Redox and excitation studies with C{sub 60}-substituted malonic acid diethyl esters

Journal Article · Thu Jun 08 04:00:00 EDT 1995 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100023a013· OSTI ID:70354

Guldi, D M; Hungerbuehler, H; Asmus, K D ^[1]

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1. Hahn-Meitner-Institut Berlin (Germany)

In this work we will report on the formation and quenching of triplet excited states and on the radical-induced and electrochemical reduction of chemically synthesized mono-, bis-, and tris-adducts of C{sub 60}. We will also demonstrate the complementarity of radiation- and light-induced techniques for such studies on fullerene properties. It is seen that functionalization of C{sub 60} leads, as expected, to a disturbance of the fullerenes {pi}-systems. This very sensitively shows up in many electronically related parameters, such as optical absorptions of triplet excited states and radical anions, and the entire redox properties as could be demonstrated by application of a variety of techniques. Markable effects are even noticed for fullerenes carrying the same number of functionalized groups if these are located at different sites relative to each other. In general, the degree of disturbance relative to plain C{sub 60} increases with the number of functional groups. Among the multifunctionalized fullerenes the resonance within the {pi}-system seems least affected by equatorial positioning of the functionalized groups. 42 refs., 7 figs., 3 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 70354
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 23 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
ABSORPTION SPECTRA
ANIONS
ELECTROCHEMISTRY
ESTERS
EXCITED STATES
FULLERENES
MALONIC ACID
PHOTOLYSIS
RADIOLYSIS
REDOX REACTIONS