A variety of thermally stable 4-(N, N-diarylamino)-4′-nitroazobenzene dyes can be produced by direct copper-mediated C–N bond formation on preformed amino substituted azo dyes, thus avoiding a troublesome azo coupling step; the products are useful chromophores for high temperature nonlinear optical applications.
![4-[(4-nitrophenyl)diazenyl]-N,N-diphenylaniline结构式](https://image.chemsrc.com/caspic/275/74597-24-3.png)
