Singlet molecular oxygen by direct excitation

Autor:	Martin Gouterman, Nicholas J. Turro, Elizabeth K. Thompson, Steffen Jockusch, James B. Callis, Gamal Khalil
Rok vydání:	2008
Předmět:	Photomultiplier Chemistry Singlet oxygen Singlet molecular oxygen Analytical chemistry chemistry.chemical_element Photochemistry Oxygen chemistry.chemical_compound Chemical engineering Phase (matter) Molecule Physical and Theoretical Chemistry Luminescence Spectroscopy FOS: Chemical engineering
Zdroj:	Photochemical & Photobiological Sciences. 7:235-239
ISSN:	1474-9092 1474-905X
Popis:	Direct excitation at 1064 nm and detection of singlet molecular oxygen at 1270 nm is made possible by the availability of powerful YAG-lasers and sensitive NIR photomultipliers. Singlet oxygen was generated in condensed phase at 77 K by direct excitation at 1064 nm (without the use of sensitizers). Several luminescing species were observed by time resolved luminescence spectroscopy and luminescence lifetime measurements, including the single molecule (1)Delta(g)and (1)Sigma(g)(+)states as well as luminescence from the [(1)Delta(g)](2) simultaneous transition. As an application we propose a novel method for obtaining quantitative non-intrusive mapping of the 2-D oxygen concentrations and pressure at cryogenic temperatures, which is of importance in aircraft design for high altitudes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d0c4c4cd70b50f82736d6c48d0d15e6 https://doi.org/10.1039/b714286b Zobrazit plný text záznamu Full text from SpringerLink