Chiral luminescent lanthanide complexes possessing strong (samarium, SmIII) circularly polarised luminescence (CPL), and their self-assembly into Langmuir-Blodgett films
Chiral luminescent lanthanide complexes possessing strong (samarium, SmIII) circularly polarised luminescence (CPL), and their self-assembly into Langmuir-Blodgett films
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DOI：
10.1039/c9dt02003a
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发表时间：
2019-08-14
影响因子：
4
通讯作者：
Gunnlaugsson, Thorfinnur
中科院分区：
文献类型：
--
作者：
Barry, Dawn E.;Kitchen, Jonathan A.;Gunnlaugsson, Thorfinnur
研究了手性两亲2，6-吡啶二甲酸基配体1和2与不同的Ln(CF3SO3)(3)(Ln=Tb-III，Sm-III，Lu-III，Dy-III)盐在CH3CN中的自组装反应，并用1：3和1：1的Ln：配体物种进行了评价。通过圆二色谱(CD)和圆偏振发光(CPL)测量(对于Tb-III和Sm-III)，得到了(4)G(5/2)-GT；H-6(5/2)和(4)G(5/2)->，(g(Lum)=-0.44和0.29，0.45和-0.23)；Sm中心点1(3)和Sm中心点2(3)的H-6(7/2)跃迁)。当Tb中心点L-3和Sm中心点L-3的朗缪尔-布洛杰特膜显示出稀土元素的发光时，还证实了配合物在空气-水界面形成稳定朗缪尔单分子膜的能力。
The lanthanide directed self-assembly of chiral amphiphilic 2,6-pyridinedicarboxylic acid based ligands 1 and 2 with various Ln(CF3SO3)(3) (Ln = Tb-III, Sm-III, Lu-III, Dy-III) salts was studied in CH3CN and evaluated with the expected 1 : 3 and 1 : 1 Ln : Ligand species forming in solution. Ligand chirality was retained and transferred, as depicted by circular dichroism (CD) and circularly polarised luminescence (CPL) measurements (for Tb-III and Sm-III), to the lanthanide centre upon complexation with high dissymmetry factor values for the Sm-III complexes obtained (g(lum) = -0.44 and 0.29 and 0.45 and -0.23 for the (4)G(5/2) -> H-6(5/2) and the (4)G(5/2) -> H-6(7/2) transitions of Sm center dot 1(3) and Sm center dot 2(3), respectively). The ability of the complexes to form stable Langmuir monolayers at the air-water interface was also established while Langmuir-Blodgett films of Tb center dot L-3 and Sm center dot L-3 exhibited lanthanide luminescent emission.