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首页> 外文期刊>Chemistry: A European journal >On the Helical Motif of the Complexes Created by Association of Helix- Forming Schizophyllan (SPG) and Helix-Forming Polythiophene ACHTUNGTRENUNGDerivatives
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On the Helical Motif of the Complexes Created by Association of Helix- Forming Schizophyllan (SPG) and Helix-Forming Polythiophene ACHTUNGTRENUNGDerivatives

机译：关于螺旋形形成的Schizophyllan（SPG）和螺旋形的聚噻吩ACTHUNGTRENUNG衍生物缔合形成的复合物的螺旋基序

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摘要

p-Conjugated polymers can finely tune their electrical and optical properties in response to their conformational changes. We believe that a deeper understanding of their higherorder structures will stimulate further development of their applications. We had revealed that one helix-forming natural polysaccharide (SPG) and one polythiophene derivative (PT-1) formed a stable one-dimensional complex and in the polythiophene main chain a helical conformation was induced through the dynamic conformational changes. The objective of our present research is to obtain a better mechanistic understanding on the interaction between SPG and polythiophenes. Here we have used particular left- and right-handed helix-forming polythiophene derivatives (d- and l- POWTs, respectively) and studied their influence on the helical motif of the complexes. We observed that SPG interacts with both d- and l-POWTs through their dynamic conformational changes and both d- and l-POWTs form the right-handed co-helical complexes with SPG according to the inherent helical motif of SPG. In addition, it was confirmed that 1) the complexes do not coagulate in aqueous solution, and 2) the exchange in the helical motif can occur only when the polymers experience the denature–renature process. We believe, therefore, that the mechanism of the helical induction of the SPG/POWT complexes is very unique, being different from conventional equilibrium reactions.
机译：p-共轭聚合物可以根据其构象变化来微调其电学和光学性质。我们相信，对其高级结构的更深入的了解将刺激其应用的进一步发展。我们已经揭示了一种螺旋形成天然多糖（SPG）和一种聚噻吩衍生物（PT-1）形成了稳定的一维复合物，并且在聚噻吩主链中通过动态构象变化诱导了螺旋构象。我们当前研究的目的是获得对SPG和聚噻吩之间相互作用的更好的机理理解。在这里，我们使用了特殊的左手和右手螺旋形成聚噻吩衍生物（分别为d-和l- POWTs），并研究了它们对复合物螺旋基序的影响。我们观察到SPG通过其动态构象变化与d-POWT和l-POWT相互作用，并且根据SPG固有的螺旋基序，d-POW和L-POWT与SPG形成右旋共螺旋复合体。此外，已证实1）配合物在水溶液中不凝结，2）仅当聚合物经历变性-复性过程时，螺旋基序的交换才能发生。因此，我们认为，SPG / POWT配合物的螺旋诱导机理非常独特，与常规的平衡反应不同。

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