The hydrothermal reaction of ZnSO4 with 2,5-di(1H-imidazol-4-yl)thiophene (L) at 100°C yields a new complex [Zn(L)(SO4)]n (1). Complex 1 has been characterized by single-crystal X-ray diffraction, IR spectroscopy, and elemental and thermogravimetric analyses. It crystallizes in the monoclinic system, space group P21/c with Z=4, and shows a (44.62) network structure. Complex 1 shows fluorescence. Single crystals of L·2H2O were accidentally obtained in hydrothermal reaction attempts of L with MnCl2 at 120°C.