§10.6 Photochemistry 6.3 Photochemistry (1)The first law of photochemistry Light must be absorbed by a chemical substance in order to initiate a photochemical reaction Grotthuss and draper, 1818:
6.3 Photochemistry (1) The first law of photochemistry: Grotthuss and Draper, 1818: Light must be absorbed by a chemical substance in order to initiate a photochemical reaction. §10. 6 Photochemistry
§10.6 Photochemistry 6.3 Photochemistry (2) The second law of photochemistry /The law of photochemical equivalence One quantum of radiation absorbed by a molecule activates one molecule in the primary step of photochemical process. E=hy≥印F u=Lhy=0.1196 vJ mol- Einstein and Stark. 1912 one einstein
(2) The second law of photochemistry / The law of photochemical equivalence One quantum of radiation absorbed by a molecule activates one molecule in the primary step of photochemical process. Einstein and Stark, 1912 6.3 Photochemistry = Lh = 0.1196 J mol-1 one einstein E = h F-F §10. 6 Photochemistry