1. a Laboratoire de Chimie Inorganique et Matériaux Moléculaires, E.S.A. C.N.R.S. 7071 , Université Pierre et Marie Curie , 75252 , Paris , France
2. c Institute of Applied Physics, Academy of Sciences of Moldova , Kishinev , Moldova
3. b Institute of Chemistry, Academy of Sciences of Moldova , Kishinev , Moldova