Webpage Jan Reedijk and Consultancy Jan Reedijk, Leiden

This is the home page of Jan Reedijk, Leiden. Brief links to my business and science activities are given below, including illustrations of most of my scientific, technological and consultancy activities and interests.

Photograph of Jan Reedijk

Thanks for visiting my personal webpage. A few years before my scheduled retirement in 2009, I started my consultancy, one-man company (ZZP) activities, named Consultancy Jan Reedijk. Since then, I have been consulting for (bio)chemical/biomedical companies, research councils, the European Union (ERC) and Publishing houses. The links below will generate more detail.


I am available for Coordination Chemistry and Bioinorganic Scientific and legal consultancy matters, “Consultancy Jan Reedijk
(Chamber of Commerce, NL: 2818456) please contact me here. I am connected to ZZP Netherlands: 
More details and background of the consultancy website are found below.

My major professional academic activity link at Leiden University is here, i.e. directly linking to my former  office website before my formal retirement from Leiden University.

A brief CV is to be found here, or a detailed one at ORCID and Thomson Reuters.

Since 1979, I have worked  at Leiden University, Leiden Institute of Chemistry, Gorlaeus Laboraties, where I currently an Emeritus Professor of Chemistry. From 1973-1979 I lectured at Delft University of Technology. Between 1993 and 2015 I have also been active as visiting professor in a variety of Universities worldwide, including a sabbatical stay in Cambridge University, UK.  

After my formal retirement I have been increasingly active in consultancy, IUPAC activities, committee work and – more frequent than before – playing 2-3 times per week golf and also tennis.. From 2018-2020 I have been a co-chair of the Inter-Union Management Committee to celebrate the International Year of the Periodic Table 2019. See for details the separate page www.iypt2019.org

A current editor-in-chief activity on Major Reference Works I am performing with Elsevier is listed here.

One of my scientific interests deals  with the periodic table of chemical elements. Since my PhD I have published scientific papers dealing with 74 (of the 90 natural occurring) chemical elements, marked orange in the Table below. Yellow elements I did not study. Blue-colored elements are the radioactive elements I did not study.

My contact details are: Jan Reedijk, PO Box 9502, 2300 RA Leiden. The Netherlands.
Email contacts are: consultancy@jan-reedijk.nl and reedijk@chem.leidenuniv.nl

Welcome to Consultancy activities Jan Reedijk 
 I am available for consultancy to companies and governmental organisations, like research councils, on matters regarding metals and ligands, and their possible applications in medicine, catalysis, environment and molecular materials, and for science evaluations. My recent and earlier papers can be consulted at the website link given here. For activities related to the International Year of the Periodic Table and some scientific events, see below. My consultancy activities currently deal with several aspects of metal coordination by ligands, including molecular (magnetic) materials, homogeneous catalysis, green chemistry, metal applications in medicine and the environment, and also scientific research evaluations as well as consulting for publishing houses.
I am registered with the Chamber of Commerce, NL: 2818456

For my CV, click here.
My publication list is here.

Scientific, Legal and Technological Advice on Metals and Ligands
The field of coordination chemistry deals with (heavy) metals and their binding to (organic) molecules (called: Ligands).  This is illustrated also in the logo. When the ligands play a role in living systems, like proteins or nucleic acids, the field is called bioinorganic chemistry.

For  questions on matters of ligands and metals I can be consulted by email to consultancy@jan-reedijk.nl or via my office at Leiden University, email: reedijk@chem.leidenuniv.nl

Research information

In the field of Molecular Materials I have been giving attention to:
Molecular magnetic materials; Ion-exchange materials; catalytic materials; luminescent materials.

In the field of Catalysis I have been giving attention to Oxidation Catalysis with a focus on biomimetic systems based on Iron, Manganese and Copper.

In the interdisciplinary area dealing with Metals in Medicine, we have been largely focusing on Pt and Ru, and their binding to DNA and DNA fragments.

Heavy-Metal ions may bind at the DNA bases in the minor or major groove.


The international year of the Periodic Table 2019

The year 2019 has been the year for which UNITED NATIONS has decided to celebrate the Year as The International Year of the Periodic Table. The official website is at: www.iypt2019.org and has links to all major, reported worldwide activities.
The grand flagship opening has been celebrated in Paris on January 2019 at UNESCO headquarters. The live stream is still available at:
The Closing Ceremony was held in Tokyo, December 5 2019. Here is a 5 hr video of the closing ceremony: https://youtu.be/hFtpzeLMxMk