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Reactions of Cd(OAC)2·2H2O with m-thioacetatebenzoic acid(H2L)and 1,10-phenanthroline(phen)give rise to a metal-organic framework,[CdL(phen)]n(1).X-ray single-crystal diffraction reveals that 1 crystallizes in the monoclinic system,space group C2/c,with a=25.7099(5),b=10.3872(2),c=19.1820(4)(A),β=131.114(1)°,V=3859.4(1)(A)3,Mr=502.80,Z=8,F(000)=2000,μ=1.271 mm-1,Dc=1.731 g·cm-3,the final R=0.0226 and wR=0.0559 for 3817 observed reflections(I>2σ(I)).1 displays a 1D double-strand chain structure with crab-like dinuclear subunits,and extends into a 3D network by π-π interactions and C-H…O hydrogen bonds.Photolumineseenee studies reveal that it aisplays intense structure-related fluorescent emission bands(λex=342 nm)at 370.5 and 389 nm in the solid state at room temperature.