FDMR in low-temperature solids. 2. Observation of weakly bound electrons

Journal Article · Thu Dec 15 04:00:00 EST 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100101a028· OSTI ID:6650638

Shkrob, I A; Werst, D W; Trifunac, A D ^[1]

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1. Argonne National Lab., IL (United States)

Time-resolved fluorescence-detected magnetic resonance (FDMR) was used to study radiolysis of organic solids at low temperatures (4-30 K). The mobility of charges generated in the primary events of solid-state radiolysis may be accounted for by two mechanisms: single-step tunneling and relatively slow (10[sup 6]-10[sup 7] s[sup [minus]1]) resonant charge transfer involving the solvent hole. Acting together, these mechanisms engender a variety of unusual and previously unknown spectral features. Although the tunneling satisfactorily explains FDMR behavior in general, quantitative agreement is poor, particularly for donor-acceptor systems. It appears that the origin of this discrepancy lies in an underestimation of the tunneling radii in reactions of negative charges. The latter is rationalized in terms of a selectivity of FDMR toward mobile weakly bound electrons and excited radical anions formed after electron scavenging. The possible nature of these weakly bound electronic states is discussed. 50 refs., 13 figs., 2 tabs.

• OSTI ID: 6650638
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:50; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
400600 -- Radiation Chemistry
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ANTHRACENE
AROMATICS
CHARGE TRANSPORT
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
COMPILED DATA
CONDENSED AROMATICS
DATA
DECOMPOSITION
ELECTRON TRANSFER
FLUORESCENCE
HYDROCARBONS
INFORMATION
IONS
LUMINESCENCE
MAGNETIC RESONANCE
MATHEMATICAL MODELS
NAPHTHALENE
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIATION EFFECTS
RADICALS
RADIOLYSIS
RECOMBINATION
RESONANCE
SCAVENGING
SCINTILLATIONS
SPECTROSCOPY
TUNNEL EFFECT