Unusual double layer coordination polymers constructed from metal(II)-3-fluorophthalate helices and M–tib honeycom layers (tib = 1,3,5-tris(1-imidazolyl)benzene)

Two coordination polymers, [M(Fpht)tib]·H2O (M = Cd 1, Co 2; H2Fpht = 3-fluorophthalic acid and tib = 1,3,5-tris(1-imidazolyl)benzene) have been synthesized and structurally characterized by single crystal X-ray diffraction. They possess unusual double layer structures constructed from M–Fpht helices and (3, 3) M–tib honeycom layers. The fluorescence of the complexes maybe arise from the intraligand π⁎–π transition.