Self-Assembly of 1D Double-Chain and 3D Diamondoid Networks of Lanthanide Coordination Polymers through In Situ-Generated Ligands: High-Pressure CO(2) Adsorption and Photoluminescence Properties

Two new lanthanide-based coordination polymers, [Sm(2)(bzz)(ben)(6)(H(2)O)(3)]·0.5H(2)O (1) and [Eu(bbz)(ben)(3)] (2), were synthesized and characterized. The described products were formed from in situ-generated benzoate (ben) and N’-benzoylbenzohydrazide (bbz) ligands, which were the products of transformation of originally added benzhydrazide (bzz) under hydrothermal conditions. Compound 1 exhibits a one-dimensional (1D) double-chain structure built up from the connection of the central Sm(3+) ions with a mixture of bzz and ben ligands. On the other hand, 2 features a 3D network with a 4-connected (6(6)) dia topology constructed from dinuclear [Eu(2)(ben)(6)] secondary building units and bbz linkers. High-pressure CO(2) sorption studies of activated 1 show that maximum uptake increases to exceptionally high values of 376.7 cm(3) g(−1) (42.5 wt%) under a pressure of 50 bar at 298 K with good recyclability. Meanwhile, 2 shows a typical red emission in the solid state at room temperature with the decay lifetime of 1.2 ms.