Transcription of Spectroscopy vs spectrometry
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Spectroscopy vs spectrometry
Spectroscopy vs spectrometrySpectroscopy Latin specere to look at Greek skopia to see -metry Greek metria process of measuring Spectroscopy traditionally involves the absorption of some type of energy leading to an excited state that is subsequently emitted - This returns the molecule to the initial state non-destructively. Energy of excitation is just enough to promote a ground state to an excited state .. no more, no less because it is quantized Typical examples: UV-vis, fluorescence, IR, NMR Versus typically destructive techniques ( mass spec) or those that involve the scattering of radiation (X-ray crystallography) Spectroscopic methods: what are the goals?
Infrared (IR) - 1940s Functional groups, molecular fingerprints Raman spectroscopy 1960s Mass spectrometry (MS) - 1950s Molecular weights, and observation of key fragments Characteristic reactivity … molecular fingerprints Nuclear magnetic resonance (NMR) - 1960s Fourier Transform NMR 1970s 2-D correlation spectroscopies 1980s
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