Three-Dimensional Metal(II)−Organic Coordination Polymers from Binuclear, Trinuclear, and Polynuclear Clusters Bridged by <i>p</i>-Benzenediacrylates: Syntheses, Topologies, Photosensitive Properties, and Hydrogen Uptake

The hydrothermal/solvothermal reactions of metal(II) nitrate hydrates with organic ligands (p-benzenediacrylic acid = H2pbda, 1,10-phenanthroline = phen) generate three three-dimensional (3-D) coordination polymers with (3,4)-connected (4.8.10)(42.6.8 × 102) topology (1, {[Cd2(pbda)2(phen)2](H2O)}n), 2-fold interpenetrating CdSO4-type open framework (2, [Zn3(pbda)3(phen)2]n), and 3-fold interpenetrated sra net (3, [Pb(pbda)]n). The porous zinc open framework 2 has the typical type-I sorption curve with a H2 uptake of 31 cm3·g−1(STP) at 77 K, BET surface area of 65.84 m2·g−1, and meso-[Zn2(pbda)2] helical motifs. With strong luminescent emission at 504 nm, complex 2 may be suitable as an excellent candidate for solid-state photosensitive materials at room temperature.