Emeriti - Former Professors
In the middle of the 20th century, inorganic chemistry in Bonn had gained new importance with the possibilities of X-ray physics and Alfred Werner's coordination chemistry, which his student Paul Pfeiffer brought with him to Bonn. Thus, in 1960, inorganic chemistry received its own institute within the chemistry building in Meckenheimer Allee. The following is a chronological overview of the professors of the Institute of Inorganic Chemistry.
![Otto Schmitz-DuMont](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/schmitz_dumont_otto.jpg/@@images/image)
Otto Schmitz-Du Mont
(1899–1982)
First director of the Institute of Inorganic Chemistry in 1960
Active until 1964
![Ernst Kordes](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/kordes_ernst.png/@@images/image)
Ernst Kordes
(1900–1976)
Research on ceramics and glasses
Active from 1953 to 1968
![Rolf Appel](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/appel.jpg/@@images/image)
Rolf Appel
(1921–2012)
Molecular chemistry of phosphorus
Active from 1962 to 1986
![Günter Bergerhoff](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/bergerhoff_guenter.jpg/@@images/image)
Günter Bergerhoff
(*1926)
Single crystal investigations for structure elucidation
Active from 1963 to 1991
![Heinrich Puff](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/puff_heinrich.jpg/@@images/image)
Heinrich Puff
(1921-2017)
Active from 1964 to 1986
![Bernd Ross](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/ross_bernd.png/@@images/image)
Bernd Ross
(*1938)
Reactions in liquid ammonia
Active from 1972 to 2003
![Dieter Hänssgen](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/haenssgen_dieter.png/@@images/image)
Dieter Hänssgen
(1936-2023)
Reactions in liquid ammonia
Active from 1975 to 2001
![Edgar Niecke](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/niecke_edgar.jpg/@@images/image)
Edgar Niecke
(1939-2023)
Chemistry of phosphorus-containing inorganic molecules.
Active from 1986 to 2004
![Martin Jansen](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/jansen_martin.png/@@images/image)
Martin Jansen
(*1944)
Inorganic solid state chemistry
Active from 1987 to 1997
![Bernd Harbrecht](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/harbrecht_bernd.jpg/@@images/image)
Bernd Harbrecht
(*1950)
Multinary chalcogenides, intermetallic compounds
Active from 1991 to 1995
![Werner Mader](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/mader.jpg/@@images/image)
Werner Mader
(*1949)
Materials science, electron microscopy
Active from 1993 to 2015
![Harald Hillebrecht](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/hillebrecht_harald.jpg/@@images/image)
Harald Hillebrecht
(*1960)
Borides and other hard materials
Active from 1997 to 2000
![J. Beck](https://www.chemie.uni-bonn.de/ac/de/medienorder-ac/jbeck_portrait-juli16.jpg/@@images/image)
Johannes Beck
(*1956)
Polycations, polyanions, solvothermal synthesis, structure determination
Active from 1999 to 2023