Does the oxygen radicals form in Type1 reaction cause the major degradation of the sensitizers?
These are the answers for the first question:
https://en.wikipedia.org/wiki/Photodegradation
https://en.wikipedia.org/wiki/Photobleaching
The second question is too general to be answered
Yurii V Geletii Thank you so much! It's an honor to be answered from a well known scientist like you. I am now focusing my studies on what extent those ROS contribute to the photobleaching in PDT. This is my start.
Photodegradation is meaning to broke the compound and produce CO2 and H2O in mineralization process
But photoblenching is meaning to broke the chromophor group and the dye is being without color....
photodegradation is the degradation of organic matter by radicals (OH-, O2.-....) and produce a lot of secondary product and sometimes produce co2 and h2o2 in the case of total mineralization
photoblenching is to degradate the fluorophore molecule
https://www.internationalphotodynamic.com/new-blog/2019/10/23/news-from-our-members-photosensitizer-degradation-is-
Luma M. Ahmed Karim Tanji
please, don't confuse the readers, We have to follow IUPAC recommendations in terminology, don't give your own definitions.
Photodegradation: The photochemical transformation of a molecule into lower
molecular weight fragments, usually in an oxidation process. This term is widely used in the destruction (oxidation) of pollutants by UV-based processes.
Source: PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2260
Photobleaching is not in the list of recommended definitions, but commonly is defined as " a loss of color when illuminated ." In general, I agree with you on this point,
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