The research described in this thesis focused on the preparation of S/N functionalized carbene ligands and their transition metal complexes, and the exploration of their application as electrocatalysts for proton reduction.

In a newly published book chapter, Transparency and information: Factors needed to promote ethical investments, ELS lab member Sarah Vandenbroucke discusses why information and transparency are needed to promote ethical investments.

This thesis has described novel synthetic methods to produce a variety of (glyco)peptides and their application in the study of various immunological processes.

A dense region of a gaseous and dusty cloud collapses to form a protostar surrounded by a disk and an envelope. This thesis uses both observations and models to study physical and chemical conditions of these protostellar systems which are likely where planets start to form.

How do you gain access to insurance? With whom are you willing to share the risk? And when does an insurance policy pay out? These and other moral questions are what Erik Bähre, an anthropologist at Leiden University, and his research group study.

Carbohydrates, or sugars, are the most diverse and most abundant biomolecules known. However, the isolation of carbohydrate samples in sufficient amounts and purity is often impractical or even impossible, so the chemical synthesis of glycosides becomes relevant. The glycosylation reaction, in which…

The aim of this research was to develop an effective, generative, and practical approach to enhance students’ structure-property reasoning (SPR).

In 2007, a spy from the Dutch General Intelligence and Security Service (AIVD) planted a destructive computer virus at an Iranian nuclear site, halting the Iranian nuclear weapons programme. Dutch newspaper ‘de Volkskrant’ has revealed that the AIVD kept the crucial role of the Dutch spy a secret from…

How can we understand the material instability of photographic (mixed media) artworks (1960s - present) from an integrated approach of Art History, Conservation Science and Chemistry in order to preserve these works for the future?

Two excellent young chemists, Jeroen Codée and Sander van Kasteren, have received an ECHO grant for €260,000 from the Netherlands Organisation for Scientific Research (NWO). This funding will allow them to begin their research projects.

To cover up their deportation plans which targeted Polish Jews in the Warsaw Ghetto, the Nazis re-opened schools. In her inaugural lecture, historian Sarah Cramsey demonstrates with examples how care was used ‘as a weapon’ during the Holocaust. She also stresses that care is a unifying cement in society…

When do you submit a thesis proposal to the Ethics Committee? And how do you ensure that students save their data properly? On 9 June, thesis supervisors will be able to ask these questions at the Ethics Education Afternoon. Professor Herman Paul and policy officer Marcel Belderbos will tell us more…

The inverse electron demand Diels-Alder (IEDDA) pyridazine elimination emerged in 2013 as a new bioorthogonal reaction and constitutes a prime example of what is now known as dissociative bioorthogonal chemistry. The research described in this Thesis aims to develop synthetic strategies which enable…

With defending his thesis ‘Applications of topology to Weyl semimetals and quantum computing’, the Leiden theoretical physicist Tom O'Brien has gained the rare 'cum laude' qualification. The freshly minted PhD has started a five year research programme on quantum algorithms for quantum chemistry, funded…

For many years, human rights have mostly been a theme where states constituted the most important actors. Influenced by globalisation and the worldwide integration of the economy, multinational corporations have grown to feel more responsible for compliance to human rights.

Point of departure of this meditation on the ethical role of sounds and silences within Christian rites and other religious practices is the documentary Into Great Silence. It is an intimate portrayal of the everyday lives of Carthusian monks of the Grande Chartreuse, a monastery high in the French…

Is it ethical to freely redistribute photographs taken in colonial contexts, historically and today? Christoph Rippe, PhD-candidate Cultural Anthropology, suggests that people might not have been always fully aware of what happened to their photographs after they were taken. 'But nowadays, with the…

Missiles that travel at approximately six thousand kilometres per hour, up to 5 or 6 times the speed of sound. Has Russia used those against Ukraine and how is that possible? In Leiden University’s Dutch video series ‘De Werkplaats’, Danny Pronk, political scientist, security expert, and researcher…

Sander van Kasteren (Professor of Molecular Immunology) makes the invisible visible. He will explain more in his inaugural lecture.

Shell cooperates with theoretical physicists and chemists of Leiden University to research how quantum computer algorithms can help simulate complex molecules.

An international team of laboratory astrophysicists and astrochemical modellers has shown that glycine, the simplest amino acid and an important building block of life, can form under the harsh conditions that govern chemistry in space. The results have been published this week in Nature Astronomy and…

The challenge is considerable, but so is the satisfaction when it succeeds: creating complex sugar molecules that play a role in biology.

Op vrijdag 4 april 2025 organiseert de werkgroep Stedengeschiedenis een bijeenkomst bij de Rijksdienst voor het Cultureel Erfgoed onder de titel ‘Archeologie en de stad’. De studiedag is gratis en voor iedereen toegankelijk.

This Thesis describes the synthesis of D-alanylated ribitol-based wall teichoic acids from S. aureus to probe their interaction with immune-binding partners.

From March 11th to 14th, the workshop

To check whether the classroom scanners are secure, a ‘pen test’ was performed in the Lipsius building on Monday 28 March. This involved switching on the person counters for a day so that ethical hackers could try to gain access to the system.

Because of the recently published essay: Integrity 2025, written by Zeger van der Wal, Professor by special appointment Ien Dales Chair at the Institute of Public Administration at Leiden University, he was interviewed on 21 February by the magazine Binnenlands Bestuur (National Board) about diversity…

Since February 1st, 2017 Célia Fonseca Guerra is appointed as professor at the LIC with a chair in applied theoretical chemistry. She will be a member of the Theoretical Chemistry group. Her research interests are related to bioinorganic chemistry and catalysis and her appointment at the LIC will strengthen…

The aim of this thesis is to study cell-cell interactions and the development of an assay to explore and quantify the exchange of membrane compounds.

Supramolecular polymers are class of materials that are formed by non-covalent interactions such as hydrogen bonding, π-π interactions, electrostatic interactions and the hydrophobic effect.

Promotor: Prof.dr. E. Bouwman

This thesis studies theoretical surface chemistry within the field of heterogeneous catalysis.

On Wednesday 7 June 2023, Dr Yvonne Erkens, Kate Verhoeff, Emma Snel, and Fleur Walravens of the Department of Labour Law in Leiden, gave a presentation on The Database of Business Ethics for the Oxford Business and Human Rights Network (OxBHR) at the University of Oxford.

Professor Hermen Overkleeft has received the esteemed Roy L. Whistler International Award in Carbohydrate Chemistry for 2024 by the International Carbohydrate Organization. The award recognises Overkleeft’s outstanding contributions to the field of carbohydrate chemistry and biochemistry.

Nathaniel Martin has been appointed professor in the field of Bioorganic Chemistry within the Faculty of Science at the Institute of Biology Leiden, starting from 1 March 2018. His research focuses on using new (bio)chemical approaches to combat infectious disease, as well as on developing new molecular…

Researchers at eLaw contribute to groundbreaking volume on AI in radiology, offering legal and ethical frameworks, governance models, and solutions for responsible clinical integration.

As of July 1, Professor of Bio-organic Synthesis Hermen Overkleeft will be appointed as the Scientific Director of the Leiden Institute of Chemistry (LIC). He will succeed Jaap Brouwer, who has been managing the institute for the past twelve years. Overkleeft has been appointed for a period of four…

Andreas Bender, Assistant Professor for Medicinal Chemistry in the Medicinal Chemistry Division of the Leiden / Amsterdam Center for Drug Research, received the

Leiden chemist Roxanne Kieltyka is part of the 2018 Talented 12 list of the American Chemical Society. That was announced by the journal Chemical & Engineering News on 19 August.

The Chemistry and LST master’s programmes are both structured on an individual basis and well-embedded in the research at the faculty. Those are the main conclusions of the oral report at the end of the visit of the visitation panel on October 10th.

How do fats and enzymes in the brain contribute to multiple sclerosis? In his PhD research, Daan van der Vliet combined chemistry and neuroscience to gain new insights into how brain disorders develop.

During the 20th anniversary meeting of the Netherlands' Catalysis and Chemistry Conference, Marc Koper received the Netherlands Catalysis and Chemistry Award. ‘The ultimate candidate for the prize’, it says in one of the recommendation letters.

With Sylvestre Bonnet, Jeroen Codée and Remus Dame, the Leiden Institute of Chemistry (LIC) will be getting no less than three new professors. Bonnet will become professor in Bioinorganic Chemistry, Codée professor in Organic Chemistry and Dame professor in Molecular and Cellular Biochemistry.

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).

Rapid developments in DNA techniques allow researchers to find out more and more about human genetics. An international group of scientists has drawn up five ethical guidelines to ensure that this DNA research is better regulated. Leiden archaeologist Marie Soressi – one of the signatories - explains…