Synthesis and Optical Properties of Novel Conjugated Rigid-Rod Polymer Derived from Fluorene and Benzobisoxazole
writer：Xiaoyun Liu, Xiaohui Xu, Qixin Zhuang, Zhewen Han
keywords：Optical Properties, Conjugated Polymer, Fluorene, Benzobisoxazole
source：期刊
specific source：Polymer Bulletin, 2008, 60: 765-774
Issue time：2008年
A kind of new conjugated rigid-rod polymer poly(9,9-dioctyl fluorenol benzobisoxazole) (PBOF) containing an fluorene and benzobisoxazole structure was prepared by the 4,6-diamino-1,3-benzenediol dihydrochloride (DAR) and 9,9-dioctyl
fluorene. The polymer was characterized by the elemental analysis, 1HNMR, FTIR, thermogravimetric analysis (TGA) and photoluminescence (PL) spectra. The results indicated that the thermal stability of polymer was much lower than that of wellknown poly(p-phenyl benzobisoxazole) (PBO). Unlike PBO, PBOF was readily soluble at room temperature in DMSO and NMP and even partly dissolved in mcresol and CHCl3 due to the introduction of alkyl groups. The absorption and
photoluminescence spectra of the polymer were also studied. The protonated PBOF in dilute methanesulfonic acid solutions exhibits a blue emission with a peak at 468 nm. In contrast with that of PBO, the maximal emissions spectra and absorption spectra of PBOF red-shifted due to the introduction of the fluorene group which enhanced effective conjugation of polymer structure unit.