We present a study of the ground and triplet state properties of C$\sb{60}$O. UV-vis spectroscopy and a gravimetric analysis are used to produce a quantitative electronic absorption spectrum. Spectrofluorimetry reveals that the fluorescence quantum yield of C$\sb{60}$O is $8.1\times 10\sp{-4}$, which is a factor of 2.5 higher than that of C$\sb{60}$. Transient absorption spectroscopy is used to study the triplet state of C$\sb{60}$O, which is seen to exhibit complex decay kinetics. A possible explanation for this behavior involving triplet mediated epoxide ring opening is presented. The intrinsic triplet lifetime is determined to be 6.8 $\pm$ 0.3 $\mu$s, making C$\sb{60}$O the shortest lived fullerene derivative studied to date. Additional studies reveal that the decay of C$\sb{60}$O triplets has a mild temperature dependence corresponding to an E$\sb{\rm a}$ value of 4.5 $\mu$ 0.6 kJ/mol, whilt self-quenching is seen to play a negligible role. Furthermore, solutions of C$\sb{60}$O are shown to be unstable with respect to temperature, generating unknown impurities even at room temperature. Mass spectrometric studies failed to unambiguously identify the product contaminant.
| Identifer | oai:union.ndltd.org:RICE/oai:scholarship.rice.edu:1911/17154 |
| Date | January 1998 |
| Creators | Benedetto, Angelo Francis |
| Contributors | Weisman, R. B., Brooks, P. |
| Source Sets | Rice University |
| Language | English |
| Detected Language | English |
| Type | Thesis, Text |
| Format | 69 p., application/pdf |
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