pH-Directed assembly and magnetic properties of two polynuclear MnII complexes: (Δ, Λ)-{Mn3(phen)2(OOCCH3)6} and 1-D [Mn(phen)Cl2]n

When the reaction conditions are deliberately controlled by the pH, two different polynuclear manganese complexes, (Δ, Λ)-{Mn3(phen)2 (CH3COO)6} (1) and [Mn(phen)Cl2]n (2) (phen = 1,10-phenanthroline), have been synthesized from the same raw materials. The structural analyses show that 1 has a structure formed by neutral chiral linear trinuclear molecules, while 2 has a structure consisting of one-dimensional infinite chains. A study of the temperature dependent magnetic susceptibilities reveal that 1 is an antiferromagnetically coupled trimer molecule while 2 shows ferromagnetic interactions within the chain.

Graphical abstractWhen the reaction conditions are deliberately controlled by the pH, two different polynuclear manganese complexes, (Δ, Λ)-{Mn3(phen)2 (CH3COO)6} (1) and [Mn(phen)Cl2]n (2) (phen = 1,10-phenanthroline), have been synthesized from the same raw materials. The structural analyses show that 1 has a structure formed by neutral chiral linear trinuclear molecules, while 2 has a structure consisting of one-dimensional infinite chains. A study of the temperature dependent magnetic susceptibilities reveal that 1 is an antiferromagnetically coupled trimer molecule while 2 shows ferromagnetic interactions within the chain.Figure optionsDownload full-size imageDownload as PowerPoint slide