Porphyrins XXV. Extended H�ckel calculations on location and spectral effects of free base protons

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Martin Gouterman · Journal of Molecular Spectroscopy · 1961 · 2.2K citations

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Michael C. Zerner, Martin Gouterman · Theoretical Chemistry Accounts · 1966 · 463 citations

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Optics and Spectroscopy

Nature · 1960 · 403 citations · Full text

Natural Sciences, Physics, Optics +7