Fluorescent Naphthyl- and Anthrylazoles from the Catalytic Coupling of Phenylazoles with Internal Alkynes through the Cleavage of Multiple C-H Bonds

摘要

Polycyclic aromatic and heteroaromatic compounds have attracted considerable attention because of their electrochemical and photochemical properties,and their application as pi-conjugated functional materials such as organic semiconductors and luminescent materials.Polyarylated derivatives with condensed aromatic cores are of particular interest because of their stability,their enhanced ability to transport charge,and their fluorescent properties in the solid-state that are brought about by the aryl groups.Among the interesting examples is 1,3,6,8-tetraphenylpyrene,which was shown to be applicable to organic light-emitting diodes with field-effect transistor characteristics.Recently,more steri-cally congested tetraarylpyrenes were synthesized and their solid-state emission properties were examined.