Hans Stammreich, German-born Brazilian spectroscopist (Remscheid, Dusseldorf, Nordrhein-Westfalen 16 July 1902 – São Paulo 06 March 1969)

Authored 86 papers with classical works in molecular Raman spectroscopy

ACHIEVEMENTS

With Adolf Miethe (1924) and independent from H. Nagaoka (1925) discovered transmutation of mercury to gold 

Obtained the first Raman spectra of a number of materials

Proposed using yellow and red helium lamp radiation as a Raman excitation source

With R. Forneris made the first use of extreme-red excitation for Raman analysis (1961)

With R. Forneris obtained the first Raman spectrum and the calculation of force constants for plane configuration molecules

With O. Sala introduced large contribution to Raman scattering studies of metals (1958-61)

With O. Sala & R. Forneris presented reported studies of metallocarbonyls, cyano complexes, halogen complexes and interhalogen compounds 

First reported stowing force constants of M-C and C-O with retrodonation and conjugative interactions 

First to obtain and interpret the Raman spectra of metal carbonyls

Performed the first studies in elucidating the structure of metal-carbonyl employing Raman spectroscopy and first to demonstrate the existence of metal-metal bonds in metal-carbonyl compounds

With O. Sala & Y. Tavares. Raman spectra of metal carbonyl compounds. I. Raman spectrum and structure of iron-pentacarbonyl. J. Chem. Phys. 39:856, 1959

With K. Kawai, Y. Tavares, P. Krumholz, J.Behmoiras & E. Bril. Raman spectra of metal carbonyl compounds. II. Raman spectra, structure and force constants of cobalt and iron tetracarbonylate anions. J. Chem. Phys. 32:1482, 1960

With K. Kawai, O. Sala & P. Krumholz. Raman spectra of metal carbonyl compounds. III. Raman spectrum vibrational analysis and bond structure in nickel tetracarbonyl. J. Chem. Phys. 35:2168, 1961 

With K. Kawai, O. Sala & P. Krumholz. Raman spectra of metal carbonyl compounds. IV. Raman spectra and structure of cadmium and mercury cobalt carbonyl. J. Chem. Phys. 35:2175, 1961  

Presented one of first works about resonant Raman effect

First to observe harmonics in Raman spectra of diatomic molecules

The Raman spectrum of bromine. Phys. Rev. 78:78, 1950  

Concluded that the main effect of intermolecular forces on the vibrational frequency of diatomic molecules is due to their polarizability

With R. Forneris & Y. Tavares. High-resolution Raman spectroscopy. II. Vibrational frequencies and molecular interactions of halogens and diatomic interhalogens. Spectrochim. Acta 17:1173, 1961

First to report the Raman and infrared spectra of CI₄

With Y. Tavares & D. Bassi. The vibrational spectrum and force constants of carbon tetraiodide. Spectrochim. Acta 17(6):661-4, 1961

First to use long wavelength excitation of Raman spectra

Le Spectroscopia Raman a undas longe. Spectrosc. Mol. 5:19, 1956

Long wave excitation of Raman spectra. Pure Appl. Chem 4:97, 1962

Obtained the first vibrational spectrum of a planar X₂Y₆ molecule to be reported

With Y. Kawano. The Raman spectrum of solid iodine trichloride. Spectrochim. Acta Part A: Molec. Spectrosc. 24(7):899-904, 1968

Described a high speed grating spectrograph

With R. Forneris. High resolution Raman spectroscopy in the red and near infra-red. I. Vibrational Raman spectrum of natural liquid chlorine. Spectrochim. Acta 17(8):775-84, 1961 

A paper with more than 100 citations

With D. Bassi, O. Sala & H. Siebert. The vibrational spectrum of the dichromate ion. Spectrochim. Acta 13(3):192-6, 1958

METHODS, INVENTIONS & PATENTS

A Raman excitation technique using helium vapour lamps (with Oswaldo Sala)

A method for obtaining Raman spectra of high-coloured substances

Developed and patented a new method of production of electric discharge lamps in metal vapours

Process to manufacture of transparent and semitransparent papers for foods maintenance

A method to measure the motion of small animals (with G. Ayrosa e A.G. Pavan)

Introduced the use of spectrographs based on diffraction gratings into Raman instrumentation (1956) 

With O. Sala, R. Forneris & A.G. Ayrosa developed the technique of the excitation of Raman spectra with helium lamps in Technique and results of excitation of Raman spectra in the red and near infrared region. Spectrochim. Acta 8:41-45, 1956

With O. Sala & R. Forneris developed narrow bandpass filters that resulted in the ability to obtain superb Raman spectra of solid or turbid solutions

With O. Sala & R. Forneris introduced the use of rubidium vapor lamp with strong resonance  for obtaining spectra of Cl₄ and many other species 

A helium discharge lamp of long duration  

Metal iodides lamps

High-luminosity spectrographs with high-efficiency diffraction gratings in red region

Dispositif for manufacture of vitamin D

Device for measuring and recording sedimentation rates of blood globules

Microcolorimeter for medical purposes

Device to discriminate natural pearls from developed ones with x-rays aid  

A special paper to record electrical impulses 

Special electrodes for iontophoresis and preventive treatment of burns caused by war fumes 

Developed a new type of anionic emission cathode used in fluorescente lamps

Built Mercury vapor valves used in echo sounders and an electric impulse Recording paper for echo sounders

With A. Miethe. Improvements in or relating to the extraction of precious metals. German Patent Specification #233,715 (8 May 1924)

Metal arc lamp (1928) US 1885637

With R. Wasicky & A. Giuliani described a new apparatus for the electrical recording of locomotion movements in laboratory animals in An. Fac. Farm. Odont. Univ. S. Paulo 8:187, 1950

With R. Wasicky. Um dispositivo para medição e registro da excitação do sistema nervoso dos animais. An. Fac. Farm. Odont. Univ. S. Paulo (1951)

BIBLIOGRAPHY

Ciência e Cultura 21(4):785-94, 1969  (in Portuguese; with complete bibliography)