Hydrothermal treatment of CuCl and atropisomeric ligand racemic-diethyl (R,S)-4,4'-biquinoline-6,6'-diethyl-3,3'-dicarboxylate (DBBD) (1) in the presence of H2O and C2H5OH over 4 days at 104～109 ℃ yielded colorless block crystals [CuCl(DBBD)2]n (2). The compound exhibits strong red fluorescent emission with a wavelength of 650 nm. The crystal of [CuCl(DBBD)2]n belongs to monoclinic system with space group C2/c, and a=1.656 58(17) nm, b=2.025 0(2) nm, c=1.548 73(16) nm,β=107.879(2)°, V=4.9444(9) nm3, Dc=1.417 g·cm-3, Z=8.
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