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A d 10 metal−organic framework ([Hg(Bpbp)(SCN) 2 ] n (CQNU-1, Bpbp = 4,4′-bis(4-pyridyl)biphenyl) has been synthesized and evaluated as a photocatalyst for water splitting. UV−vis spectra and Mott−Schottky analysis indicate that CQNU-1 is a potential photocatalyst with dual functions of hydrogen and oxygen evolution. The results of photocatalytic reactions over CQNU-1 show that, in the presence of a sacrificial agent, the average H 2 and O 2 evolution rates obtained by the pristine CQNU-1 are ∼7.0 and ∼3.4 μmol h −1 during a 9 h test with three cycles, respectively.

The assembly of metal-organic frameworks (MOFs) with metal ions and organic ligands is currently attracting considerable attention in crystal engineering and materials science due to their intriguing architectures and potential applications. A new three-dimensional MOF, namely poly[[diaqua( 8 -para-terphenyl-3,3 0 ,5,5 0 -tetracarboxylato)dizinc(II)] dimethylformamide disolvate monohydrate], {[Zn 2 (C 22 H 10 O 8 )(H 2 O) 2 ]Á2C 3 H 7 NOÁH 2 O} n , was synthesized by the selfassembly of Zn(NO 3 ) 2 Á6H 2 O and para-terphenyl-3,3 0 ,5,5 0 -tetracarboxylic acid (H 4 TPTC) under solvothermal conditions. The compound was structurally characterized by FT-IR spectroscopy, elemental analysis and single-crystal X-ray diffraction analysis. Each Zn II ion is located in a square-pyramidal geometry and is coordinated by four carboxylate O atoms from four different TPTC 4À ligands. Pairs of adjacent equivalent Zn II ions are bridged by four carboxylate groups, forming [Zn 2 (O 2 CR) 4 ] (R = terphenyl) paddle-wheel units. One aqua ligand binds to each Zn II centre along the paddle-wheel axis. Each [Zn 2 (O 2 CR) 4 ] paddle wheel is further linked to four terphenyl connectors to give a three-dimensional framework with NBO-type topology. The thermal stability and solid-state photoluminescence properties of the title compound have also been investigated.

Solvothermal reaction of a copper salt, racemic aspartic acid (AspH3), and 1,2,4-triazole (TaH) leads to a nanoporous copper aspartate, Cu4(Asp)2(Ta)2(H2O)2 · 2H2O (1). The compound was characterized by FT-IR spectroscopy and elemental analysis, and the structure was determined by single-crystal X-ray diffraction. Pairs of l-Asp3− and d-Asp3− ligands in unprecedented μ4-1,2κO:3,4κOκN coordination modes chelate pairs of adjacent copper cations to form a centrosymmetric 8n-membered rectangular pipe, and these pipes are further bridged by copper cations in four directions of the bc plane to form a 3D porous structure with approximately rectangular channels of  ~ 5 × 10 Å2 along the crystallographic a-axis. Along the corners of the rectangular channels, each Ta− ligand connects three adjacent copper cations in a μ3 coordination mode to form the final 3D porous framework with relatively large rectangular channels of  ~ 2 × 8 Å2 along the a-axis. Water molecules reside in these large channels. The thermal stability and solid-state photoluminescence properties of the title compound are also investigated.

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