[The structure and spectral research on Mn2 [V12 B16 O52 (OH)6 ] (en) 2 (H3O)6 (H2O)5 (en = ethylenediamine)].

A novel polyoxovanadium borate Mn2[V12B16O52 (OH)6](en)2 (H3O)6 (H2O)5 1(en = ethylenediamine) was hydrothermally synthesized and characterized by IR, two-dimensional infrared (2D IR) correlation spectroscopy with magnetic and thermal perturbation, and single crystal X-ray diffraction. In 1, it is interesting that each [V12B16O52 (OH)6]14- units is connected by four [Mn(H2O)2]2+ to generate a 2D layer on the ab plane. Along c axis, these layers are further linked by H-bond to form a 3D framework. The response of the stretching vibrations of B-O, V-O-V and Mn-O-B was detected in the 2D IR correlation spectra with magnetic perturbation. In addition, the response of the stretching vibrations of B-OH, B-O, V-O-V and Mn-O-B was detected in the 2D IR correlation spectra with thermal perturbation.