[Study on the infrared spectra of 9-methoxy benzoxanthene-3,4-dicarboximide fluorescent dyes].
The characteristic infrared spectra of eight novel 9-methoxy benzoxanthene-3, 4-dicarboximide fluorescent dyes was studied and the substiuent influences on the spectrum nature was also pointed out. The nature of N-substituent group in the imide ring affects the position of v(c=o) by mesomeric and inductive effects. Imides give the rise to two vc=o absorptions, namely v(a)(c=o) and v(as)(c=o) (1600-1700cm(-1)). The separations between v(a)(c=)o and v(as)(c=o) were about 36-43cm(-1).
Zhang
H
H
State Key Laboratory of Fine Chemicals (Dyes and Surfactants), Dalian University of Technology, 116012 Dalian.
Zhao
T
T
Wang
B
B
Zhao
D
D
Li
J
J