Fibrous architectures and organogels of tris(phenylethynylphenyl)adamantane molecules with amino acid moieties: their solvato-controlled helicity induction.
Fibrous architectures and organogels of tris(phenylethynylphenyl)adamantane molecules with amino acid moieties: their solvato-controlled helicity induction.
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DOI：
10.1002/chir.20964
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发表时间：
2011
期刊：
影响因子：
2
通讯作者：
Masahide Tominaga;I. Azumaya
中科院分区：
文献类型：
--
作者：
Masahide Tominaga;I. Azumaya
非盘状分子通过中心三（苯乙炔基苯基）金刚烷部分之间的π堆积相互作用、丙氨酸部分与酰胺基团之间的氢键相互作用以及非极性正构烷烃中烷基之间的货车德瓦尔斯相互作用自组装形成具有凝胶能力的柱状螺旋聚集体。通过红外光谱、紫外-可见光谱、圆二色光谱和场发射扫描电镜对具有螺旋性的纤维结构进行了结构分析。相比之下，由于在极性EtOH中的疏溶剂相互作用，从金刚烷基三脚架分子观察到纤维结构的形成，这在CD测量中没有显示出可检测的科顿效应，表明在自组装过程中溶剂合物控制的螺旋度的诱导。
Non-disk-shaped molecules self-assembled to form columnar-type helical aggregates with gel ability through π-stacking interactions among the central tris(phenylethynylphenyl)adamantane moieties, hydrogen-bonding interactions among the alanine parts with amide groups, and van der Waals interactions among the alkyl groups in nonpolar n-alkanes. The structural analyses of fibrous architectures with helicity were examined by FTIR, UV-Vis, and circular dichroism (CD) spectroscopy and FE-SEM measurements. In contrast, the formation of fibrous structures was observed from adamantane-based tripodal molecules due to solvophobic interactions in polar EtOH, which showed no detectable Cotton effect in the CD measurement, indicating the induction of solvato-controlled helicity in the self-assembly process.