title: Synthesis, structure, magnetic properties and DFT calculations of two hydroxo-bridged complexes based on Mn(III)(Schiff-Bases).
abstract: Two hydroxo-bridged complexes, {[Mn(III)(3-CH(3)O)salen](2)[Cr(III)(salen)(OH)(2)]}ClO(4)·6H(2)O (1) and {[Mn(III)(5-CH(3))salen](2)(OH)}ClO(4)·3H(2)O (2) [salen = N,N'-ethylenebis(salicylideneiminato) dianion], have been synthesized by the hydrolysis of the corresponding Mn(III)(Schiff-Bases) derivatives and [Cr(salen)(H(2)O)(2)]Cl precursors. X-Ray structure characterization reveals the discrete linear arched trinuclear structure of 1 and the 1D chain arrangement of 2. Magnetic experimental data and density functional theory (DFT) calculations both indicate the dominant antiferromagnetic interaction mediated by the hydroxo-bridges in both 1 and 2. Frequency-dependent AC susceptibilities reveal slow relaxation of 1 in low temperature. It is worth noting that the structure and magnetic properties of 1 is comparable to a reported cyano-bridged SMM, K[(5-Brsalen)(2)(H(2)O)(2)Mn(2)Cr(CN)(6)]·2H(2)O.
authors.affiliation: State Key Lab of Coordination Chemistry, Nanjing National Laboratory of Microstructures and School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road 22, Nanjing, 210093, P. R. China.
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Zhou
authors.forename: Hui-Sheng
authors.initials: HS
authors.lastname: Wang
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
authors.forename: Yong-Lu
authors.initials: YL
authors.lastname: Xu
authors.forename: Xiao-Jiao
authors.initials: XJ
authors.lastname: Song
authors.forename: You
authors.initials: Y
authors.lastname: Song
authors.forename: Yi-Quan
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Xiao-Zeng
authors.initials: XZ
authors.lastname: You