Concerted electron and proton movement in quenching of triplet C[sub 60] and tetracene fluorescence by hydrogen-bonded phenol-base pairs

Journal Article · Thu Feb 16 04:00:00 EST 1995 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100007a010· OSTI ID:6566223

Biczok, L; Linschitz, H ^[1]

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1. Brandeis Univ., Waltham, MA (United States) Hungarian Academy of Sciences, Budapest (Hungary)

The quenching of triplet C[sub 60] and tetracene fluorescence by phenols is strongly enhanced by added pyridines. Evidence that this is due to quenching by hydrogen-bonded phenol-base pairs is given by the close agreement between equilibrium constants for hydrogen-bond formation derived from kinetic measurements and from independent spectroscopic data. The effect is attributed to a trimolecular transition state in which electron transfer from the phenol to the excited molecule is concerted with proton movement from the incipient strongly acidic phenol cation radical to the hydrogen-bonded base. 13 refs., 2 figs., 1 tab.

• OSTI ID: 6566223
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 99:7; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360600* -- Other Materials
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400500 -- Photochemistry
664200 -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
AROMATICS
AZINES
CARBON
CHEMICAL BONDS
CONDENSED AROMATICS
ELECTRON TRANSFER
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FLUORESCENCE
FULLERENES
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
LUMINESCENCE
MULTIPLETS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENOLS
PYRIDINE
PYRIDINES
QUENCHING
TETRACENE
TRIPLETS