Quantum Mechanics and Artifical and Natural Spectroscopy (Berman et al.)

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Presentation transcript:

Quantum Mechanics and Artifical and Natural Spectroscopy (Berman et al.)

Quantum Mechanics and Artifical and Natural Spectroscopy (Berman et al.)

Quantum Mechanics and Artifical and Natural Spectroscopy (Berman et al.)

Quantum Mechanics and Artifical and Natural Spectroscopy (Berman et al.)

Molecules Responsible for Absorption of Light Chlorophyll characterized by a porphyrin ring and a hydrophobic tail which anchors the molecule to the membrane. The porphyrin ring is host to the electronic states that participate in the interaction with light.

Beer’s Law

The spectrophotometer permits the measurement of absorption as a function of the incident wavelength. Note that chlorophyll appears green because it absorbs strongly in the blue and the red. We will be interested in examining the quantum mechanical underpinnings of absorption spectra. Absorption Spectra of Biological Pigments

“Linear” Pigments: The Carotenoids