chains of differing lengths (C8, C10, C12), have been synthesised and characterised. The complexes have been characterised using a variety of methods including spectroscopies (NMR, IR, UV-Vis, luminescence) and analytical techniques (high resolution mass spectrometry, cyclic voltammetry, X-ray diffraction). Two dodecyl-functionalised complexes were studied for their behaviour in aqueous solutions. Although the complexes did not possess sufficient solubility to determine their critical micelle concentrations (CMC) in water, they were amenable for use as emissive dopants in a N-methyl C12 substituted imidazolium salt microemulsion carrier system with a CMC = 36.5 mM. The investigation showed that the metal doped microemulsions had increased CMCs of 40.4 and 51.3 mM and luminescent properties characterised by the dopant.
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Affiliation(s)
- Emily C Stokes
- School of Chemistry, Cardiff University Main Building Cardiff CF10 3AT UK
| | - Ibrahim O Shoetan
- School of Chemistry, Cardiff University Main Building Cardiff CF10 3AT UK
| | - Alice M Gillman
- School of Chemistry, Cardiff University Main Building Cardiff CF10 3AT UK
| | - Peter N Horton
- Chemistry, UK National Crystallographic Service, Faculty of Natural and Environmental Sciences, University of Southampton Highfield Southampton SO17 1BJ England UK
| | - Simon J Coles
- Chemistry, UK National Crystallographic Service, Faculty of Natural and Environmental Sciences, University of Southampton Highfield Southampton SO17 1BJ England UK
| | - Simon E Woodbury
- National Nuclear Laboratory, Central Laboratory Sellafield, Seascale Cumbria CA20 1PG UK
| | - Ian A Fallis
- School of Chemistry, Cardiff University Main Building Cardiff CF10 3AT UK
| | - Simon J A Pope
- School of Chemistry, Cardiff University Main Building Cardiff CF10 3AT UK
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Yang Y, Zhao H, Zhou W, Zeng Q, Zhang Z, Jiang J, Gong Y, Miao Y, Guo S, Liu Y. Two Novel Neutral Cyclometalated Iridium(III) Complexes Based on 10,11,12,13-Tetrahydrodibenzo[a,c]phenazine for Efficient Red Electroluminescence. Molecules 2023; 28:4865. [PMID: 37375420 DOI: 10.3390/molecules28124865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 06/29/2023] Open
Abstract
Two novel neutral phosphorescent iridium(III) complexes (Ir1 and Ir2) were rationally designed and synthesized with high yields using 10,11,12,13-tetrahydrodibenzo[a,c]phenazine as the main ligand. The two complexes showed bright-red phosphorescence (625 nm for Ir1, and 620 nm for Ir2, in CH2Cl2), high-luminescence quantum efficiency (0.32 for Ir1, and 0.35 for Ir2), obvious solvatochromism and good thermostability. Then, they were used to fabricate high-efficiency red OLEDs via vacuum evaporation; the maximum current efficiency, power efficiency, and external quantum efficiency of the red devices based on Ir1 and Ir2 are 13.47/15.22 cd/A, 10.35/12.26 lm/W, and 10.08/7.48%, respectively.
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Affiliation(s)
- Yuzhen Yang
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Han Zhao
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Weiqiao Zhou
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Qin Zeng
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Zihao Zhang
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Junjie Jiang
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Yongyang Gong
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Yanqin Miao
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan 030024, China
| | - Song Guo
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Yuanli Liu
- Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
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