Palladium-Catalyzed Arylations towards 3,6-Diaryl-1,3a,6a-triazapentalenes and Evaluation of Their Fluorescence Properties.

Methyl 4-(1,3a,6a-triazapentalen-3-yl)benzoate () shows interesting properties as a small molecule fluorophore. In the search for post-functionalization methods, palladium-catalyzed arylation reactions were demonstrated. Direct CH arylation reactions of with various aryl halides resulted in 3,6-diaryltriazapentalenes , although mostly in poor yields.

Simultaneous photocatalytic H generation and organic synthesis over crystalline-amorphous Pd nanocube decorated CsBiBr.

CsBiBr decorated with crystalline-amorphous Pd nanocubes as cocatalysts is reported to photocatalytically coproduce 1400 μmol h g of H and benzaldehyde from the selective benzyl alcohol oxidation. This route offers an alternative for photocatalytic H generation using metal halide perovskites under mild conditions.

Metal Halide Perovskite Based Heterojunction Photocatalysts.

With fascinating photophysical properties and a strong potential to utilize solar energy, metal halide perovskites (MHPs) have become a prominent feature within photocatalysis research. However, the effectiveness of single MHP photocatalysts is relatively poor. The introduction of a second component to form a heterojunction represents a well-established route to accelerate carrier migration and boost reaction rates, thus increasing the photoactivity.

BOPAHY: a doubly chelated highly fluorescent pyrrole-acyl hydrazone -BF chromophore.

New easily functionalisable and highly fluorescent BOPAHY chromophores are synthesised via a one-pot two-step reaction starting from commercially available pyrrole-2-carbaldehydes and respective acyl hydrazides in the presence of BF·OEt. Most importantly, all BOPAHY dyes show excellent photophysical properties with quantum yields up to 0.92.