Photochemical and Photobiological Reviews

Photochemical behavior and photobiological action of photosensitive drug Tolbutamide

Irradiation of sulfonamide derived oral antidiabetic drug, tolbutamide (N-[(butylamino) carbonyl]-4methylbenzenesulfonamide,1) in a phosphate buffered solution under aerobic atmosphere afforded two photoproducts by cleavage of S-N and C (O)-N bonds of urea units. When irradiated with linoleic acid it photoinduced lipid peroxidation. The insignificant decrease in lipid peroxidation test under ar...

Fine control on the photochemical and photobiological properties of Ru(II) arene complexes.

A series of six Ru(arene) complexes, [(η(6)-p-cymene)Ru(dpb)(py-R)](2+) (1-6, dpb = 2,3-bis(2-pyridyl)benzoquinoxaline, py-R = 4-substituted pyridine, R = N(CH3)2, NH2, OCH3, H, COOCH3 and NO2), were synthesized and their photochemical and photobiological properties were compared in detail. The electron push/pull character of the R groups has a significant impact on both ligand photodissociatio...

Photochemical & Photobiological Sciences Paper 2-hydroxyphenacyl Ester: a New Photoremovable Protecting Group † ‡

A 2-hydroxyphenacyl moiety absorbing below 370 nm is proposed as a new photoremovable protecting group for carboxylates and sulfonates. Laser flash photolysis and steady-state sensitization studies show that the leaving group is released from a short-lived triplet state. In addition, DFT-based quantum chemical calculations were performed to determine the key reaction steps. We found that triple...

Cyclic Photobiological Algal H2-production

Previous work from our laboratory demonstrated the feasibility of using sulfur-deprived algal cultures to photoproduce H2 continuously for 3-4 days (Melis et al., 2000; Ghirardi et al., 2000a). The production of H2 depends mostly on the photosynthetic H2O-oxidation activity of the cultures (Ghirardi et al., 2000 a and b; Kosourov et al., 2002), and requires concomitant operation of O2-consumpti...

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