Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1989-12-21
1992-06-09
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415761, C07D48722, C07F 500
Patent
active
051204118
ABSTRACT:
The present invention includes a method to produce singlet oxygen from molecular oxygen generated by reaction with a sapphyrin compound excited at an absorbing wavelength to form a triplet species. Specifically, the sapphyrin compound is an alkylated sapphyrin, most preferably diprotonated 3,8,12,13,17,22-hexaethyl-2,7,18,23-tetramethylsapphyrin. Generation of the triplet species may be accomplished in an organic solvent, of which the most preferable solvents are chloroform, methanol or acetonitrile.
Also encompassed within the present invention is a method to selectively produce singlet oxygen in an aqueous environment. A sapphyrin compound is incorporated within a membranous vesicle, the vesicle is illuminated with exciting light and the resultant excited triplet state sapphyrin compound reacts with molecular oxygen to produce singlet oxygen. Singlet oxygen was not generated external to the vesicle where the sapphyrin compound is present in an aqueous medium.
REFERENCES:
patent: 4883790 (1989-11-01), Levy et al.
patent: 4915683 (1990-05-01), Sieber
patent: 4935498 (1990-06-01), Sessler et al.
PCT Search Report, mailed 2 Aug. 1990.
Harriman et al., J. Chem. Soc., Chem. Commun., (1989) 314-316.
Sessler et al., Chem. Absts., vol. 111:125716e (2 Oct. 1989).
Sessler et al., J. Amer. Chem. Soc., 110(16):5586-5588 (1988).
Harriman Anthony
Maiya Bhaskar G.
Sessler Jonathan L.
Board of Regents , The University of Texas System
McAndrews Isabelle R.
Niebling John F.
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