期刊
DYES AND PIGMENTS
卷 148, 期 -, 页码 359-367出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2017.09.041
关键词
Poly(para-phenylene)-type polymers; Fluorescence; Conformation; Aggregates; Solid-state oxidative coupling; polymerization
资金
- Nature Science Foundation of Fujian Province [2015J01188]
- Education Department Foundation of Fujian [JAT160112]
- Science and Technology Major Project of Fujian Province [2015YZ001-1]
- Fujian Province Science and Technology Project - School-enterprise cooperation in science and engineering [2016Y4001]
- Special Projects on Development of Marine Hightech Industry in Fujian Province [25 (2015)]
A series of benzene-co-fluorene copolymers were synthesized via solid-state oxidative coupling polymerization using FeCl3 as the oxidation catalyst. The structural characterization results confirm that the products are random copolymers composed of 1,4-linked phenylene units and 2,7-linked fluorene units. All the copolymers exhibited good thermal stability. The DSC and XRD results showed that the crystallization of copolymers increased with the increasing fluorene units in the backbones. The relationships among molecular structure, condensed-state structure, and photophysical properties of these polymers were investigated by UV vis absorption spectroscopy and photoluminescence spectroscopy. The optical properties could be adjusted by using different ratios of fluorene and dibutoxybenzene. Moreover, the polymer concentrations and states affected the emission properties of copolymers. This can be attributed to the change in the effective conjugation length of single polymer and the formation of polymer aggregates and excimers. These unique properties endow the benzene-co-fluorene copolymers with potential applications in optoelectronics. (C) 2017 Elsevier Ltd. All rights reserved.
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