Syntheses, crystal structures and photoluminescence of two Cd(II) coordination polymers derived from a flexible bipyridyl ligand

A flexible bipyridyl ligand 2,20-bis(3-pyridylmethyleneoxy)-1,10-biphenylene (3,30-bpp) was prepared for the construction of coordination frameworks. Two cadmium(II) coordination polymers, [Cd(m-3,30-bpp)2Br2]n (1) and [Cd(m-3,30-bpp)(m-SCN)2]n (2) have been synthesized by the self-assembly between 3,30-bpp and cadmium(II). 3,30-bpp in 1 acts as a exo-bidentate ligand bridging CdBr2 unit to form a 1D double chains structure, while 3,30-bpp and SCN2 in 2 bridge Cd(II) centers resulting in a 1D zigzag chain structure. The solid-state fluorescent analyses show that complex 1 and 2 exhibit an intense broad emission band at 464 and 496 nm, respectively. q 2004 Elsevier B.V. All rights reserved.