Johannes Jaenicke (chemist)

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Johannes Jaenicke (born April 5, 1888 in Guben , † 1984 ) was a German chemist; he was a close colleague of Fritz Haber .

Live and act

Johannes Jaenicke was born in Guben in 1888 as the son of a businessman and bankruptcy administrator . He studied archeology , philosophy and art history , but then turned under the influence of Arthur Rosenheim of chemistry to. In his first scientific work and his doctoral thesis, he dealt with heteropoly acids .

After being wounded in the First World War , he ended up at the Kaiser Wilhelm Institute in Berlin in 1916 . There he initially worked in the development department for gas protection issues. Some time later Fritz Haber became aware of him, and Jaenicke began researching with Haber in the field of gold extraction from seawater. Jaenicke, who had a close personal friendship with Haber, headed the M working group dedicated to this task . Among other things, Jaenicke developed the necessary analysis procedures; his contribution in this area was rated as very important by the Nobel Prize winner Richard Willstätter .

In 1926 Jaenicke took up a position at the metal company in Frankfurt am Main , but remained an external member of the Kaiser Wilhelm Institute. His tasks at Metallgesellschaft included setting up an industrial plant for zinc electrolysis and rubber processing . Jaenicke is the inventor of numerous of the company's patents.

After the seizure of power in 1933, Jaenicke, who was hostile to National Socialism, had to accept significant adverse effects in his career. During the Second World War he was transferred to supervise a zinc smelter in Odda in Germany-occupied Norway .

In autumn 1945 he returned to Germany and resumed his work for the metal company. There he initially headed the literary department and then became head of the company's scientific laboratories. He held this position until his retirement in 1958.

After his retirement, he worked on a biography of Fritz Haber, which he had been asked to do by family members and former colleagues in the early 1950s. He put together extensive material; however, the final work was not created. The collection of documents is now part of the archive of the Max Planck Society . Jaenicke and his wife Erna wrote the 1966 article on Fritz Haber in the Neue Deutsche Biographie .

family

Jaenicke was with Erna, geb. Buttermilch (1895–1961), married. The couple had four children, including the physical chemist Walther Jaenicke (1921-2010), the biochemist Lothar Jaenicke (1923-2015) and the biophysico-chemist Rainer Jaenicke (1930-2016). The actor Hannes Jaenicke is a grandson of Johannes Jaenicke.

Honors and memberships

Jaenicke was from 1922 to 1984 a member of the Bunsen Society and there from 1953 to 1956 and from 1960 to 1963 a member of the Society's Standing Committee. He was also a long-time member of the Society of German Chemists , the German Chemical Society and the Association of German Chemists .

Publications (selection)

  1. ↑ Arthur Rosenheim, Johannes Jaenicke: About the hydrates of some heteropoly acids. (To the knowledge of the iso- and heteropolyacids. VI. Communication.) . In: Journal of Inorganic Chemistry . tape 77 , no. 1 , September 10, 1912, p. 239-251 , doi : 10.1002 / zaac.19120770117 .
  2. ↑ Johannes Jaenicke: Critical studies on the constitution of the heteropoly acids . Berlin 1917 (dissertation).
  3. ^ F. Haber, J. Jaenicke: Contribution to the knowledge of the Rhine water . In: Journal of Inorganic and General Chemistry . tape 147 , no. 1 , August 17, 1925, p. 156-170 , doi : 10.1002 / zaac.19251470116 .
  4. ^ F. Haber, J. Jaenicke, F. Matthias: About the alleged representation of "artificial" gold from mercury . In: Reports of the German Chemical Society . tape 59 , no. 7 , July 7, 1926, p. 1641-1648 , doi : 10.1002 / cber.19260590743 .
  5. ↑ Johannes Jaenicke: Haber's research on gold deposits in seawater . In: Natural Sciences . tape 23 , no. 4 , January 1, 1935, p. 57-63 , doi : 10.1007 / BF01497020 .
  6. ↑ Erna Jaenicke, Johannes Jaenicke: Haber, Fritz Jacob . In: New German Biography (NDB). tape 7 . Duncker & Humblot, Berlin 1966, ISBN 3-428-00188-5 , pp. 386-389 .

literature

Web links

Individual evidence

  1. ↑ a b c d e f g Helmut Witte : Dr. Phil. Johannes Jaenicke on his 75th birthday . In: Reports of the Bunsen Society for Physical Chemistry . tape  67 , no. 2 , March 1963, p. 138-139 , doi : 10.1002 / bbpc.19630670203 .
  2. ^ Margit Szöllösi-Janze : Fritz Haber, 1868–1934: a biography . CH Beck, 1998, ISBN 3-406-43548-3 , pp.  512 ( limited preview in Google Book Search).
  3. ↑ List of German-language patents with Johannes Jaenicke as the inventor. Google patent search, accessed October 8, 2017.
  4. ↑ George B. Kauffman : Two Jewish Chemists: A Sinner and a Saint? Book review. In: Chemical & Engineering News . Volume 82, Issue 21. American Chemical Society , May 24, 2004, pp.  54-55 (English, acs.org ).
  5. ↑ Eckart Henning: The "Haber Collection" in the archive for the history of the Max Planck Society in Berlin , in: Reports on the history of science 13 (1): 34-37 (1990)
  6. ↑ Prof. Dr. Walther Jaenicke. Obituary. University of Erlangen , accessed October 8, 2017 .
  7. ↑ Helmut Sies : Obituary for Lothar Jaenicke. North Rhine-Westphalian Academy of Sciences and Arts , March 16, 2016, accessed on October 8, 2017 .
  8. ↑ Michael Groß : A Fond Farewell. In: goodreads.com. September 7, 2016, accessed October 8, 2017 .
  9. ^ Helmut Maier : Chemists in the "Third Reich": The German Chemical Society and the Association of German Chemists in the Nazi regime . Wiley-VCH, Weinheim 2015, ISBN 978-3-527-33846-7 , pp.  148 ( limited preview in the Google book search - footnote no. 125: Short biography Johannes Jaenicke).
personal data
SURNAME Jaenicke, Johannes
BRIEF DESCRIPTION German chemist
DATE OF BIRTH April 5, 1888
PLACE OF BIRTH Guben
DATE OF DEATH 1984