One-pot Synthesis of Blue-green Emitting Fluorophores

摘要

abstract_textpA series of new "blue to green" chromophores 5-triazolo 1,5-alpha pyrazinepyrrol-2-ones were prepared in high yields and characterised (H-1 and (CNMR)-C-13, X-ray crystallography, elemental analysis, MS, photophysics, and DFT/TDDFT computations (B3LYP)), the aggregation (solution - solid state) of these chromophores caused a blue-shift of similar to 29 nm at room temperature, while shifts of up to similar to 50 nm were observed at 77 K. The quantum yield could reach similar to 20 at 77 K. The similar to ns lifetimes scale indicated fluorescence. This work revealed a novel approach for creating dyes and extended the application of beta-lactam carbenes to the synthesis of complex heterocycles./p/abstract_text