Oswaldo Sala, Brazilian spectroscopist (Bauru, São Paulo State 29 June 1926 – São Paulo 07 December 2021)

From Brazilian father and Italian mother

Brother of physicist Oscar Sala

With H. Stammreich et al. authored classical works in the field of Raman spectroscopy

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

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

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

A paper with more than 100 citations

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

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

With H. Stammreich, K. Kawai & 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 H. Stammreich, K. Kawai & 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 

Showed that the intensities of the Raman bands depended on their position within electronic absorption band and that the intensity of overtones only decreases monotonically with the vibrational quantum number when the frequency of scattered radiation of the overtones is lower than that of the maximum of the excitation profile

With M.L. Temperini. Resonance Raman effect of solid Copper thiophosphate. Chem. Phys. Lett. 36:652, 1975

Observed many important features for understanding SERS effect

Imagined a new representation of SERS enhancement emphasizing the modulation of vibrational mode in SERS effect

With M.L.A. Temperini & W.J. Barreto. The dependence of SERS on the vibrational mode, exciting radiation and applied potential. Chem. Phys. Lett. 99(2):148-52, 1983

Introduced a number of valuable contributions about resonant Raman effect

With S. Isotani. A relation between bending and interaction force constants with the ionic character. An. Acad. Bras. Cien. 45:349, 1973  

Methods

With J. Rubim & I. Gutz. Cyclic-fluorovoltammetry as a technical tool in the study of passivating films generated on electrode surfaces. J. Electroanal. Chem. Interf. Electrochem. 190(1-2):55-63, 1985

With K. Araki & L. Noda. A procedure to obtain the effective nuclear charge from the atomic spectrum of sodium. J. Chem. Educ. 76(9):1269, 1999

With A.M. Pereira Neto. The effect of temperature and LiClO₄ in the water structure: a Raman spectroscopic study. Braz. J. Physics 34(1):137-41, 2004

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