Polyynes with Aggregation-Induced Emission Characteristics: Synthesis and Their Photonic Properties
Received date: 2016-07-16
Online published: 2016-08-24
Supported by
Project supported by the National Basic Research Program of China (973 Program; 2013CB834701, 2013CB834702), the University Grants Committee of Hong Kong (AoE/P-03/08), the National Natural Science Foundation of China (21490570, 21490574), the Research Grants Council of Hong Kong (604913, 16305014 and 16303815), and the Innovation and Technology Commission (ITC-CNERC14S01). B.Z.T. thanks the support of the Guangdong Innovative Research Team Program (201101C0105067115).
Tetraphenylethene-containing diacetylenes are synthesized and their homopolymerizations are catalyzed by CuCl in o-dichlorobenzene, furnishing linear polyynes in high isolated yields. All polymers possess good solubility in common organic solvents and enjoy high thermal stability. Whereas they are practically non-emissive when molecularly dissolved in good solvents, they become highly emissive when aggregated as nanoparticle suspensions in poor solvents or fabricated into thin films in the solid state, demonstrating a novel phenomenon of aggregation-induced emission. The polymers are highly transparent, allowing almost all light in the entire visible spectral region to transmit through. Thin films of the polymers show high refractive indices (n=1.7787~1.6543) in the wavelength region of 400~1700 nm and very low chromatic aberrations (D'=0.0003). Their n values can be modulated and their thin films can be crosslinked by UV irradiation, generating fluorescent patterns with high resolutions.
Han Ting , Cathy K. W. Jim , Jacky W. Y. Lam , Tang Ben Zhong . Polyynes with Aggregation-Induced Emission Characteristics: Synthesis and Their Photonic Properties[J]. Acta Chimica Sinica, 2016 , 74(11) : 877 -884 . DOI: 10.6023/A16070348
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