NHC-AuNPs prepared via chlorido(1,3-dimethyl-N-Boc-O-methylhistidin-2-ylidene)gold(i), an NHC–Au(i) complex, affords AuNPs containing not just Au(0), but also Au(i).

The novel self-assembled zinc(5-acetamidoisophthalate) have been synthesized and characterized by elemental microanalysis, IR spectroscopy, thermogravimetric analysis and X-ray singlecrystal diffraction. 1, 2 and 3 are 1D coordination polymers that crystallize in monoclinic P2 1 , monoclinic P2 1 /m and triclinic P-1 systems, respectively, and are pseudo-polymorphic supramolecular isomers with 1 having a helical arrangement, and 2 and 3 exhibiting zig-zag type structures containing different guest molecules. Compound 4 crystallizes in the triclinic P-1 space group and is a 1D coordination polymer that exhibits fused 8-membered and 16-membered dimetallic rings. Compound 5 features a two-dimensional network type polymer with trimetallic cores. Compounds 1 -5 expand to 3D by means of H-bond interactions. These coordination polymers act as effective heterogeneous catalysts, under mild conditions, for the Knoevenagel condensation reaction of different aldehydes with an active methylene compound (malononitrile) and can be recycled without losing activity.

Five isostructural lanthanide MOFs, [Ln(1κOO',2κO'',3κO''',4κO''''-μ-L)(NO)(DMF)]·n(DMF) {Ln = La (1), Ce (2), Nd (3), Sm (4) and Dy (5); L = 5-[2-{2,4,6-trioxotetrahydropyrimidin-5(2H)-ylidene}hydrazinyl]isophthalate; DMF = N,N'-dimethyl formamide}, based on dicarboxyl-functionalized arylhydrazone of barbituric acid were synthesized under solvothermal conditions. They were characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric and X-ray diffraction analyses. Crystal structure analysis revealed that these frameworks possess a similar type of two dimensional (2D) structure with a dinuclear {Ln(COO)} unit acting as a secondary building block. Topological analysis shows that these frameworks display a 3,6-connected kgd; Shubnikov plane (3.6.3.6)/dual net. They exhibit excellent heterogeneous catalytic activities (compound 2 is the most active one) towards the cyanosilylation of aldehydes under solvent-free conditions. These catalysts can be recycled at least up to five cycles without a loss of activity. Compounds 1-5 exhibit luminescence properties in the solid state at room temperature.

Solvothermal reaction of zinc(II) and copper(II) salts with 3,3′′-dipropoxy-[1,1′:4′,1′′-terphenyl]-4,4′′-dicarboxylic acid (H 2 L) gave rise to the 1D and 2D metal-organic frameworks (MOFs) (4), which were characterized by elemental analysis, FTIR spectroscopy, and X-ray single-crystal diffraction. MOFs 1 and 3 have zigzag-and linear-type 1D structures, respectively, whereas 2 and 4 possess rectangular grid-and layer-type 2D [a] 5557 Figure 4. (A) Schematic representation of 4, (B) one-dimensional chain of Cu II ions bridged by hydroxo and carboxylate anions in the framework 4, and (C) two-dimensional polymeric structure of framework 4. Symmetry codes to generate equivalent atoms: B: ′) -x, 1 -y, 1 -z.