J. Phys. IV France 05 (1995) C5-373-C5-377
Barium Diketonates as Precursors for HTSC Thin Films : Structure and PropertiesA. Drozdov and S. Troyanov
Moscow State University, Department of Chemistry, 119899 Moscow, Vorobjevy Gory, Russia
Homoligand and mixed ligand barium diketonate complexes have been synthesized and characterized by X-ray structure determination. Homoligand complexes with dipivaloylmethane hexafluoroacetone and pivaloyltrifluoroacetone have oligigomeric or polymeric structure. The mixed complexes with additional anionic ligands (Cl- OH-, Piv-) form pentanuclear complexes. The structures of the mixed ligand complexes with Lewis bases contain either mono or dinuclear chelates. Deoligomerization is accompanied by a decrease of the sublimation temperature and improves a storage stability of barium complexes used in MOCVD process for production of HTSC films.
© EDP Sciences 1995