Related Experiment Video
Updated: Aug 5, 2026
09:27
Immobilization of Multi-biocatalysts in Alginate Beads for Cofactor Regeneration and Improved Reusability
Published on: April 22, 2016
Gradient orbital coupling to boost radical adsorption on Cu atom sites for efficient biocatalytic performance
Meili Guo1, Zifeng Wei1, Xiaoyan Xue1
1Department of Physics, School of Science, Tianjin Chengjian University, Tianjin 300384, China.
Colloids and Surfaces. B, Biointerfaces
|August 3, 2026
Summary
Copper-doped molybdenum disulfide (Cu-MoS2) exhibits significantly enhanced enzyme-mimetic activity, showing potent antioxidant properties and therapeutic effects in acute kidney injury models.
Area of Science:
- Biomedical Engineering
- Materials Science
- Nanotechnology
Background:
- Molybdenum disulfide (MoS2) has potential biomedical applications but limited inherent enzyme-mimetic activity.
- Enhancing the biocatalytic properties of MoS2 is crucial for its effective use in biomedical applications.
Purpose of the Study:
- To investigate the effect of copper (Cu) doping on the enzyme-mimetic activity of MoS2.
- To explore the potential of Cu-doped MoS2 (Cu-MoS2) as a nanocatalyst for biomedical applications, particularly in treating acute kidney injury.
Main Methods:
- Synthesized Cu-doped MoS2 (Cu-MoS2) and characterized its structure and properties.
- Evaluated the enzyme-mimetic activity, including superoxide dismutase (SOD)-like and catalase (CAT)-like activities.
- Assessed the reactive species scavenging capability and antioxidant properties in vitro.
- Investigated the therapeutic efficacy of Cu-MoS2 in a mouse model of acute kidney injury.
Main Results:
- Cu doping induced d-p-d gradient orbital coupling in MoS2, forming covalent Cu-S-Mo bonds.
- Cu-MoS2 exhibited approximately 40-fold higher SOD-like activity and excellent CAT-like performance compared to pure MoS2.
- Demonstrated broad-spectrum reactive species scavenging, including •OH, O2•−, and ONOO−, with high elimination rates for ABTS•+.
- Cu-MoS2 showed significant therapeutic efficacy in ameliorating acute kidney injury in a mouse model.
Conclusions:
- Orbital coupling engineering via Cu doping effectively enhances the biocatalytic activity of MoS2.
- Cu-MoS2 possesses potent antioxidant properties and demonstrates therapeutic potential for acute kidney injury.
- This study provides novel insights for designing advanced nanocatalysts for complex biomedical challenges.
More Related Videos
Related Concept Videos
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
01:13Introduction to Mechanisms of Enzyme Catalysis
For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes a mild...
01:27¹H NMR: Long-Range Coupling
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
01:11Radical Reactivity: Overview
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired molecule. These three...
01:20Radical Reactivity: Concentration Effects
In a radical reaction, the concentration of starting materials governs the selectivity of a radical. For example, the reaction between an alkyl halide and an alkene, in the presence of tin hydride and AIBN, begins with the generation of a tin radical. The generated radical then abstracts halogen from the alkyl halide, producing an alkyl radical. This alkyl radical can either react with tin hydride, yielding an alkane, or add to an alkene, generating a nitrile-stabilized radical, eventually...
01:20Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...