A novel dimeric polyanion based on mono-manganese substituted Keggin-type phosphotungstate: (MnPW11O39)210 −

• A novel dimeric phosphotungstate based on mono-substituted Keggin-type has been synthesized.
• The dimeric polyanion is linked by two TM-μ2-O-TM bridges.
• The antiferromagnetic interactions exist among the Mn·Mn ions.

The novel dimeric polyoxometalate, (MnPW11O39)210 − (1a), has been synthesized by reacting [B-α-PW9O34]9 − with Mn2 + ions in weak acid aqueous solution (pH = 5.3) under hydrothermal condition and isolated in the form of (C14H14N4)5H10(MnPW11O39)2·2H2O (1), which was characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis, and magnetic measurements. The polyanion represents the first example of dimeric polyanion based on mono-transition metal (TM) substituted Keggin-type polyanions linked by two TM-μ2-O-TM bridges. Magnetic measurements show that the Mn┄Mn exchange interactions are weakly antiferromagnetic (J = − 0.53 cm− 1).

A novel dimeric polyanion based on mono-manganese substituted Keggin-type phosphotungstate has been successfully synthesized and fully characterized.Figure optionsDownload as PowerPoint slide