Chiral sensing of Eu(III)-containing achiral polymer complex from chiral amino acids coordination induction
作者:Chunhui Dai、Yuxiang Wang、Yiwu Quan、Qingmin Chen、Yixiang Cheng、Chengjian Zhu
DOI:10.1002/pola.27356
日期:2014.11.1
,3‐dionate anion, X = 1, 2, 3] to afford corresponding Eu(III)‐containing polymer complexes. The resulting achiral polymer complex P‐2 (X = 2) can exhibit strong circular dichroism (CD) response toward both N‐Boc‐l and d‐proline enantiomers. The CD signal was preliminarily attributed to coordination induction between chiral N‐Boc‐proline and the Eu(III) complex moiety. The linear regression analysis
β-二酮基非手性聚合物P-1可以通过3,7-二溴-2,8-二甲氧基-5,5-二辛基5 H-二苯并[b,d]甲硅烷基(M1)与(Z)-1,3-双(4-乙炔基苯基)-3-羟基丙烯-1-酮(M2)通过典型的Sonogashira偶联反应。在主链骨架中的β二酮单元P-1可以用Eu(TTA)进一步坐标X [TTA - = 4,4,4-三氟-1-(噻吩-2-基)丁烷-1,3-阴离子,X = 1、2、3],得到相应的含Eu(III)的聚合物络合物。所得的非手性聚合物络合物P-2(X = 2)可以表现出朝向两侧强圆二色性(CD)响应N-的Boc-升和D-脯氨酸对映体。CD信号初步归因于手性N -Boc-脯氨酸与Eu(III)配合物部分之间的配位诱导。的CD传感节目摩尔椭圆和手性的浓度的大小之间具有良好的一致性的线性回归分析N-的Boc-升或D-脯氨酸,这表明这种铕(III)盐的非手性聚合物复合物可以用