Synthesis, crystal structures and optical properties of two coordination polymers from 4-(1H-tetrazol-5-yl) benzoic acid

The coordination polymers [Mn(4-TZBA(2-))(H2O)(2)] (1) and [Mn-4(4-TZBA(2-))(4)(mu(2)-H2O)(2)(H2O)(py)] (2) (py = pyridine) were prepared by the treatment of Mn(ClO4)(2) center dot 6H(2)O with 4-(1H-tetrazol-5-yl) benzoic acid (H-2(4-TZBA)) under hydrothermal conditions. Compound 2 has nanosize triangular channels with a dimension of 11.924 x 11.686 x 14.835 angstrom, in which guest water molecules are encapsulated. Compound 1 and 2 show strong fluorescence at room temperature in the solid state and compound 2 exhibits a second-order coefficient about 0.3 time that of KDP. (C) 2008 Elsevier B.V. All rights reserved.