Understanding isomer distribution of tF-AZB inside DMOF-1 as a function of host–guest and guest–guest interaction.

The incorporation of photochromic dyes into porous metal–organic frameworks (MOFs) is an attractive way to transfer the photochromic properties of the dye to a solid crystalline material.

Copper-based nanocatalysts are essential for efficient electroreduction of CO2 toward hydrocarbon fuels. Nucleation, growth, and stability of copper nanoclusters on hexagonal boron nitride (h-BN) films on a Pt(110) substrate were studied by scanning tunneling microscopy and spectroscopy. We find that the h-BN/Pt(110) Moiré superstructure has a relatively weak templating effect, visible only at very low coverages of copper. Upon postannealing cluster ripening is observedwith increasing temperature the spherical-cap-like clusters grow in both width and height, preserving a constant aspect ratio. Intercalated islands were never observed, not even after annealing to 970 K. Small copper clusters are found to exhibit a local work function lower than that of low-index single-crystalline copper surfaces.

Growth of Zn on Cu(110) with and without the influence of oxygen was investigated by a combination of scanning tunneling microscopy, low-energy ion scattering, and low-energy electron diffraction in analogy to previous studies on growth and oxidation of Zn on Cu(111). Upon room-temperature deposition of submonolayer Zn films on Cu(110), a step-flow growth mode is observedpossibly accompanied by some intermixingwith Zn atoms adopting the fcc(110) structure of the copper substrate. Upon oxidation of submonolayer Zn films at temperatures around 400–500 K, ill-ordered clusters of oxidized zinc are formed, but the Cu(110) substrate becomes oxidized too. Room-temperature deposition of submonolayer amounts of Zn onto a partly oxidized “striped” Cu(110) surface results in partial destruction of the CuO stripes, formation of ZnO x clusters, and in addition growth of Zn “nanowires” with an fcc(110) structure on the clean copper stripes. On the fully developed (2 × 1)­O template, zinc atoms adopt a geometry reminiscent of the (2 × 1) reconstructed CuO surface.