Biology 1201A Lecture Notes - Lecture 2: Electron Acceptor, Electromagnetic Spectrum, Membrane Protein
14 Mar 2016
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Document Summary
Relationship between excited states of a pigment and its absorption, fluorescence emission spectra. Region of the electromagnetic spectrum known as visible light . Relationship between wavelength and energy content of a photon: The longer the wavelength, the less the energy. Molecular characteristic of visible pigments that make them able to absorb light. Pigments arent free, they are attached to proteins. Whether chlorophyllic photosynthesis or retinal in your eye, these pigments are not free, but are specifically bound to proteins. Four fates of the excited state of chlorophyll resulting from absorption of photons: Fluorescence: even in the lower excited state, can still loose a little e as heat. Then, can loose the remaining energy as flourescence. Flourescence emission is of a longer wavelength than the light initially absorbed, and has less e b/c some was lost as heat. Use the light to change the structure of a pigment.
