Fluorescent polymeric aggregates induced by Eu3+ ions and their surface morphologies
Fluorescent polymeric aggregates induced by Eu3+ ions and their surface morphologies
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DOI：
10.1016/j.optmat.2015.03.050
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发表时间：
2015-08
影响因子：
3.9
通讯作者：
Xinzhi Wang;Jian-guo Tang;Qingsong Xu;W. Shen;Yao Wang;Liu Jixian;W. Yanxin;Lin-jun Huang;J. Jiao;Die Wang;Song Yan;L. Belfiore
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文献类型：
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作者：
Xinzhi Wang;Jian-guo Tang;Qingsong Xu;W. Shen;Yao Wang;Liu Jixian;W. Yanxin;Lin-jun Huang;J. Jiao;Die Wang;Song Yan;L. Belfiore
本文提出了一种通过Eu ~（3+）诱导自组装制备荧光聚合物聚集体的新方法。采用可逆加成-断裂链转移（RAFT）聚合法合成了两亲性聚合物配体聚苯乙烯嵌段聚（N-乙烯基吡咯烷酮）（PS-b-PNVP）。Eu 3+离子作为配位交联剂被添加到反应溶液中，以诱导PNVP块内的自组装。Eu 3+离子优先与PNVP片段配位，产生在溶剂中溶解度降低的配位交联网络。由于嵌段共聚物的两亲特性，聚苯乙烯链段在溶液中保持其溶解度。自组装和可逆网络形成的机制进行了讨论。由于Eu 3+离子独特的光学性质，对荧光数据进行了深入分析。将这些聚集体滴涂到硅晶片的表面上，随后调查与硅的界面附近的聚合物形态。这代表了这些自组装荧光聚合物聚集体的光电和光伏应用开发的第一步。
A novel method to prepare fluorescent polymeric aggregates via Eu3+-induced self-assembly is described in this research contribution. The amphiphilic polymeric ligand, polystyrene-block-poly(N-vinylpyrrolidone) (PS-b-PNVP) was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. Eu3+ions that function as coordination crosslinking agents were added to the reactive solution to induce self-assembly within the PNVP block. Eu3+ions preferentially coordinate to PNVP segments, yielding coordinatively cross-linked networks with reduced solubility in the solvent. Polystyrene segments retain their solubility in solution due to the amphiphilic character of the block copolymer. Mechanisms for self-assembly and reversible network formation are discussed. Due to the unique optical properties of Eu3+ions, in-depth analysis of fluorescent data was performed. These aggregates were drip-coated onto the surface of silicon wafers, with subsequent investigation of polymer morphology near the interface with silicon. This represents the initial step in the development of opto-electronic and photovoltaic applications for these self-assembled fluorescent polymeric aggregates.