title: [Study on the infrared spectra of 9-methoxy benzoxanthene-3,4-dicarboximide fluorescent dyes].
abstract: 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).
authors.affiliation: State Key Laboratory of Fine Chemicals (Dyes and Surfactants), Dalian University of Technology, 116012 Dalian.
authors.forename: H
authors.initials: H
authors.lastname: Zhang
authors.forename: T
authors.initials: T
authors.lastname: Zhao
authors.forename: B
authors.initials: B
authors.lastname: Wang
authors.forename: D
authors.initials: D
authors.lastname: Zhao
authors.forename: J
authors.initials: J
authors.lastname: Li