Photostability and the yield of triplet state generation of bacteriochlorophyll c and bacteriopheophytin c in solution.
The paper deals with some fast and slow processes of excitation energy deactivation in bacteriochlorophyll c and bacteriopheophytin c. The experiments were carried out in the air, and in oxygen or nitrogen atmosphere at different temperatures. The parameters such as fluorescence yield, the yield of triplet state generation and photostability were estimated. On the basis of these parameters an attempt was made to preliminary select the pigments best suited for medical applications. It seems that the photosensitive and highly fluorescent bacteriochlorophyll c could be used as a fluorescence probe for diagnosis, whereas its derivative without the magnesium ion is better suited for the photochemical reactions occurring during therapeutic treatment.
Staśkowiak
Ewa
E
Faculty of Technical Physics, Poznań University of Technology, Nieszawska 13A, 60965 Poznań, Poland.
Dudkowiak
Alina
A
D001426:Bacterial Proteins / Q000737:chemistry*; D001429:Bacteriochlorophylls / Q000737:chemistry*; D005453:Fluorescence; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D010674:Pheophytins / Q000737:chemistry*; D010777:Photochemistry; D012996:Solutions / Q000737:chemistry; D013696:Temperature
D001426:Bacterial Proteins; D001429:Bacteriochlorophylls; D010674:Pheophytins; D012996:Solutions; C006678:bacteriopheophytin; C002084:bacteriochlorophyll c; D009584:Nitrogen; D010100:Oxygen