Rational design and in-situ FTIR analyses of colorimetrically reversibe polydiacetylene supramolecules
Rational design and in-situ FTIR analyses of colorimetrically reversibe polydiacetylene supramolecules
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DOI：
10.1021/ma051551i
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发表时间：
2005-11-01
期刊：
影响因子：
5.5
通讯作者：
Ahn, DJ
中科院分区：
文献类型：
--
作者：
Kim, JM;Lee, JS;Ahn, DJ
衍生自各种功能化二乙炔脂质的聚二乙炔超分子的比色可逆性已经经过详细研究。在早期的研究中，研究表明，由 PCDA-mBzA 1 制备的带有末端间羧基苯基酰胺基的聚二乙炔囊泡在热刺激下表现出完全可逆性 [J.是。化学。苏克。 2003, 125, 8976]。目前的研究已通过使用由 PCDA-mBzA 1 类似物制备的聚二乙炔超分子原位阐明了这些系统中可逆热致变色的起源和性质。与 (1) 内部酰胺基团、(2) 头基芳族相互作用、(3) 疏水烷基链的长度和 (4) 末端羧基对聚二乙炔超分子比色可逆性的影响相关的问题已被调查。结果表明，头基之间良好的氢键和芳香相互作用对于热刺激后共轭 T 电子链长度的完全恢复至关重要。这项综合研究的结果首次使得基于聚二乙炔超分子的可逆比色传感器的合理设计成为可能。
The colorimetric reversibility of polydiacetylene supramolecules, derived from a variety of functionalized diacetylenic lipids, has been subjected to detailed investigation. In an earlier effort, it was shown that polydiacetylene vesicles prepared from PCDA-mBzA 1, bearing terminal m-carboxyphenyl-amido groups, display complete reversibility upon thermal stimulation [J. Am. Chem. Soc. 2003, 125, 8976]. The origin and nature of reversible thermochromism in these systems have been elucidated in-situ in the current studies by using polydiacetylene supramolecules, prepared from analogues of PCDA-mBzA 1. Issues related to the effects of (1) internal amide groups, (2) headgroup aromatic interactions, (3) lengths of the hydrophobic alkyl chains, and (4) terminal carboxylic groups on the colorimetric reversibility of the polydiacetylene supramolecules have been probed. The results demonstrate that well-developed hydrogen-bonding and aromatic interactions between headgroups are essential for complete recovery of the length of the conjugated T-electron chain following thermal stimulus. The results of this comprehensive investigation allow for the first time the rational design of reversible colorimetric sensors based on polydiacetylene supramolecules.