title: Tridecanuclear and docosanuclear manganese phosphonate clusters with slow magnetic relaxation.
abstract: Two novel mixed-valent manganese phosphonate clusters [MnIIMnIII12O6(OH)6(O3PC6H11)10(py)6] (1) and [MnII4MnIII18O12(O3PC6H11)8(O2CCH3)22(H2O)6(py)2] (2) are reported in this paper. Complex 1 is the first carboxylate-free manganese phosphonate cluster. While compound 2 appears to be the largest manganese cluster thus far that contains phosphonate ligand. Both show slow magnetic relaxation behaviors.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China.
authors.forename: Yun-Sheng
authors.initials: YS
authors.lastname: Ma
authors.forename: You
authors.initials: Y
authors.lastname: Song
authors.forename: Yi-Zhi
authors.initials: YZ
authors.lastname: Li
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Zheng