Position dependent deuterium effects on the phosphorescence lifetime of phenanthrene

Journal Article · Wed Feb 16 04:00:00 EST 1977 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00446a028· OSTI ID:7310333

Miller, J C; Breakstone, K U; Meek, J S; Strickler, S J

Phosphorescence lifetimes are reported for phenanthrene, the five monodeuteriophenanthrenes, and perdeuteriophenanthrene in EPA and 3-methylpentane at 76 K. A significant variation in lifetime with the position of deuteration is noted. The lifetimes in EPA are in the order tau/sub d/sub 0// < tau/sub 2d/sub 1// < tau/sub 1d/sub 1// < tau/sub 3d/sub 1//similarly ordered tau/sub 4d/sub 1// < tau/sub 9d/sub 1/ < tau/sub d/sub 10/. Specifically, the lifetime lengthening upon deuteration at the 2 position is about 1 percent, at the 1, 3, and 4 positions are all about 6 percent, and at the 9 position is about 34 percent. Comparison with other published lifetimes indicates that the deuterium effects are additive. The significance of the results for current theories of radiationless transitions is briefly discussed.

• Research Organization: Univ. of Colorado, Boulder
• OSTI ID: 7310333
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 99:4; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
AROMATICS
CONDENSED AROMATICS
DEUTERIUM
HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPES
LIFETIME
LIGHT NUCLEI
LUMINESCENCE
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PHENANTHRENE
PHOSPHORESCENCE
STABLE ISOTOPES