A simple zinc(<scp>ii</scp>) complex that features multi-functional luminochromism induced by reversible ligand dissociation

Tsukamoto, Takamasa; Aoki, Risa; Sakamoto, Ryota; Toyoda, Ryojun; Shimada, Masaki; Hattori, Yohei; Asaoka, Mizuki; Kitagawa, Yasutaka; Nishibori, Eiji; Nakano, Masayoshi; Nishihara, Hiroshi

doi:10.1039/c6cc10190a

Cited by 27 publications

(16 citation statements)

References 37 publications

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“…It is known that the dynamic metal–ligand coordination bonds undergo reversible dissociation/coordination 34 , 35 . For zinc complex, in the presence of polar solvents, there would be a chemical equilibrium arising from the dissociation/coordination between zinc complex and ligand+zinc salts 36 , thus resulting in the luminescence change. Therefore, the PL spectra change of zinc complex by addition of small amount of pure water was investigated.…”

Section: Resultsmentioning

confidence: 99%

Dynamic metal-ligand coordination for multicolour and water-jet rewritable paper

et al. 2018

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Rewritable paper has recently become prevalent in both academic research and marketplace due to the potential environmental advantages, including forest conservation, pollution reduction, energy saving and resource sustainability. However, its real-life applications are limited by a lack of effective strategy to realize multicolour and water-jet printing on rewritable paper with long legible image-lasting times. Herein, we report an effective strategy to construct rewritable paper based on colour or luminescence switching induced by dynamic metal–ligand coordination. This type of rewritable paper can be conveniently utilized for multicolour water-jet printing by using aqueous solutions containing different metal salts as ink. In addition, the printed images on the water-jet rewritable paper can be retained for a long time (> 6 months), which shows great progress compared to previous work. We believe that this type of rewritable paper could be considered as a prototype for multicolour water-jet printing to meet the practical needs.

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Section: Resultsmentioning

confidence: 99%

Dynamic metal-ligand coordination for multicolour and water-jet rewritable paper

et al. 2018

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“…The binding of this metal can also perturb the intramolecular charge transfer (ICT) that distinctly changes the emission energy of the complex compared to that of the free ligand. [9][10][11][12] Besides, the coordination-driven assembly of two or more chromophore ligands can lead to secondary interactions between the corresponding π-systems and produce aggregates with dynamic optical properties and interligand charge-transfer processes. [13][14][15] In solution, such easily detectable responses allow for efficient luminescence sensing of the Zn(II) ion by a variety of organic probes.…”

Section: Introductionmentioning

confidence: 99%

Diversifying the luminescence of phenanthro-diimine ligands in zinc complexes

Temerova

Kisel

Eskelinen

et al. 2021

Inorg. Chem. Front.

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“…Focusing on the latter, numerous previous works described the significant luminescence behavior of [M(L)X 2 ] (M = Zn, Cd; X = halide) or [Zn(L) n ] 2+ compounds, where L indicates a nitrogen bidentate ligand . Limited examples have been published with N , O ‐ligands, the most relevant being zinc(II) 8‐hydroxyquinolinate complexes (Znq 2 ), which showed highly controllable luminescence properties tuned by substituents on ligand, and high performances in electroluminescent devices .…”

Section: Introductionmentioning

confidence: 99%

Tuning the Fluorescence Emission and HOMO‐LUMO Band Gap in Homoleptic Zinc(II) Complexes with N,O‐Bidentate (Imidazo[1,5‐a]pyrid‐3‐yl)phenols

et al. 2019

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A series of homoleptic zinc(II) complexes of the general formula [Zn(LR)2] (HLR: (imidazo[1,5‐a]pyrid‐3‐yl)phenol; R: para‐substituent to the phenol) have been synthesized. The single‐crystal X‐ray structure analysis of complex [Zn(LH)2] (1) confirmed the expected N,O‐bidentate coordination of LR, via the pyridine‐like nitrogen of the imidazo[1,5‐a]pyridine skeleton and the phenolate oxygen. The photophysical properties of the complexes have been investigated in dichloromethane solution, showing fluorescence emission when excited with UV light (λexc = 340–360 nm). The intensity and λmax of the emission are both significantly influenced by the R‐substituent, the emission maxima moving from blue (R = CF3, Zn(LCF3)2] (6)) to orange (R = NO2, Zn(LNO2)2] (7). Most of [Zn(LR)2] compounds are characterized by moderate‐to‐good absolute photoluminescence quantum yields, with a maximum of 0.33 for [Zn(LH)2] (1). Density functional calculations allowed to identify the Natural Transition Orbitals involved in the electronic transitions and define the main transition as being HOMO‐LUMO (>95 %) in character. A good linear correlation was found between the HOMO energy and the Hammett σp constants associated to the R‐substituent, whereas the fluorescence behavior has been described in terms of HOMO‐LUMO band gap.

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A simple zinc(ii) complex that features multi-functional luminochromism induced by reversible ligand dissociation

Abstract: The authors create a zinc(ii) complex featuring a simple chemical structure but multi-functional luminochromism. Reversible dissociation/association between the zinc center and the terpyridine ligand plays a key role in the multi-functional luminochromism.

Cited by 27 publications

References 37 publications

Dynamic metal-ligand coordination for multicolour and water-jet rewritable paper

Dynamic metal-ligand coordination for multicolour and water-jet rewritable paper

Diversifying the luminescence of phenanthro-diimine ligands in zinc complexes

Tuning the Fluorescence Emission and HOMO‐LUMO Band Gap in Homoleptic Zinc(II) Complexes with N,O‐Bidentate (Imidazo[1,5‐a]pyrid‐3‐yl)phenols

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