Diverse topologies in copper aromatic dicarboxylate coordination polymers containing 3-pyridylmethylnicotinamide: Effect of geometric isomerism and ring substituent

• Copper coordination polymers with 3-pyridylmethylnicotinamide (3-pmna).
• Rare 3,5-connected 3-D net with uncommon gra topology for terephthalate.
• Very rare 3-D self-penetrated net with 86tcb topology for isophthalate.
• Double ribbon and single ribbon topology for substituted isophthalates.

Hydrothermal reaction of copper nitrate and 3-pyridylmethylnicotinamide (3-pmna) with aromatic dicarboxylates has afforded a series of coordination polymers that were structurally characterized via single-crystal X-ray crystallography. [Cu(tere)(3-pmna)]n (1, tere = terephthalate) displays a 3,5-connected 3-D binodal net with uncommon (63)(698) gra topology. {[Cu(iph)(3-pmna)(H2O)]·3H2O}n (2, iph=isophthalate) possesses an extremely rare 4-connected 3-D self-penetrated net with 86tcb topology. [Cu2(nip)2(3-pmna)2]n (3, nip = 5-nitroisophthalate) manifests a doubled chain 1-D structure, while increased steric bulk in [Cu(tbip)(3-pmna)]n (4, tbip = 5-tert-butylisophthalate) results in a 1-D single chain motif. A significant dependence of the dimensionality and topology of these materials on the part of the carboxylate donor disposition and ring substituent was thus revealed. Thermal properties of these new materials were also investigated.

Hydrothermal reaction of copper nitrate and 3-pyridylmethylnicotinamide (3-pmna) with aromatic dicarboxylates has afforded a series of 3-D and 1-D coordination polymers. {[Cu(isophthalate)(3-pmna)(H2O)]·3H2O}n (pictured) possesses an extremely rare 4-connected 3-D self-penetrated net with 86tcb topology.Figure optionsDownload as PowerPoint slide