Synthesis and fluorescence spectra of oxa[3.n]phenanthrenophanes.
[reaction: see text]. Novel photostable oxa[3.n](3,9)- and [3.3](3,10)phenanthrenophanes (n = 3, 4) bearing trimethylene-type linkage(s) were successfully synthesized by the intramolecular acid-catalyzed etherification of the corresponding precursor diols. syn-Oxa[3.3](3,10)phenanthrenophane afforded the most red-shifted excimer fluorescence (lambda(max) = 432 nm) among the phenanthrenophanes so far prepared.
Nakamura
Yosuke
Y
Department of Nano-Material Systems, Graduate School of Engineering, Gunma University, Tenjin-cho, Kiryu, Japan.
Yamazaki
Takuzo
T
Nishimura
Jun
J