Self-assembly of a polythiophene-conjugated glycolipid exclusively produced square sheets a few micrometers on each side. Seventeen hours after the sheets were dispersed in ethanol at 25 °C, they suddenly started to roll up, and eventually they were completely transformed into nanotubes. The onset timing of the roll-up was temperature-dependent. The roll-up involved rearrangement of the molecular packing within the bilayer membranes, which was accompanied by strengthening of the intermolecular hydrogen bonds, alteration of the polythiophene aggregation mode and enhancement of supramolecular chirality due to chiral packing. The nanotubes exhibited not only strong fluorescence derived from J-type aggregation of the polythiophene aromatic moiety but also circularly polarized luminescence (CPL) originating from the left-handed helicity of the polythiophene main chain backbone. Because the CPL onset was concurrent with the sheet roll-up, the CPL onset was also able to be controlled by varying the temperature. Such delayed CPL onset has never been reported in chiral supramolecular structures, in which CPL onset and helicity inversion usually begin immediately upon application of a stimulus and then progress either quickly or gradually. Our findings can be expected to facilitate the development of new stimulus-responsive supramolecular structures that can be used for delayed-action capsules or optical switching devices.

中文翻译：

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聚噻吩片材的时间可控卷起现象，呈现出圆偏振发光的纳米管。

聚噻吩共轭糖脂的自组装专门制造了每边几微米的方片。片材在25°C的乙醇中分散后十七小时，它们突然开始卷起，最终将它们完全转化为纳米管。卷起的开始时间取决于温度。汇总涉及双层膜内分子堆积的重排，其伴随有分子间氢键的增强，聚噻吩聚集模式的改变和由于手性堆积引起的超分子手性的增强。纳米管不仅表现出源自聚噻吩芳族部分的J型聚集的强荧光，而且表现出源自聚噻吩主链骨架的左旋螺旋的圆偏振发光（CPL）。由于CPL起始与板材卷起同时发生，因此CPL起始也可以通过改变温度来控制。从未在手性超分子结构中报道过这种延迟的CPL发作，其中CPL发作和螺旋度反转通常在施加刺激后立即开始，然后迅速或逐渐发展。我们的发现有望促进新的刺激响应超分子结构的开发，该结构可用于延迟作用胶囊或光开关设备。由于CPL的开始与纸张的卷起同时发生，因此CPL的开始也可以通过改变温度来控制。从未在手性超分子结构中报道过这种延迟的CPL发作，其中CPL发作和螺旋反转通常在施加刺激后立即开始，然后迅速或逐渐进展。我们的发现有望促进新的刺激响应超分子结构的开发，该结构可用于延迟作用胶囊或光开关设备。由于CPL的开始与纸张的卷起同时发生，因此CPL的开始也可以通过改变温度来控制。从未在手性超分子结构中报道过这种延迟的CPL发作，其中CPL发作和螺旋反转通常在施加刺激后立即开始，然后迅速或逐渐进展。我们的发现有望促进新的刺激响应超分子结构的开发，该结构可用于延迟作用胶囊或光开关设备。其中，CPL发作和螺旋度反转通常在施加刺激后立即开始，然后迅速或逐渐进行。我们的发现有望促进新的刺激响应超分子结构的开发，该结构可用于延迟作用胶囊或光开关设备。其中，CPL发作和螺旋度反转通常在施加刺激后立即开始，然后迅速或逐渐进行。我们的发现有望促进新的刺激响应超分子结构的开发，该结构可用于延迟作用胶囊或光开关设备。