Based on the ionic self‐assembly (ISA) strategy, disparate morphologies of 4′‐bis(trimethylammoniumhexyloxy)azobenzene dibromide (BTHA)/naphthalene sulfonic acid sodium (NSA) supra‐amphiphilic aggregates were obtained by regulating the substituent position in the counterions, viz. 1D dendritic structures for BTHA/1‐NSA and 2D rhombus plate‐like structures for BTHA/2‐NSA. Nuclear Magnetic Resonance (NMR) and elemental analysis reveal the same molar ratio (1:2) of the supra‐amphiphiles. Fourier transform infrared (FTIR), UV‐vis absorption spectroscopy, and X‐ray diffraction (XRD) measurements demonstrate their distinct molecular arrangement style. The quantum chemistry calculation results based on Gaussian and MOPAC2016 manifest the inner conformation and energy discrepancy of supramolecular materials. With UV light irradiation, the morphology and fluorescence property of the supra‐amphiphilic aggregates changed remarkably. Meanwhile, the supramolecular structures show photo‐stability with alternate UV and visible light irradiation, accompanied with a position shift of the maximum fluorescence intensity, which has potential for application in optical fields. In this work, the substituent position‐effect was unveiled to mediate the morphologies and consequent fluorescence properties for supramolecular materials, which is anticipated to offer a reference for subsequent rational design of functional materials.

中文翻译：

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光响应性超两亲性聚集体具有不同的形态和荧光特性，其介导的两亲性两性离子的取代位置介导。

根据离子自组装（ISA）策略，通过调节反离子中的取代基位置，获得了4'-双（三甲基铵己氧基）偶氮苯二溴化物（BTHA）/萘磺酸钠（NSA）超两亲性聚集体的不同形态，即 BTHA / 1-NSA的一维树突结构和BTHA / 2-NSA的2D菱形板状结构。核磁共振（NMR）和元素分析显示，超两亲分子的摩尔比相同（1：2）。傅里叶变换红外（FTIR），紫外可见吸收光谱和X射线衍射（XRD）测量证明了它们独特的分子排列方式。基于高斯和MOPAC2016的量子化学计算结果表明超分子材料的内部构象和能量差异。用紫外线照射，两亲性聚集体的形态和荧光性质发生了显着变化。同时，超分子结构在紫外线和可见光交替照射下表现出光稳定性，并伴随着最大荧光强度的位置偏移，这在光学领域具有潜在的应用前景。在这项工作中，揭示了取代基的位置效应，以介导超分子材料的形貌和随后的荧光性质，这有望为功能材料的后续合理设计提供参考。具有在光学领域的应用潜力。在这项工作中，揭示了取代基的位置效应，以介导超分子材料的形貌和随后的荧光性质，这有望为功能材料的后续合理设计提供参考。具有在光学领域的应用潜力。在这项工作中，揭示了取代基的位置效应，以介导超分子材料的形貌和随后的荧光性质，这有望为功能材料的后续合理设计提供参考。