1.2 Light Absorption and energy conversion 1.2. 1 Light is absorbed by pigment molecules Pigment→ Pigment
1.2 Light Absorption and energy conversion. 1.2.1 Light is absorbed by pigment molecules. Pigment→Pigment*
=- Blue 2nd excited singlet state Energy Absorption ------ Red 1st excited singlet state Fluorescence ===== Ground state
number of products formed photochemically Equation 1.2.1: Ouantum Yield q= Number of quanta absorbed
number of productsformed photochemically Equation 1.2.1:QuantumYield Ф= ------------------------------------------------------- Number of quanta absorbed
1.2.2 Almost all photosynthetic organisms contain chlorophyll or a related pigment CHs HaC C?Hs HaC COOCH COOCH3 Ou CH2)3 cH2)3 cH2)3 HG一cH3 cH2)3 CH Bacteriochlorophyll a
1.2.2 Almost all photosynthetic organisms contain chlorophyll or a related pigment
Plants, Algae and Cyanobacteria: chlorophyll a or chlorophyll b Anaerobic photosynthetic bacteria: bacteriochlorophyll a Chlorophylls have a porphyrin ring structure that contains a central Mg atom coordinated to the four modified pyrrole rIngs Chlorophyll molecules also contain a long hydrocarbon tail that makes the molecules hydrophobic Various chlorophylls differ in their substituents around the ring structure
Plants, Algae and Cyanobacteria: chlorophyll a or chlorophyll b. Anaerobic photosynthetic bacteria: bacteriochlorophyll a. Chlorophylls have a porphyrin ring structure that contains a central Mg atom coordinated to the four modified pyrrole rings. Chlorophyll molecules also contain a long hydrocarbon tail that makes the molecules hydrophobic. Various chlorophylls differ in their substituents around the ring structure