Synthesis and fluorescence properties of butadiyne-linked linear and cyclic carbazole oligomers.

Butadiyne-linked linear and cyclic carbazole oligomers were successfully synthesized. The intensity of the emission band in the 0-0 band of the highly planar macrocyclics decreased compared to that of the 0-1 band. Contrary to this, for larger macrocycles having reduced planarity, the intensity of the emission of the 0-0 band increased as in the cases of the linear compounds.

Selective loading of platinum or silver cocatalyst onto a hydrogen-evolution photocatalyst in a silver-mediated all solid-state Z-scheme system for enhanced overall water splitting.

We selectively loaded a hydrogen (H)-evolution cocatalyst, either platinum (Pt) or silver (Ag), onto a H-evolution photocatalyst, zinc rhodium oxide (ZnRhO), in a Ag-inserted ZnRhO and bismuth vanadium oxide (BiVO) hetero-junction photocatalyst (ZnRhO/Ag/BiVO) by a photo-deposition method. The selective loading of Pt or Ag was achieved by taking advantage of the band-gap difference between ZnRhO (1.2 eV) and BiVO (1.