The solvothermal reaction of zinc acetate dihydrate with a mixture of benzene-1,4-dicarboxylic acid (H2BDC) and benzene-1,3,5-tricarboxylic acid (H3BTC) in a solution containing N,N'-dimethyl-formamide (DMF), absolute ethanol, and chlorobenzene gave rise to a metal-organic polymer, Zn-3.BDC.2BTC.2NH(CH3)(2).2NH(2)(CH3)(2). The structure of this polymer possesses a unique three-dimensional framework with tri-zinc clusters, and BDC and BTC units colinking the clusters. Moreover, this metal-organic polymer exhibits strong photoluminescence at room temperature, and the main emission band is at about 430 nm (lambda(ex) = 325 nm). Crystal data for this compound (C17H2ON2O8Zn1.5): monoclinic, space group P2(1)/n, cell dimensions a = 11.6171(3) Angstrom, b = 14.2456(4) Angstrom, c = 12.6426(3) Angstrom, beta = 107.030(2)degrees, V = 2000.51 (9) Angstrom(3), and Z = 4.