H. Kersten et P. Boldt, SYNTHESIS AND SOLVATOCHROMISM OF SOME AZO DYES WITH FERROCENE AS ELECTRON-DONOR GROUP FOR OPTICAL-DATA RECORDING, Journal fur praktische Chemie, Chemiker-Zeitung, 338(2), 1996, pp. 129-139
We synthesized the arylazo compounds 3a-c, 5a,b, 5d, 5f, 6b, 6d, 6f, 7
-9 containing ferrocene as electron donor group and different electron
accepters or donors in order to tune the absorption wavelength. Compo
unds 5f, 6f, 8, 9 were incorporated as side chains in liquid crystalli
ne polymers. As holographic experiments showed these materials are not
superior to polymers containing arylazochromophores without the ferro
cene moiety like compounds 10, 11. In addition, the solvatochromism of
the ferrocene azo compounds has been measured as a first test of thei
r first order NLO activity. Only compound 9 showed remarkable values.