Detection of Near-IR Singlet Oxygen Luminescence with an FT-Raman Spectrometer

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Abstract:

The first excited state of molecular oxygen, O2(1Δ g ), lying at 0.98 eV above the ground state, O2(3Σ g -), is relatively long-lived as a consequence of the multiple forbiddenness of the O2(1Δ g ) → O2(3Σ g -) transition. As a result, O2(1Δ g -) shows high reactivity to organic substrates, and irreversible photo-oxidative damage may occur. A typical example is that singlet oxygen is believed to be the cytotoxic species generated in the photodynamic therapy (PDT) of cancer.

Keywords: FT-Raman; Near-IR phosphorescence; Singlet molecular oxygen

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370294775268947

Affiliations: 1: Department of Chemistry, Keele University, Keele, Staffordshire, ST5 5BG, U.K.; present address: Center for the Study of Early Events in Photosynthesis, Arizona State University, Tempe, AZ 85287-1604, U.S.A. 2: Applications and Support Group, Bruker Spectrospin Ltd., Banner Lane, Coventry, CV4 9GH, U.K. 3: Department of Chemistry, Keele University, Keele, Staffordshire, ST5 5BG, U.K.

Publication date: April 1, 1994

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