Paul Friedlaender (chemist)
Paul Friedlaender (also: Friedländer , born August 29, 1857 in Königsberg , † September 4, 1923 in Darmstadt ) was a German chemist.
His father was the professor of classical philology and cultural historian Ludwig Friedländer , his mother Laura Gutzeit. Paul Friedlaender was also to become a historian at first, but through Carl Graebe , a friend of the family, he studied chemistry at the Universities of Königsberg , Strasbourg and Munich, where in 1878 he became Adolf von Baeyer's assistant . Here he also met Emil Fischer .
In 1879 Baeyer offered him the opportunity to do his habilitation and to clarify mechanistic problems of understanding the indigo synthesis. An important collaborator for this was Friedlaender's doctoral student Arthur von Weinberg . The chemistry of indigo and its derivatives became a life's work for Friedlaender.
In 1882 he discovered the Friedlaender quinoline synthesis named after him . In 1883 he completed his habilitation at the University of Munich with a thesis "On the internal anhydrides of o-amino-cinnamic acid and o-amino-hydrocinnamic acid" .
In 1884 he became head of the scientific laboratory at the K. Oehler tar paint plant in Offenbach. Here he began his work "The Advances in Tar Dye Manufacture and Related Industries". In 1889 he became a professor at the University of Karlsruhe, where he dealt with the problems of naphthalene chemistry.
In 1895 he moved to the Technological Trade Museum in Vienna, where he again devoted himself to indigo chemistry. In 1904 he came up with the idea of thioindigo synthesis while working on the elucidation of the constitution of sulfur dyes . In 1908 he dealt with the synthesis of all shades (except yellow) of indigoid compounds. In 1909 he succeeded in isolating 1.4 g of purple from so-called purple snails ( Murex brandaris ), which he identified as 6,6'-dibromoindigo. After his retirement in 1911, he continued his research in the field of indigochemistry in Darmstadt.
He was a professor at the Technical University of Karlsruhe, the Technological Trade Museum (TGM) Vienna and the Technical University of Darmstadt and was particularly active in the field of dyes. He discovered thioindigo , for which he received the Ignaz Lieben Prize in 1908 .
Here is the overview of the Friedlander quinoline synthesis named after him:
In 1911 he was the first to be awarded the Adolf von Baeyer Memorial Medal. As chairman of the DChG, Fritz Haber wrote his obituary after Friedlaender's death, in which he alleged that Friedlaender had been unworldly and thus robbed himself of the worldly fame he deserved.
" " But because he was full of the child's belief throughout his life that impersonal objectivity, which does not make much of himself or his own achievement, fill all people with the same strength as him, he missed the successes, the cosmopolitan nature on the outside Achieve life. " "
Nevertheless, Haber valued him highly as an employee at the KWI for Physical Chemistry and Electrochemistry from 1916 to 1920. Here he mediated between the scientific processing of gas warfare agents and issues relating to their technical production.
In the post-war period he moved to Darmstadt and served as a consultant at the TH there as well as at the friendly companies Kalle in Biebrich and Cassella in Fechenheim. His close friendship with Arthur von Weinberg connected him to Cassella in particular .
Advances in tar paint manufacturing and related industries
Paul Friedlaender began this encyclopedia when the Imperial Patent Office was founded in Berlin in 1877. By 1941 it created a valuable comparative overview of all German chemical patents in 25 volumes. These are usually listed there in the original text. Twelve of the first 13 volumes can only be researched online via a US proxy connection.
- Volume I, 1877-1887, published 1888, University of Michigan
- Volume II, 1887-1890, published 1891, University of Michigan
- Volume III, 1890-1894, published 1896, University of Michigan
- Volume IV, 1894-1897, published 1899, University of Michigan
- Volume V, 1897-1900, published 1901, University of Michigan
- Volume VI, 1900-1902, published 1904, University of Michigan
- Volume VII, 1902-1904, published 1905, University of Michigan , 1905, Internet Archive
- Volume VIII, 1905-1907, published 1908, University of Michigan
- Volume IX, 1908-1910, published 1911, Ohio State University
- Volume X, 1910-1912, published 1913, Ohio State University
- Volume XI, 1912-1914, published 1915, Ohio State University
- Volume XII, 1914-1916, published 1917, University of California
- Volume XIII, 1916-1921, published 1923, University of Michigan
Web links
- Literature by and about Paul Friedlaender in the catalog of the German National Library
- CV of "Friedlaender, Paul" at the Austrian Academy of Sciences (ÖBL)
- Paul Friedlaender: Progress in tar paint production and related branches of industry: On the basis of the systematically ordered and critical annotations of the German Reich patents , Julius Springer, Berlin (25 volumes up to 1941), DNB 560487193 .
Individual evidence
- ↑ a b c d e W. R. Pötsch, A. Fischer, W. Müller, H. Cassebaum: Lexicon of important chemists . VEB Bibliographisches Institut, Leipzig 1989 , pp. 157–158, ISBN 3-323-00185-0 .
- ↑ a b Paul Friedländer and the secret of ancient Purpus . (PDF; 91 kB) Accessed June 19, 2013 .
- ↑ Meeting of October 15, 1923. In: Reports of the German Chemical Society (A and B Series). 56, 1923, pp. A81-A86, doi : 10.1002 / cber.19230561027 .
- ↑ Especially with old patents it is evident that the data stocks at the patent offices are very sketchy.
| personal data | |
|---|---|
| SURNAME | Friedlaender, Paul |
| BRIEF DESCRIPTION | German chemist |
| DATE OF BIRTH | August 29, 1857 |
| PLACE OF BIRTH | Koenigsberg |
| DATE OF DEATH | September 4, 1923 |
| Place of death | Darmstadt |