Toward the Synthesis of High Boron Content Polyanionic Multicluster Macromolecules

Spanish Ministerio de Ciencia y Tecnologia (MAT2006-05339 and FPU grant to A.C.), CSIC (I3P grant to P.F.) and the Generalitat de Catalunya 2005/SGR/00709 are appreciated. Support from the Ministry of Education of the Czech Republic (Project LC523 and Research Plan AV0Z40320502) and Grant Agency of the Academy of Sciences of Czech Republic (Project No. IAAX00320901).