Excited-state behavior and one-electron reduction of C[sub 60] in aqueous [gamma]-cyclodextrin solution

Journal Article · Thu Jul 22 04:00:00 EDT 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100131a035· OSTI ID:5834367

Dimitrijevic, N M; Kamat, P V ^[1]

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1. Univ. of Notre Dame, IN (United States)

Excited-state properties and one-electron reduction of C[sub 60] in aqueous [gamma]-cyclodextrin ([gamma]-CD) solutions have been studied by laser flash photolysis and pulse radiolysis techniques. The difference absorption spectrum of C[sub 60][sup [minus]] anion radical in aqueous [gamma]-CD solution has been characterized by reducing C[sub 60] with radiolytically produced radicals (e[sub aq][sup [minus]], (CH[sub 3])[sub 2]COH or MV[sup [center dot]+]). The one-electron reduction potential of the ground-state C[sub 60] in aqueous [gamma]-cyclodextrin solution (E[degrees] = [minus]0.25 V vs NHE) has been measured by equilibrating fullerene solution with MV[sup 2+]/MV[sup [center dot]+] couple. Inorganic anions, such as N[sub 3][sup [minus]], I[sup [minus]], NO[sub 2][sup [minus]], ClO[sub 2][sup [minus]] and SCN[sup [minus]], quench the excited triplet C[sub 60] and participate in the electron-transfer process. 35 refs., 5 figs., 1 tab.

• OSTI ID: 5834367
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:29; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
CARBON
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FULLERENES
LASER RADIATION
MIXTURES
NONMETALS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
REDUCTION
SOLUTIONS