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Abstract
Mesogenic nanosystems including silver and copper, and long-chain alkylcyanobiphenyls (CB) and alkylcyanophenylpyridines (PPy) have been obtained by low-temperature vacuum co-condensation of reagent vapors on cooled support surfaces. The formation of metastable bi-ligand π-complexes of metal atoms and small clusters during co-condensation at low temperatures have been shown by FTIR, ESR and UV-Vis spectroscopy combining with the results of quantum chemistry calculations at HF/MP2 and DFT/B3LYP levels. Controlled thermal treatment of co-condensate samples allowed the directed formation of metal nanoparticles of definite size from 2 up to 100 nm. Formation of silver nanoclusters was also caused by UV-irradiation of co-condensate films.
Acknowledgment
The author is very grateful to Prof. D. Bruce (York University, UK), Prof. Gleb B. Sergeev and Prof. Alexander Nemukhin (MSU, Moscow, Russian Federation) for fruitful discussions and promotion of the work. The author thanks the collaborators from Moscow State University: Dr. Yu. N. Morosov for participation in ESR experiments, Dr. A. V. Bochenkova for help in quantum chemistry calculations and Dr. S. S. Abramchuk for TEM measurements. The work was financially supported by RFBR grant 08-03-00798a.