One new AgI complex, [Ag（apca）（H2O）]n （Hapca = 3-aminopyrazine-2-carboxylic acid）, has been prepared and structurally and spectroscopically characterized. The title complex （1） crystallizes in the monoclinic system P21/c （No. 14） with a = 14.3307（9）, b = 14.9296（9）, c = 6.5824（4）A, β = 92.7430（10）o, V = 1406.70（15） A3, Z = 8. Mr = 264.00, Dc= 2.493 g/cm3, μ = 2.831 mm-1, F（000） = 1024, the final R = 0.0266 and wR = 0.0788 for 3107 observed reflections with I 〉 2σ（I）. Its structure features a three-dimensional （3D） network composed of one-dimensional （1D） [Ag（apca）（H2O）]n ribbonsinterconnected via weak hydrogen bonds and π-π interactions. Emission spectra of the title complex in the solid state at room temperature give strong green luminescence.
