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

Abstract The coordination polymers [Mn(4-TZBA 2− )(H 2 O) 2 ] ( 1 ) and [Mn 4 (4-TZBA 2− ) 4 (μ2-H 2 O) 2 (H 2 O)(py)] ( 2 ) (py = pyridine) were prepared by the treatment of Mn(ClO 4 ) 2  · 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 × 11.686 × 14.835 A, 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.