Climate change is one of the largest challenges faced by humanity. To combat this research into alternatives to fossil fuels is ongoing. Dihydrogen is considered a good alternative fuel, since its burning only forms water.

Cultural biographies of persons, objects and 'natural' places in the Bronze Age of the Southern Netherlands, c. 2300-600 BC.

Promotores: Prof.dr. J. Aarts, Prof.dr. J.M. van Ruitenbeek

The demand for neodymium-iron-boron (NdFeB) magnets is rapidly growing, while the neodymium supply chain is under pressure. Recycling can alleviate these issues. This thesis investigates the potential for deploying novel magnet recycling technologies and their environmental consequences.

The focus throughout this thesis will be on gathering fundamental studies of the detailed structure and composition of the electrode/electrolyte interface effect on the rate and mechanism of key electrocatalytic reactions.

Despite the history of studies on methanol formation from CO2, the dominant elementary reaction steps that constitute the chemical mechanism for this catalyzed process are not determined.

Materials with strongly correlated electrons show some of the most mysterious and exotic phases of quantum matter, such as unconventional superconductivity, quantum criticality and strange metal phase.

The main subject of this thesis is the design and synthesis of paramagnetic molecules for protein studies with NMR and EPR spectroscopy.

In condensed matter systems electron-electron interactions, negligible in everyday metals, can dramatically alter the electronic behavior of the system. Examples of such altered behavior include high-temperature superconductivity and modulation of the electron density.

Leiden University has developed a radically different method for large scale production of diverse nanoparticles and their alloys.

This thesis focuses on the X-ray spectral analysis of merging galaxy clusters and the plasma code development for future high-resolution X-ray spectroscopy observations.

In Bronze Age Europe, an enormous amount of metalwork was buried in the ground and never retrieved.

The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.

This thesis explores how electron paramagnetic resonance (EPR) spectroscopy can be used to investigate key biochemical processes.

At the initiative of several of its professors, Leiden University has joined the international Healthy Universities network. Surrounded by space hoppers, the initiators of this move and those present exchanged experiences and tips at the kick-off meeting on 17 October. ‘I don't miss my chauffeur'…

The Master’s Health, Ageing and Society stimulates interdisciplinary thought. Meaning that motivated students with a broad scale of Bachelor backgrounds will potentially be admitted to the programme.

Master's students of Vitality & Ageing work together with older individuals in the so-called ‘Living Lab’ to combat loneliness. You can watch four brief video’s that show their creative solutions for the course ‘the older individual’ that is coordinated by health psychologist Sandra van Dijk and former…

In the Catalysis and Surface Chemistry group, we investigate how catalysis works on the molecular level. The group is divided in six subgroups, focusing on different aspects of heterogeneous catalysis, homogeneous catalysis and electrocatalysis.

Promotor: E. Bouwman, Co-Promotor: S. Bonnet

Metal-based prodrugs based on ruthenium(II) polypyridyl complexes have proven to be very suitable for application in both photodynamic therapy (PDT) and photo-activated chemotherapy (PACT).

Promotor: Prof.dr. E. Bouwman

Projects in the department of Industrial Ecology

Twenty years from now, the world population is estimated to be around 9 billion people (now 8 billion). In combination with the improvements in living standards and the corresponding growth in consumption, this population will result in an enormous increase in the demand for food, consumables, water…

Chemotherapy that does nothing until you irradiate it with light. Sylvestre Bonnet receives a Vici grant of 1.5 million euros for the development of this treatment. The Leiden chemist wants to build a new molecule to fight tumours that are at the time still difficult to treat.

Research at the Catalysis and Surface Chemistry group is comprised of the following research themes:

Chemotherapy that does not harm the body, but effectively fights cancer cells: that is the goal of chemist Sylvestre Bonnet and his team. During his PhD research, chemist Xuequan Zhou brought that goal a little closer. He developed molecules that, upon injection in the bloodstream, self-assemble into…

To design the ideal water oxidation catalyst, understanding of the catalytic mechanism and decomposition pathways is essential.

Theorists have recently made substantial progress in simulating reactive molecule-metal surface scattering but still face major challenges. The grand challenge is to develop an approach that enables accurate predictive calculations of reactions involving electronically excited states with potential…

In this thesis, the researcher developed a nanosystem based on the metallophilic Interaction between cyclometalated complexes.

Promotor: E. Bouwman Co-Promotor: S. Bonnet

Contact Metals in Catalysis, Biomimetics & Inorganic Chemisrty

Photocatalysis has emerged as a powerful tool for enabling challenging transformations in organic synthesis. This thesis explores the development of several photocatalytic reactions designed to form carbon-heteroatom bonds from less-functionalized precursors.

The electrochemical hydrogenation reaction is an alternative approach for the transformation of unsaturated bonds without the use of flammable dihydrogen gas.

This thesis highlights the significant role of surface geometry and oxidation state in determining CO adsorption behavior on copper surfaces.

Indonesia is experiencing various environmental challenges related to its fast economic growth. Therefore, it is necessary to have measurable and applicable indicators to obtain accurate data and information regarding the costs of adverse environmental impacts arising from economic activities to support…

Former PhD, Bachelor and Master students of the Van Exter Lab

LiTechAe: Percussive stone tools related to stone masonry techniques seen through experimentation and use-wear analysis.

Lecture

‘A challenging rollercoaster, but also a very bonding and insightful experience,’ that’s how the team of iGEM Leiden 2022 wraps up their participation in the iGEM contest. The contest for synthetic biology climaxed during the Grand Jamboree in Paris. The team ended up in the top 10 of over 360 teams…

This project aims at determining the market value of hydrogen peroxide (HP) that is produced via our electrochemical methods that have been developed as part of the ERC-StG Cu4Energy project.

In photoactivated chemotherapy (PACT), a biologically active compound is caged by a light-cleavable protecting group.

Cathodic corrosion for producing nanoparticles was (re)discovered when trying to control the electrochemical etching of a scanning tunneling microscopy (STM) tip.

Promotors: Prof.dr. E. Bouwman, Prof.dr. E. Drent