Argon, cluster structure

Dehmer and Pratt were one of the earliest groups to observe resonance structures in the photoionization efficiency (PIE) curves of small argon ions and mixed rare gas cluster ions (Dehmer and Pratt 1982 Pratt and Dehmer 1982). The structures in the PIE curves of small argon cluster ions were attributed to interband transitions while the features observed in the PIE curves of mixed rare gas cluster ions were suggested to arise from autoionizing states. Walters et al. (1985) also observed similar resonances in the PIE curves of C6H6/HC1... 

In order to prepare metastable states or possibly new phases of nano-scale metal particles, low temperature, kinetic growth methods should be used.(4J And atoms should be used, rather than salts or oxides since in the former case the high temperature reduction step can be avoided. In actuality, in recent years we have witnessed the development of several methods for the low temperature kinetically controlled growth of clusters from free atoms. Perhaps the most dramatic development has been the "cluster beam" approach where evaporated metal atoms are allowed to cluster in low temperature gaseous helium or argon streams.(5-2(9) Unusual cluster structures and reactivities have been realized. 

The 1 1 aniline/argon clusters are usually assumed to have structure 107 while 108 is indicated to be less stable than 107. The isomeric structures of [aniline/argon2]+ clusters in the cationic ground states are depicted in 110-112180,181. 

Fig. 14. Simulated EXAFS signals of variable size argon clusters fcc-structures (left), multishell icosahedra (MIC) (right). Further details are described in the text and in Ref. 73.

Farges, J. Feraudy, M.F. Raoult, B. Torchet, G. Structure and temperature of rare gas clusters in a supersonic expansion. Surf. Sci. 1981, 106, 95-100 Farges, J. Raoult, B. Torchet, G. Crystalline and noncrystalline effects in electron diffraction patterns from small clusters in an argon cluster beam. J. Chem. Phys. 1973, 59, 3454—3458. 

Ninomiya, S., Ichiki, K., Yamada, H., Nakata, Y, Seki, T., Aoki, T., Matsuo, J. (2009) Molecular depth profiling of multilayer structures of organic semiconductor materials by secondary ion mass spectrometry with large argon cluster ion beams. Rapid Commun. Mass Spectrom., 23, 3264-3268. 

E.Ya. Misochko, A.V. Akimov, S.V. Chapyshev, High resolution EPR spectroscopy of septet 3,5-dichloropyridyl-2,4,6-trinitrene in solid argon. Fine-structure parameters of six electron-spin cluster, J. Chem. Phys., 2008, 129, 174510(1-7). 

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