Field- and Temperature-Dependent <sup>13</sup>C NMR Studies of the EDTA–Zn<sup>2+</sup> Complex: Insight into Structure and Dynamics via Relaxation Measurements

Garapati, Sriramya; Burns, Colin; Rodríguez, Amor

doi:10.1021/jp507674a

Cited by 7 publications

(1 citation statement)

References 8 publications

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“…Ethylene diamine tetraacetic acid (EDTA) is an important multidentate ligand that can chelate with many metallic ions. [38] When EDTA was introduced into the gels, it would combine with Zn 2+ instead of the coordination interaction between Zn 2+ and C 4 -Ter, resulting in the degradation of the hydrogels (Figure 1c). The hydrogels regenerated in 30 min when the Zn 2+ was added to the solution, due to the rebuilding of metal-coordination interaction between Zn 2+ and C 4 -Ter.…”

Section: Gelation Behaviormentioning

confidence: 99%

Fluorescent Hydrogel Producing ZnO for Colorimetric Detection of Glutathione and Cysteine

Kang

Tang

Gao

et al. 2021

Adv Materials Inter

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The dynamic and reversible feature of non-covalent interactions endows hydrogel specific response to external stimuli such as temperature, light, pH and oxidant, along with the macroscopic gel-sol transition. [3,[18][19][20] The properties of hydrogels can provide theoretical guidance for their application. However, hydrogels is composed of a large amounts of water and network structure. Since the presence of plenty of water, the hydrogels always have poor mechanical properties, including mechanical strength and viscoelasticity, which greatly influence the application range and the deep insight on the structure-property relationship of hydrogels. Thus, it is very urgent to design LMWGs with functional groups to develop hydrogels with prominent mechanical strength and stability for functional applications. [21][22][23][24] Among the 20 amino acids used as building blocks for proteins, the thiolcontaining amino acids, acting as antioxidants and antidotes, participate in biological activities and metabolic processes, which can retain the cellular defense against xenobiotics, gene regulation, and free radicals signal transduction. [25,26] As the only thiol-containing amino acids, cysteine (Cys) contributes biologically in human body by providing a mode for intermolecular cross-linking of proteins using the disulfide bonding to support the secondary structures and functions. [27] The quantification of Cys is important for accurate prediagnosis of its related disease such as cancer, cardiovascular and cerebrovascular disease. [28] Glutathione (GSH), a thiol-containing tripeptide (l-glutamic acid, l-cysteine, and glycine), is extensively distributed in mammalian and eukaryotic cells. [29] In the tissues, the tripeptide has two forms: reduced (GSH) and oxidized form (GSSH), which maintain the intracellular reduction-oxidation potential. [30] The intracellular level of GSH is a biomarker for various medical conditions and a disease-related physiological regulator. [31] Therefore, it is significant to detect and monitor the Cys and GSH concentration in biological samples as well as cells. Many approaches have been developed for detecting Cys and GSH, such as chromatography, spectroscopy, electrochemistry, and mass spectrometry. However, most of them required sophisticated instrumentation and tedious pretreatment, which Supramolecular hydrogels, based on non-covalent interaction, have outstanding properties, but it is still a big challenge to design hydrogels with higher mechanical properties. In this study, hydrogels with adjustable mechanical properties are prepared by mixing 4′-(4-n-butylimidazole)-pbenzyl-2,2′:6′2″-terpyridine (C 4 -Ter) and zinc ions (Zn 2+ ) in water. The hydrogels are composed of fibrous structure and hierarchical porous structure, which depends on Zn 2+ concentration. Rheological results demonstrate that the hydrogels exhibit prominent mechanical strength with the elastic modulus (G″) and yield stress (τ*) of 200 000 and 1000 Pa, respectively. X-ray diffraction and Fourier-transform infrared spectro...

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Section: Gelation Behaviormentioning

confidence: 99%

Fluorescent Hydrogel Producing ZnO for Colorimetric Detection of Glutathione and Cysteine

Kang

Tang

Gao

et al. 2021

Adv Materials Inter

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CO₂ Hydrogenation to Methanol over Cd₄/TiO₂ Catalyst: Insight into Multifunctional Interface

Meeprasert

Wang

et al. 2022

ChemCatChem

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Supported metal catalysts have shown to be efficient for CO 2 conversion due to their multifunctionality and high stability. Herein, we have combined density functional theory calculations with microkinetic modeling to investigate the catalytic reaction mechanisms of CO 2 hydrogenation to CH 3 OH over a recently reported catalyst of Cd 4 /TiO 2 . Calculations reveal that the metal-oxide interface is the active center for CO 2 hydrogenation and methanol formation via the formate pathway dominates over the reverse water-gas shift (RWGS) pathway. Microkinetic modeling demonstrated that formate species on the surface of Cd 4 /TiO 2 is the relevant intermediate for the production of CH 3 OH, and CH 2 O # formation is the ratedetermining step. These findings demonstrate the crucial role of the Cd-TiO 2 interface for controlling the CO 2 reduction reactivity and CH 3 OH selectivity.This publication is part of a Special Collection on "Supported Nanoparticles and Single-Atoms for Catalysis: Energy and Environmental Applications". Please check the ChemCatChem homepage for more articles in the collection.

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Revealing the Limitation Induced by Hydroxyl in Regulating Solvation Structure of Zn²⁺ and Overcoming Challenges with Hybrid Additives towards Highly Stable Zinc Anodes

Li,

Yang,

Wang

et al. 2024

ChemSusChem

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In the field of electrolyte design for aqueous zinc‐ion batteries (AZIBs), additives containing hydroxyl have been demonstrated to effectively modulate the solvation structure of Zn2+. However, reported studies typically focus solely on the effectiveness of hydroxyl while neglecting the issues that emerge during solvation structure regulation. The strong electron‐attracting capability of Zn2+ attracts electrons from the oxygen in hydroxyl, thereby weakening the strength of hydroxyl, the hydrogen evolution reaction (HER) is also pronounced. This work innovatively reveals the limitation of hydroxyl‐containing additives and proposes a synergistic regulation strategy based on hybrid additives. Arginine with a high isoelectric point is introduced into the electrolyte system containing hydroxyl additives. The protonation effect and electrostatic attraction of arginine enable it to absorb protons at the anode released by the weakened hydroxyl, thereby compensating for the limitation of hydroxyl additives. Under the synergistic action of hybrid additives, the Zn|Zn battery achieved stable deposition/stripping for over 1200 hours under 10 mA cm‐2 and 10 mAh cm‐2. Moreover, the Zn|Cu battery cycled for over 570 hours with a high Coulombic efficiency of 99.82%. This study presents a pioneering perspective for the further application of AZIBs.

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Field- and Temperature-Dependent ¹³C NMR Studies of the EDTA–Zn²⁺ Complex: Insight into Structure and Dynamics via Relaxation Measurements

Cited by 7 publications

References 8 publications

Fluorescent Hydrogel Producing ZnO for Colorimetric Detection of Glutathione and Cysteine

Fluorescent Hydrogel Producing ZnO for Colorimetric Detection of Glutathione and Cysteine

CO₂ Hydrogenation to Methanol over Cd₄/TiO₂ Catalyst: Insight into Multifunctional Interface

Revealing the Limitation Induced by Hydroxyl in Regulating Solvation Structure of Zn²⁺ and Overcoming Challenges with Hybrid Additives towards Highly Stable Zinc Anodes

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Field- and Temperature-Dependent 13C NMR Studies of the EDTA–Zn2+ Complex: Insight into Structure and Dynamics via Relaxation Measurements

Cited by 7 publications

References 8 publications

Fluorescent Hydrogel Producing ZnO for Colorimetric Detection of Glutathione and Cysteine

Fluorescent Hydrogel Producing ZnO for Colorimetric Detection of Glutathione and Cysteine

CO2 Hydrogenation to Methanol over Cd4/TiO2 Catalyst: Insight into Multifunctional Interface

Revealing the Limitation Induced by Hydroxyl in Regulating Solvation Structure of Zn2+ and Overcoming Challenges with Hybrid Additives towards Highly Stable Zinc Anodes

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Product

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Field- and Temperature-Dependent ¹³C NMR Studies of the EDTA–Zn²⁺ Complex: Insight into Structure and Dynamics via Relaxation Measurements

CO₂ Hydrogenation to Methanol over Cd₄/TiO₂ Catalyst: Insight into Multifunctional Interface

Revealing the Limitation Induced by Hydroxyl in Regulating Solvation Structure of Zn²⁺ and Overcoming Challenges with Hybrid Additives towards Highly Stable Zinc Anodes