Biomaterial Database

[Photosensitized luminescence of singlet oxygen in solution]. 1976

A A Krasnovskiĭ

The Photoinduced afterglow of singlet oxygen was found in air saturated solutions of protoporphyrin and naphtacene in carbon tetrachloride. The excitation spectra coincide with the absorption spectra of the pigments. The lifetime is near to 7 msec, the quantum yield--to 3-10(-5). The emission maximum lies at 1270 nm. The data suggest that the luminescence is generated by oxygen in the 1 delta g state produced by the energy transfer from triplet molecules of the pigments to O2.

UI	MeSH Term	Description	Entries
D009279	Naphthacenes	Polyacenes with four ortho-fused benzene rings in a straight linear arrangement. This group is best known for the subclass called TETRACYCLINES.	Tetracenes,Benz(b)Anthracenes
D010100	Oxygen	An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.	Dioxygen,Oxygen-16,Oxygen 16
D011524	Protoporphyrins	Porphyrins with four methyl, two vinyl, and two propionic acid side chains attached to the pyrrole rings. Protoporphyrin IX occurs in hemoglobin, myoglobin, and most of the cytochromes.
D002251	Carbon Tetrachloride	A solvent for oils, fats, lacquers, varnishes, rubber waxes, and resins, and a starting material in the manufacturing of organic compounds. Poisoning by inhalation, ingestion or skin absorption is possible and may be fatal. (Merck Index, 11th ed)	Tetrachloromethane,Tetrachloride, Carbon
D012996	Solutions	The homogeneous mixtures formed by the mixing of a solid, liquid, or gaseous substance (solute) with a liquid (the solvent), from which the dissolved substances can be recovered by physical processes. (From Grant & Hackh's Chemical Dictionary, 5th ed)	Solution
D013057	Spectrum Analysis	The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Spectroscopy,Analysis, Spectrum,Spectrometry
D049449	Luminescence	Emission of LIGHT when ELECTRONS return to the electronic ground state from an excited state and lose the energy as PHOTONS. It is sometimes called cool light in contrast to INCANDESCENCE. LUMINESCENT MEASUREMENTS take advantage of this type of light emitted from LUMINESCENT AGENTS.	Luminescence, Physical,Chemiluminescence,Chemiluminescence, Physical,Physical Chemiluminescence,Physical Luminescence