Three-Component Regio- and Stereoselective Polymerizations toward Functional Chalcogen-Rich Polymers with AIE-Activities
Three-Component Regio- and Stereoselective Polymerizations toward Functional Chalcogen-Rich Polymers with AIE-Activities
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DOI：
10.1021/jacs.9b06493
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发表时间：
2019-09-18
影响因子：
15
通讯作者：
Tang, Ben Zhong
中科院分区：
文献类型：
--
作者：
Gao, Qingqing;Xiong, Ling-Hong;Tang, Ben Zhong
由于缺乏简便的合成方法，含富硫族元素的聚合物很少报道。本文介绍了一种制备富硫族聚合物的多组分聚合新方法。采用自制的单体在室温下合成了一系列聚乙烯基砜（PVS）。PVS的生成具有高的区域和立体选择性，高产率（高达92.3%）。丰富的硫族元素赋予PVS独特的多功能性。PVSs具有良好的溶解性和成膜性。它们的薄膜在550.0 nm处的折射率高达1.8062，并且在可见光区具有良好的光学透明度。某些聚合物的薄膜也可以通过光刻法制成分辨率良好的荧光染料。由于硒独特的氧化还原性质，通过氧化反应对P1 a/2/3a进行后修饰，成功地消除了所引起的重原子效应，并赋予所得聚合物作为细胞成像荧光生物探针的新功能。
Polymers containing rich chalcogen elements are rarely reported due to the lack of facile synthesis methods. Herein, a novel multicomponent polymerization route toward chalcogen-rich polymers was introduced. A series of poly(vinyl sulfones) (PVSs) were synthesized at room temperature using readily prepared monomers. PVSs were generated with high regio- and stereo-selectivity in high yields (up to 92.3%). Rich chalcogen elements endowed PVSs with distingctive multifunctionalities. The PVSs possessed good solubility and film-forming ability. Their thin films exhibited outstanding refractive indices up to 1.8062 at 550.0 nm together with good optical transparency in the visible region. Thin films of some polymers can also be fabricated into well-resolved fluorescent photopatterns by photolithography. Thanks to the unique redox properties of selenium, postmodification by oxidation reaction of P1a/2/3a successfully eliminates the caused heavy atom effect and endow resulting polymers with novel functionality as fluorescent bioprobes for cellular imaging.