Ernst Cohen

Ernst Julius Cohen ForMemRS[2] (7 March 1869 – 6 March 1944) was a Dutch Jewish chemist known for his work on the allotropy of metals. Cohen studied chemistry under Svante Arrhenius in Stockholm, Henri Moissan at Paris, and Jacobus van't Hoff at Amsterdam. In 1893 he became Van't Hoff's assistant and in 1902 he became professor of Physical Chemistry at the University of Utrecht, a position which he held until his retirement in 1939. Throughout his life, Cohen studied the allotropy of tin. Cohen's areas of research included polymorphism of both elements and compounds, photographic chemistry, electrochemistry, pizeochemistry, and the history of science. He published more than 400 papers and numerous books.[3]

Ernst Julius Cohen
Born7 March 1869
Amsterdam, Netherlands
Died6 March 1944 (1944-03-07) (aged 74)[1]
Auschwitz-Birkenau, German-occupied Poland
AwardsFellow of the Royal Society[2]
Scientific career
FieldsChemistry
Doctoral advisorJacobus Henricus van 't Hoff

In 1913 he became member of the Royal Netherlands Academy of Arts and Sciences. He was elected a Foreign Member of the Royal Society in 1926.[2] Following the 29 April 1942 decree that Dutch Jews wear the yellow badge, he was arrested by Nazi police for non-compliance[3] and forced to resign.[4]

According to Margit Szöllösi-Janze, in her book, Science in the Third Reich, Cohen "put great efforts into restoring the relationships of Western European scientists with their German colleagues after the First World War."[5] He was killed on 6 March 1944 in a gas chamber at Auschwitz concentration camp.[5]

Literary works
  • "J. H. van 't Hoff, his life and work", 1912
  • "Impressions of the Land of Benjamin Franklin", 1928

References
  1. Joodsmonument website
  2. Donnan, F. G. (1948). "Ernst Julius Cohen. 1869-1944". Obituary Notices of Fellows of the Royal Society. 5 (16): 666–687. doi:10.1098/rsbm.1948.0005. JSTOR 768764. S2CID 120406391.
  3. Moesveld, A. L. T. (1948). "The scientific work of Ernst Cohen". Journal of Chemical Education. 25 (6): 308–346. Bibcode:1948JChEd..25..308M. doi:10.1021/ed025p308.
  4. "Ernst Julius Cohen (1869 - 1944)". Royal Netherlands Academy of Arts and Sciences. Retrieved 26 July 2015.
  5. Szöllösi-Janze, Margit (2001). Science in the Third Reich. Berg Publishers. p. 255. ISBN 978-1-85973-421-6.
  • Weintraub, B. (2003). Tin Disease and Ernst Julius Cohen (1869-1944); Chemistry in Israel, Bull. Isr. Chem. Soc., Issue 9, Apr. 2002, p 31-32.


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