Photoluminescence of Zinc Complexes: Easily Tunable Optical Properties by Variation of the Bridge Between the Imido Groups of Schiff Base Ligands

Dumur, Frédéric; Contal, Emmanuel; Wantz, Guillaume; Gigmès, Didier

doi:10.1002/ejic.201402422

Cited by 68 publications

(66 citation statements)

References 62 publications

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“…Although an enhancement of the quantum yield of luminescence was observed for Schiff base ligand, no significant variation of the luminescence lifetime was observed. In particular, the lifetimes were determined to be in the nanosecond timescale, which is consistent with values previously determined for fluorescent zinc complexes [ 13 ].…”

Section: Resultssupporting

confidence: 86%

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Luminescent Properties of Zn and Mg Complexes on N-(2-Carboxyphenyl)salicylidenimine Basis

Гусев¹,

Braga²,

Шульгин³

et al. 2017

Materials

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New zinc and magnesium complexes of N-(2-carboxyphenyl)salicylidenimine) were synthesized and structurally characterized by elemental analysis, FT-IR, and X-ray single-crystal analysis. These complexes exhibit tuneable luminescence in the solid state from blue to green by varying by metal ion and composition. Moreover, the quantum yields range from 0.11 to 0.41, while lifetimes were determined to be in the nanosecond timescale. Thermal analysis shows that these complexes exhibit good thermal stability and can therefore well be used as electroluminescent materials.

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Section: Resultssupporting

confidence: 86%

“…In addition, luminescent properties of zinc(II) complexes are determined only by the organic ligand because the d-shell of the central ion is completely filled. The luminescent properties of these compounds can be easily varied by changing the nature of substituents in the composition of the ligands [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Luminescent Properties of Zn and Mg Complexes on N-(2-Carboxyphenyl)salicylidenimine Basis

Гусев¹,

Braga²,

Шульгин³

et al. 2017

Materials

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“…The solution spectrum of [Zn(sal)](H 2 O) displayed two absorption bands. The first absorption band centered in the range of 260-300 nm could be assigned to a π-π* transition of the aromatic part and n-π* electronic transitions of the nonbonding electrons of the azomethine nitrogen atoms [76]. The second absorption band in the range of 320-400 nm could be attributed to intermolecular metal-ligand interactions within the whole complex (metal-ligand (d-π*) charge transfer (MLCT band)) [77,78].…”

Section: Synthesis and Spectroscopic Characterizationmentioning

confidence: 99%

Structural, Spectroscopic, and Chemical Bonding Analysis of Zn(II) Complex [Zn(sal)](H2O): Combined Experimental and Theoretical (NBO, QTAIM, and ELF) Investigation

et al. 2020

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The Zn(II) complex of salen-like scaffold [Zn(sal)](H2O) was synthesized and characterized by elemental analysis, IR, UV–Vis, and 1H-NMR spectroscopic techniques. The structure of complex was confirmed by single crystal X-ray diffraction studies. In the complex, Zn (II) was placed in the inner N2O2 compartment of the salen scaffold in square planar geometry and crystallized in the monoclinic space group P21/n. DFT and TDDFT calculations were performed to reproduce the experimentally observed structural and spectroscopic (IR and UV–vis) findings. The bonding of the Zn(II) framework in the [Zn(sal)](H2O) complex was explored in depth. The theoretical approaches employed were perturbation theory within the context of the natural bond orbital (NBO) framework, and quantum theory of atoms in molecule (QTAIM) and electron localization function (ELF) analysis. The study begins by delineating the difference between the NBO and QTAIM approaches. This paper thus exhibits the supportive nature of NBO theory and QTAIM in discussion of the bonding in the [Zn(sal)](H2O) complex, when both the methodologies are used in combination.

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“…To illustrate the difference of costs, the Pt precursor (PtCl 2 ) is approximately 1100 times more expensive than Zn(OAc) 2 .2H 2 O (0.15 €/gram) which is the standard reagent for the synthesis of Schiff base Zn(II) chelates, and IrCl 3 .2H 2 O is 450 times more expensive than Zn(OAc) 2 .2H 2 O [73]. Considering that reaction yields for the synthesis of Schiff base Zn(II) chelates range between 60% and 90% [74], and that zinc is clearly less toxic than Ru, Ir, and Pt, Schiff base Zn(II) chelates have been thus examined for photopolymerization [75]. However, contrarily to the previous complexes that were phosphorescent materials, meaning that these complexes exhibit long-living excited states in the microsecond timescale, a different situation is found for Zn complexes.…”

Section: Zinc Complexesmentioning

confidence: 99%

Recent Advances on Visible Light Metal-Based Photocatalysts for Polymerization under Low Light Intensity

Dumur

2019

Catalysts

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In recent years, polymerization processes activated by light have attracted a great deal of interest due to the wide range of applications in which this polymerization technique is involved. Parallel to the traditional industrial applications ranging from inks, adhesives, and coatings, the development of high-tech applications such as nanotechnology and 3D-printing have given a revival of interest to this polymerization technique known for decades. To initiate a photochemical polymerization, the key element is the molecule capable to interact with light, i.e., the photoinitiator and more generally the photoinitiating system, as a combination of several components is often required to create the reactive species responsible for the polymerization process. With the aim of reducing the photoinitiator content while optimizing the polymerization yield and/or the polymerization speed, photocatalytic systems have been developed, enabling the photosensitizer to be regenerated during the polymerization process. In this review, an overview of the photocatalytic systems developed for polymerizations carried out under a low light intensity and visible light is provided. Over the years, a wide range of organometallic photocatalysts has been proposed, addressing both the polymerization efficiency and/or the toxicity, as well as environmental issues.

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Photoluminescence of Zinc Complexes: Easily Tunable Optical Properties by Variation of the Bridge Between the Imido Groups of Schiff Base Ligands

Cited by 68 publications

References 62 publications

Luminescent Properties of Zn and Mg Complexes on N-(2-Carboxyphenyl)salicylidenimine Basis

Luminescent Properties of Zn and Mg Complexes on N-(2-Carboxyphenyl)salicylidenimine Basis

Structural, Spectroscopic, and Chemical Bonding Analysis of Zn(II) Complex [Zn(sal)](H2O): Combined Experimental and Theoretical (NBO, QTAIM, and ELF) Investigation

Recent Advances on Visible Light Metal-Based Photocatalysts for Polymerization under Low Light Intensity

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