The　reaction　of　CdCl(2)2.5H(2)O　with　1,1-bis(3-carboxybenzyl)-4,4-bipyridinium　dichloride　(H(2)L1Cl(2))　or　4,4-bis[(3-carboxypyridino)methyl]-biphenyl　dichloride　(H(2)L2Cl(2))　in　a　dimethylformamide/methanol　mixed-solvent　system　at　room　temperature,　affording　the　complexes　[(CdCl2)(3)(L1)(3)](n)　(1)　and　{[CdCl2(L2)(H2O)(2)]2H(2)O}(n)　(2).　They　were　characterized　by　elemental　analyses,　IR　spectroscopy,　and　single-crystal　X-ray　diffraction.　Both　1　and　2　exhibit　1D　coordination　networks,　which　further　stack　into　a　3D　supramolecular　structure　by　hydrogen　bonding　and　-　interactions.　Furthermore,　these　two　complexes　exhibit　different　photochromic　behavior　in　the　solid　state,　which　may　originate　from　different　charge-distributions　of　H(2)L1Cl(2)　and　H(2)L2Cl(2)　ligands.