Charged dinuclear Cu(I) complexes for solution-processed single-emitter warm white organic light-emitting devices

Yang, Xiaolong; Yan, Xiaogang; Guo, Haoran; Liu, Boao; Zhao, Jiang; Zhou, Guijiang; Wu, Yong; Wu, Zhaoxin; Wong, Wai Yeung

doi:10.1016/j.dyepig.2017.04.036

Cited by 20 publications

(5 citation statements)

References 38 publications

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“…Incorporation of sterically bulky ligands into metal complexes is a well explored but ever growing field due to the fact that the steric bulk of the ligand facilitates the fine-tuning of physical and chemical properties of the complexes. [1][2][3][4][5][6] This feature is highly pivotal specially in tailoring activity and selectivity of catalytically active complexes [7][8][9][10] as well as for the synthesis and stabilization of low-valent metal complexes. [11][12][13][14][15] Among these, bulky Schiff base derivatives are of special importance due to their ease of synthesis and strong affinity of the imino-nitrogen for most of the metal systems.…”

Section: Introductionmentioning

confidence: 99%

Sterically encumbered 2,6-dibenzhydryl-4-methylphenyl derived ligand systems: synthesis and structures

Saxena

2017

J Chem Sci

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Bulky 2,6-dibenzhydryl-4-methylaniline, I undergoes diazotization upon treatment with H 2 SO 4 /NaNO 2 , which upon further reaction with KI affords 1-iodo-2,6-dibenzhydryl-4-methylbenzene, 1. Reaction of I with one equivalent of acetylacetone in ethanol under reflux condition affords mono-Schiff base, 4-(2,6-dibenzhydryl-4-methylphenylamino)pent-3-ene-2-one, 2. Similarly, I reacts with half equivalent of 2-hydroxy-5-methylisophthalaldehyde or one-third equivalent of 2,4,6-trihydroxybenzene-1,3,5tricarbaldehyde in ethanol under reflux condition to afford bis-Schiff base, 2,6-bis(((2,6-dibenzhydryl-4-methylphenyl)imino)methyl)-4-methylphenol, 3 and tris-Schiff base, 2,4,6-tris(((2,6-dibenzhydryl-4methylphenyl)amino)methylene)cyclohexane-1,3,5-trione, 4, respectively. Further, I upon reaction with triflic acid affords (2,6-dibenzhydryl-4-methylphenyl)ammonium triflate, 5 whereas upon reaction with HBr and HCl affords co-crystals I•HBr, 6 and I•HCl, 7. All the new products were isolated in moderate to good yield and characterized by spectroscopic (IR, ESI-mass, NMR, UV-Vis) and microanalytical (CHN) techniques, in addition to a single crystal X-ray diffraction study for 1, 2 and 4-7.

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Section: Introductionmentioning

confidence: 99%

Sterically encumbered 2,6-dibenzhydryl-4-methylphenyl derived ligand systems: synthesis and structures

Saxena

2017

J Chem Sci

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“…72 (vi) Dinuclear complexes have relatively large molecular weights so they generally cannot be thermally evaporated to form thin films when making optoelectronic devices, requiring solution processing instead. [73][74][75][76][77] Therefore, it is not surprising that dinuclear systems have attracted less attention than mononuclear counterparts. Nonethless, important progress has been made with dinuclear metal complexes in optoelectronic applications, as summarised in Fig.…”

Section: Introductionmentioning

confidence: 99%

Dinuclear metal complexes: multifunctional properties and applications

et al. 2020

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“…A cuprous system is desirable for developing low-cost stimuli-responsive luminescence materials because of its easily distorted coordination geometry and adjustable luminescence properties. − We had most recently reported a family of novel 5-(2′-pyridyl)tetrazole-based mechanochromic luminescent tetranuclear Cu(I) complexes . All of those tetranuclear Cu(I) complexes included two identical {Cu 2 (μ-dppa) 2 } (dppa = bis(diphenylphosphino)amine) moieties in a boat–chair configuration and a coplanar {Cu 4 (μ 3 -η 2 ( N , N ),η 1 ( N ),η 1 ( N )-pyridyltetrazole) 2 } fragment whose two pyridyl rings form weak intramolecular π···π interactions with the phenyl rings of two coordinated dppa ligands within the same molecule.…”

Section: Introductionmentioning

confidence: 99%

A Mechanochromic and Vapochromic Luminescent Cuprous Complex Based on a Switchable Intramolecular π···π Interaction

Peng

et al. 2021

Inorg. Chem.

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An in-depth study on a stimuli-responsive tetranuclear cuprous luminescent complex is reported and gives new insights into the origin and possible use of the observed stimuli-responsive luminescence. Its crystalline polymorphs with two different shapes are obtained by using different crystallization solvents and show distinct emissions, with one being blue emissive and the other being yellow emissive. Upon grinding, only the blue-emitting polymorph has a marked change in the emission color from blue to yellow, and its ground sample exhibits a yellow emission similar to that of the yellow-emitting polymorph. Interestingly, the yellow-emitting polymorph after exposure to acetone vapor can emit a blue emission and display luminescence mechanochromism similar to that of the blue-emitting polymorph. Single-crystal structural analyses of the two different polymorphs reveal the relationship between the mechanochromic luminescence and the geometrical configuration of the {Cu(μ-dppm)2Cu} unit and intramolecular “pyridyl/phenyl” π···π interactions, supported as well by their PXRD, FT-IR, TGA, and PL studies in various states and by TD-DFT analyses. The results demonstrate the different roles of switchable intramolecular π···π interactions and the geometrical configuration of the {Cu(μ-dppm)2Cu} unit in this stimuli-responsive luminescence and potential applications of such stimuli-responsive luminescence in optical sensing and anticounterfeiting encryption technologies and deepen the understanding of such stimuli-responsive luminescence originating from switchable intramolecular π···π interactions. In addition, it is clearly suggested that the rational utilization of switchable intramolecular π···π interactions is a feasible route for developing stimuli-responsive intelligent luminescent materials and devices.

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Charged dinuclear Cu(I) complexes for solution-processed single-emitter warm white organic light-emitting devices

Cited by 20 publications

References 38 publications

Sterically encumbered 2,6-dibenzhydryl-4-methylphenyl derived ligand systems: synthesis and structures

Sterically encumbered 2,6-dibenzhydryl-4-methylphenyl derived ligand systems: synthesis and structures

Dinuclear metal complexes: multifunctional properties and applications

A Mechanochromic and Vapochromic Luminescent Cuprous Complex Based on a Switchable Intramolecular π···π Interaction

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