Citation: Chuan Fu CHEN, Quan SU, Yong Ming CHEN, Fu XI. Fluorescence Spectra of the Poly (N-vinylcarbazole) Obtained with Asymmetric Polymerization[J]. Chinese Chemical Letters, ;1999, 10(1): 59-62. shu

Fluorescence Spectra of the Poly (N-vinylcarbazole) Obtained with Asymmetric Polymerization

PCLCC Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080

Received Date: 21 May 1998

Fund Project: Financial support by the National Science Foundation of China, Grant N〇.:29774039.

The fluorescence spectra of the poly (N-vinylcarbazole) in solution obtained with chirally organic salts or acid as catalyst or initiator[(-)Sp:(-)-Sparteine, (+)CSA:D- (+)-Camphor-10-sulfonic acid)], respectively, have been investigated. It is found that the two emission peaks at the longer wavelength (λmax,ca, 415nm) and the shorter wavelength (λmax,ca,370nm) are assigned to the sandwich excimer and second excimer (partial overlap) fluorescence, respectively. The sandwich excimer and partially overlapped excimer are attributed to a fully overlapped structure of neighbouring carbazole chromophores in a totally elipsed conformation of the isotactic sequence, and partially overlapped structure of the syndiotactic sequence. The estimated values of I_4l5/I₃₇₀ and isotactic sequence content by using the fluorescence spectra are in the order:(-)Sp⁺ (+)CSA > (+)CSA > (-)Sp⁺C10₄^- (no peak at 415nm for AIBN).
- Fluorescence Spectra,
- poly (N-vinylcarbazole),
- asymmetric polymerization
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