STUDY OF IRON–CARBON MIXED CLUSTERSFeCn(n=2−5): A POSSIBLE LINEAR-TO-CYCLIC TRANSITION FROM FeC3TO FeC4

Lai-Sheng Wang
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Lai-Sheng Wang: Department of Physics, Washington State University, Richland, WA 99352, USA;

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 423-427

Abstract: Small Fe/C mixed clusters,${\rm FeC}_n^- (n =2 - 5)$, are studied by anion photoelectron spectroscopy at 3.49-eV photon energy. The spectra of${\rm FeC}_2^-$and${\rm FeC}_3^-$show well-resolved features and are consistent with linear-to-linear detachment transitions. The${\rm FeC}_4^-$spectrum is quite broad, suggesting large geometry change from the anion to the neutral. Since${\rm FeC}_4^-$is known to be linear, our data suggest that neutral FeC4may have a cyclic structure. The spectrum of${\rm FeC}_5^-$exhibits both sharp and broad features, consistent with the existence of both a linear and a cyclic isomer. A linear-to-cyclic structural transition is thus suggested to take place for the neutral FeCnclusters fromn=3−4; forn

Date: 1996
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DOI: 10.1142/S0218625X96000760

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