期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 51, 期 22, 页码 4752-4764出版社
WILEY
DOI: 10.1002/pola.26897
关键词
conjugated polymers; hyperbranched; luminescence; porous materials; structure-property relationships
资金
- National Basic Research Program of China (973 Program) [2013CB834701]
- Research Grants Council of Hong Kong [604913, 604711, 602212, HKUST2/CRF/10, N_HKUST620/11]
- University Grants Committee of HK [AoE/P-03/08]
- Guangdong Innovative Research Team Program [201101C0105067115]
A tetraphenylethene-containing A(4)-type tetrayne, named 1,1,2,2-tetrakis(4-ethynylphenyl)ethene is synthesized and its TaCl5-Ph4Sn catalyzed homopolycyclotrimerization affords hyperbranched poly(tetraphenylethene) with high molecular weight (M-w=280,000) in high yield (97%). The polymer shows good solubility and high thermal stability. It is aggregation-enhanced emission (AEE)-active and functions as a fluorescent chemosensor for explosive detection with a superamplification effect and large quenching constants up to 758,000 M-1. The polymer shows high and tunable refractive indices (RI=1.9288-1.6746) in a wide wavelength region. Porous fluorescent polymer thin film is prepared by breath figure (BF) methods and real-time monitoring of the elusive BF formation process is realized. Photolithography of the thin films readily generates well-resolved fluorescent photopattern without and with porous secondary structure. The polymer is metallified and pyrolysed to give magnetic ceramics with high magnetic susceptibilities (M-s=83 emu/g) and near-zero coercivity (H-c=0.08 kOe). (c) 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 4752-4764
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