Triple Thermoresponsiveness of a TADDOL-Based Homopolymer through the Formation of Supramolecular Complexes with Chiral Guest Molecules at Variable Ratios,ACS Applied Polymer Materials

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Triple Thermoresponsiveness of a TADDOL-Based Homopolymer through the Formation of Supramolecular Complexes with Chiral Guest Molecules at Variable Ratios
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-08-27 , DOI: 10.1021/acsapm.0c00491
Masami Naya ₁ , Kenta Kokado _{2,

3} , Kazuki Sada _{1,

4}

Affiliation

Multi-thermoresponsiveness which exhibits more than triple phase transitions has not been achieved yet. Current research studies have reported double thermoresponsive copolymers having two kinds of polymer chains. However, the molecular design strategy of triple thermoresponsiveness remains unclear. Herein, we report a triple thermoresponsive chiral homopolymer which exhibits UCST–LCST–UCST-type phase transitions. The polymer contains the α,α,α′,α′-tetraaryl-2,2-disubstituted 1,3-dioxolane-4,5-dimethanol moiety in the side chains, where multiple supramolecular complexes between the host polymer and guest molecules are formed. The formations and dynamic changes in the multiple complexes of model compounds were monitored by ¹H NMR spectroscopy. We concluded that the key factor of the triple thermoresponsive behavior is the stoichiometric change in the multiple complexes. This work can extend the molecular design of the thermoresponsive polymer and lead to the next stage of functional polymer materials.

中文翻译：

通过形成具有可变比率的手性客体分子的超分子复合物，TADDOL基均聚物的三重热响应性

还没有实现表现出超过三相转变的多热响应性。当前的研究已经报道了具有两种聚合物链的双重热响应共聚物。然而，三重热响应性的分子设计策略仍不清楚。在这里，我们报告了一种三重热响应手性均聚物，它表现出UCST–LCST–UCST型相变。该聚合物在侧链中包含α，α，α'，α'-四芳基-2,2-二取代的1,3-二氧戊环-4,5-二甲醇部分，其中主体聚合物和客体分子之间存在多个超分子复合物形成。通过¹监测模型化合物的多种配合物的形成和动态变化1 H NMR光谱。我们得出结论，三重热响应行为的关键因素是多种配合物中的化学计量变化。这项工作可以扩展热敏聚合物的分子设计，并进入功能聚合物材料的下一阶段。

更新日期：2020-08-27

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