Reversible conformational switching of a photo-responsive ortho-azobenzene/2,6-pyridyldicarboxamide heterofoldamer.

Reversible conformational switching of a photo-responsive ortho-azobenzene/2,6-pyridyldicarboxamide heterofoldamer.
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光响应性邻偶氮苯/2,6-吡啶二甲酰胺杂折叠体的可逆构象转换。

DOI:
10.1039/d3ob01137b
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发表时间:
2023
影响因子:
3.2
通讯作者:
Pike SJ
Pike SJ
中科院分区:
化学3区
文献类型:
--
作者:
Pike SJ

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我们报道了一种方便的合成路线,以快速获得一种新的光响应性邻偶氮苯/2,6-吡啶二甲酰胺杂折叠体。通过一个稳定的螺旋构象已经建立了这种支架在固态和溶液中,分别使用单晶X-射线衍射和圆二色性(CD)光谱。已经确定了对刺激驱动的超分子支架的结构重新排序的可逆控制,从非辐照条件下的稳定螺旋构象到辐照条件下的较不有序的状态。已确定使用UV/维斯,1H NMR和CD光谱的响应,构象,分子切换行为的鲁棒性。观察到折叠体支架的刺激驱动的结构重新排序过程的效率的最小损失,即使在用辐照/非辐照条件进行多次循环处理时也是如此。
We report on a convenient synthetic route to rapidly access a new photo-responsive ortho-azobenzene/2,6-pyridyldicarboxamide heterofoldamer. The adoption of a stable helical conformation has been established for this scaffold in both the solid state and in solution using single crystal X-ray diffraction and circular dichroism (CD) spectroscopy respectively. Reversible control over the stimuli-driven structural re-ordering of the supramolecular scaffold, from a stable helical conformation under non-irradiative conditions, to a less well-ordered state under irradiative conditions, has been identified. The robust nature of the responsive, conformational, molecular switching behaviour has been determined using UV/Vis, 1H NMR and CD spectroscopy. Minimal loss in the efficiency of the stimuli-driven, structural re-ordering processes of the foldamer scaffold is observed, even upon multiple cyclic treatments with irradiative/non-irradiative conditions.
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