文摘
We investigated the adsorption of C2H radical on small cobalt clusters by mass spectrometry and by measuring the photoelectron spectra of ConC2H鈭?/sup> (n = 1鈭?) cluster anions. The most stable structures of ConC2H鈭?/sup> (n = 1鈭?) and their neutrals were determined by comparing the experimental results with theoretical calculations. Our studies show that C2H radical still maintains its integrity as a structural unit in ConC2H鈭?/sup> clusters, rather than being divided by Con clusters. The most stable isomers of Co1鈭?C2H鈭?/sup> clusters are linear with the C2H interacting with only one Co atom, while those of Co3鈭?C2H鈭?/sup> cluster anions are quasi-planar structures with the carbon鈭抍arbon bonds bending slightly toward the Co3鈭? clusters. The carbon鈭抍arbon bond of C2H is lengthened more in Co3鈭?C2H鈭?/sup> clusters than in Co1鈭?C2H鈭?/sup>.