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Science 24 August 1990:
Vol. 249. no. 4971, pp. 895 - 897
DOI: 10.1126/science.11538081
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Articles

Science, Vol 249, Issue 4971, 895-897
Copyright © 1990 by American Association for the Advancement of Science

articles

The C7 cluster: structure and infrared frequencies

Heath JR, RA Sheeks, AL Cooksy, and RJ Saykally

Department of Chemistry, University of California, Berkeley 94720, USA.

Observation and characterization of the C7 cluster are reported. Carbon clusters are produced by laser vaporization of a graphite target followed by supersonic expansion of the vaporized material within a gas dynamically focused argon jet. Thirty-six sequential rovibrational lines of the nu 4 antisymmetric stretch fundamental of C7 are probed by gated detection of diode laser absorption. The observed spectrum is characteristic of a symmetrical linear molecule. Analysis of the spectrum indicates an effective average bond length of 1.2736(4) angstroms and a vibrational frequency of 2138.1951(10) reciprocal centimeters, in excellent agreement with ab initio calculations. This work will facilitate the astrophysical detection of this cluster.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Electron Photodetachment Cross Sections of Small Carbon Clusters: Evidence for Nonlinear Isomers.
D. Zajfman, H. Feldman, O. Heber, D. Kella, D. Majer, Z. Vager, and R. Naaman (1992)
Science 258, 1129-1131
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)