Quantum yield of photosensitized singlet oxygen (a[sup 1][Delta][sub g]) production in solid polystyrene

Journal Article · Mon Aug 15 00:00:00 EDT 1994 · Macromolecules; (United States)

DOI:https://doi.org/10.1021/ma00095a020· OSTI ID:6885544

Scurlock, R D; Martire, D O; Ogilby, P R ^[1]; Taylor, V L; Clough, R L ^[2]

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1. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemistry
2. Sandia National Labs., Albuquerque, NM (United States)

The quantum yield of singlet oxygen (a[sup 1][Delta][sub g]), produced by energy transfer from the photosensitizer acridine, has been determined by two independent spectroscopic methods in solid polystyrene. Upon 355-nm pulsed-laser irradiation of acridine at 1.3 mJ/pulse, the O[sub 2](a[sup 1][Delta][sub g]) quantum yield in polystyrene [[phi][sub [Delta]][sup PS](acridine) = 0.56 [+-] 0.05] is slightly smaller than that in a liquid solvent analog such as benzene [[phi][sub [Delta]][sup benz](acridine) = 0.83 [+-] 0.06]. These data indicate that the photosensitized yields of O[sub 2](a[sup 1][Delta][sub g]) in a solid polymer matrix can nevertheless be appreciable, which may be important for understanding the photodegradation of some polymeric materials or dyes and other additives dissolved in those materials.

• DOE Contract Number: AC04-94AL85000
• OSTI ID: 6885544
• Journal Information: Macromolecules; (United States), Journal Name: Macromolecules; (United States) Vol. 27:17; ISSN MAMOBX; ISSN 0024-9297
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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ACRIDINES
AROMATICS
AZAARENES
AZINES
BIODEGRADATION
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
HETEROCYCLIC COMPOUNDS
LASER RADIATION
MATERIALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOTOCHEMISTRY
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
PYRIDINES
RADIATIONS
SYNTHETIC MATERIALS