A supramolecular [Mn(NCS)2(H2O)2(HMTA)2][Mn(NCS)2(H2O)4](H2O)2 was synthesized by the reaction of MnSO4·H2O and KSCN with hexamethylene- tetramine (HMTA). The results of single-crystal X-ray diffraction reveal that the compoudn consists of [Mn(NCS)2(H2O)2(HMTA)2],[Mn(NCS) 2(H2O)4] and H2O. One N atom of each HMTA coordinates to Mn atom, other three N atoms form hydrogen bonds with [Mn(NCS)2(H2O)4] and H2O. [Mn(NCS)2(H2O)2(HMTA)2],[Mn(NCS)2(H2O)4] and H2O form seven kinds of hydrogen bonds to lead a supramolecule of three-dimensional structure. Its third-order nonlinear optical properties were determined in DMF solution. The n2 and χ^(3) were measured to be 9.52×10^-9m^2·W^-1 and 3.14×10^-12 esu, respectively.

Key words: HYDROGEN BONDS, HEXAMETHYLENE TETRAMINE, PREPARATION, CRYSTAL STRUCTURE, MANGANESE COMPOUNDS, SUPERMOLECULAR STRUCTURE, NON LINEAR OPTICS