Organometallic lanthanide complexes of Ln n (C8H8) m (Ln = lanthanide metals of Ce, Nd, Eu, Ho, and Yb; C8H8 = 1,3,5,7-cyclooctatetraene) were produced by a combination of laser vaporization and molecular beam methods. The complexes having (n, m) = (n, n + 1) for n = 1−5 were prominently produced as magic numbers in the mass spectra. Using mass spectrometry, photoionization spectroscopy, and photoelectron spectroscopy, it is concluded that these magic-numbered complexes form multiple decker sandwich structures in which Ln atoms and C8H8 molecules are alternately piled up. The obtained spectroscopic data show that these sandwich complexes are formed through ionic bonds and are charge transfer complexes, where the Ln atoms are multiply charged cations of Ln k + (k = 2 and 3) and C8H8 molecules are multiply charged anions.

No abstract

No abstract

No abstract

No abstract

No abstract

Organometallic clusters of lanthanide (Ln = Nd, Er, Eu, and Yb) and 1,3,5,7-cyclooctatetraene (C 8 H 8 ) were produced by a combination of laser vaporization and molecular beam methods. In the mass spectra of [Lnn(C 8 H 8 )m], compositions of m = n + 1 were magic numbers. From mass spectrometry, photoionization spectroscopy, and photoelectron spectroscopy, we have concluded that these magic-numbered clusters take multiple-decker sandwich structures in which Ln atoms and C 8 H 8 molecules are alternatedly piled up. These sandwich clusters are formed through ionic bonds composed of multiply charged cations [Ln k+ (k = 2 and 3)] and multiply charged anions [C 8 H h− 8 (h = 1, 1.5, and 2)].PACS. 36.40.-c Atomic and molecular clusters -36.40.Mr Spectroscopy and geometrical structure of clusters -61.46.+w Clusters, nanoparticles, and nanocrystalline materials -71.24.+q Electronic structure of clusters and nanoparticles

No abstract