Soft materials '/> “Rigid” Luminescent Soft Materials: Europium-Containing Lyotropic Liquid Crystals Based on Polyoxyethylene Phytosterols and Ionic Liquids
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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >“Rigid” Luminescent Soft Materials: Europium-Containing Lyotropic Liquid Crystals Based on Polyoxyethylene Phytosterols and Ionic Liquids
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“Rigid” Luminescent Soft Materials: Europium-Containing Lyotropic Liquid Crystals Based on Polyoxyethylene Phytosterols and Ionic Liquids

机译：“刚性”发光柔软材料：含铕的喉液晶，基于聚氧乙烯植物甾醇和离子液体

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摘要

Soft materials of europium β-diketonate complexes constructed in lyotropic liquid crystals (LLCs) mediated by ionic liquids (ILs) are impressive for their excellent luminescence performance and stability. For the aim to further improve their mechanical processability and luminescent tunablility, the polyoxyethylene phytosterols (BPS-n) were introduced here as structure directing agents to prepare relatively “rigid” lamellar luminescent LLCs in 1-butyl-3-methyl-imidazolium hexafluorophosphate by doping europium β-diketonate complexes with different imidazolium counterions. As a result of the solvophobic sterol ring structure of BPS-n, the more effective isolation and confinement effects of europium complexes could be achieved. The longest fluorescence lifetime and the highest quantum efficiency reported so far for europium containing lyotropic organized soft materials were thus obtained. Changing the molecular structures of BPS-n with different oxyethylene chains or doped complexes with imidazolium counterions of different alkyl chain lengths, the spacings of lamellar LLC matrixes and position of dispersed complexes became tunable. The measured luminescent and rheological properties for such composite LLCs showed a dependence on the rigidity and isolation capability afforded by sterol molecules. It was also found that the increase of counterion alkyl chain length would weaken the LLC matrix’s confinement and isolation effects and therefore exhibit the deteriorated luminescence performance. The enhanced luminescence efficiency and stability of doped BPS-n LLCs reflected the excellent segregation of europium complexes from each other and therefore the reduced self-quenching process. The obtained results here present the designability of LLC matrixes and their great potential to promote achieving the luminescence tunability of soft materials.]]>
机译：<！[cdata [ src ='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpcbfk/2017/jpcbfk.2017.121.issue-39/acs.jpcb.7b07653/ 20170929 / Images / Medium / JP-2017-07653A_0008.GIF“>在由离子液体（ILS）介导的胞层液晶（LLC）中构建的铕β-DikeTonate络合物的软材料令人印象深刻的发光性能和稳定性。为了进一步提高其机械加工性和发光滴度，这里将聚氧乙烯植物甾醇（BPS-1> N）作为结构引导剂在1-丁基-3中制备相对“刚性”的层状发光LLC。 - 用不同的咪唑芯抗掺杂铕β-二通酸盐络合物甲基 - 咪唑鎓六氟磷酸钙。由于BPS- N 的溶剂型甾醇环结构，可以实现更有效的隔离和抑制效应。由此获得最长的荧光寿命和含铕的铕的荧光效率最高的荧光寿命和最高量子效率。用不同的氧乙烯链或掺杂络合物改变具有不同烷基链长度的咪唑沉积物的掺杂络合物的分子结构，层状LLC基质的间距和分散的配合物的位置可调谐。用于这种复合物体LLC的测量的发光和流变性质显示出甾醇分子提供的刚性和分离能力的依赖性。还发现，反压缩烷基链长度的增加将削弱LLC基质的限制和分离效果，因此表现出劣化的发光性能。增强的发光效率和掺杂BPS- N LLC的稳定性反射了铕络合物的优异偏析，因此减少了自淬火过程。这里获得的结果介绍了LLC基质的可设计性及其促进促进软材料的发光可调性的巨大潜力。]]>

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