期刊
POLYMER CHEMISTRY
卷 5, 期 2, 页码 372-381出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3py01021j
关键词
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资金
- National Natural Science Foundation of China [91127032, 21174035]
- Zhejiang Provincial Natural Science Foundation of China [Y4100287]
- Program for Changjiang Scholars and Innovative Research Team in Chinese University [IRT 1231]
- Excellent Young Teachers in Zhejiang Province and Hangzhou Normal University [HNUEYT 2011-01-019]
- Opening Foundation of Zhejiang Provincial Top Key Discipline [20121109]
- Zhejiang Province's Xinmiao Talent Plan
A group of novel polyacetylenes containing BODIPY pendants have been synthesized in satisfactory yield using a [Rh(nbd)Cl](2)-Et3N catalyst. The pendant BODIPY unit has been directly conjugated to the polyacetylene backbone either through the 8 position of the BODIPY cores in P1, or through the 3 position in P2 and P3. Their optoelectronic properties have been investigated by UV-vis, FL, CV and Z-scan techniques. Interestingly, the spectroscopy results show that little electronic interaction exists between the BODIPY chromophoric units and the polyacetylene main chain for P1. However, the electronic interaction between the side pendant and the main chain becomes notable for P2 and P3, resulting in a significant broadening and red-shift of their UV-vis absorption and fluorescence emission wavelengths in comparison with those of their respective monomers. The polymers display thermal stabilities and nonlinear optical properties that are dependent on the connectivities of the BODIPY pendants and the polyacetylene backbones. P1 exhibits relatively better thermal stability and poorer nonlinear optical properties than P1 and P2. The third-order nonlinear optical coefficient (chi((3))) of P1 is 8.5 x 10(-12) esu, which is shown to be similar to 5 times smaller than those of P2 and P3.
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