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首页> 外文期刊>Crystal growth & design >Spontaneous Self-Assembly of a 1,8-Naphthyridine into Diverse Crystalline 1D Nanostructures: Implications on the Stimuli- Responsive Luminescent Behaviour
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Spontaneous Self-Assembly of a 1,8-Naphthyridine into Diverse Crystalline 1D Nanostructures: Implications on the Stimuli- Responsive Luminescent Behaviour

机译：1,8-萘啶自发自组装成不同的晶体1D纳米结构：对刺激响应发光行为的影响。

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摘要

The previously reported organic solid-state fluorophore 7-(3,4- dimethoxyphenyl)-2-ethoxy-4-phenyl-1,8-naphthyridine-3-carbonitrile 1 was found to spontaneously self-organize into diverse 1D crystalline nanostructures by choosing appropriate liquid phase self-assembly conditions. Experimental results, as well as DFT quantum calculations (at the M06-2X/6-31+G(d) level), shed light on the aggregation mechanism. This was found in good agreement with molecules being primarily joined together through intermolecular alignment caused by electrostatic interactions, as well as minimization of the steric repulsions. This alignment provokes the preferential growth of the crystalline materials into 1D aggregates, as well as the observed fluorescence of the material in the solid state. Luminescent nanowires, nanodendrons, and nanodendrimers, obtained following this spontaneous liquid phase self-assembly, have shown a versatile fluorescent behavior. Here, the obtained nanostructured materials showed a blue-shifted emission compared to the previously reported polycrystalline or single crystalline samples of 1 (Pbca), together with thermo- and acido-fluorochromism, plus piezochromic aggregation-induced emission.
机译：发现以前报道的有机固态荧光团7-（3,4-二甲氧基苯基）-2-乙氧基-4-苯基-1,8-萘啶-3-腈1通过选择可以自发自发形成各种1D晶体纳米结构。适当的液相自组装条件。实验结果以及DFT量子计算（在M06-2X / 6-31 + G（d）水平）阐明了聚集机理。发现这与通过静电相互作用引起的分子间排列主要结合在一起的分子以及使空间排斥最小化非常吻合。这种排列激发了晶体材料优先生长为1D聚集体，并观察到了固态材料的荧光。在这种自发液相自组装之后获得的发光纳米线，纳米树枝状结构和纳米树枝状大分子已经显示出通用的荧光行为。在这里，与先前报道的1（Pbca）的多晶或单晶样品相比，所获得的纳米结构材料显示出蓝移发射，同时具有热和酸性氟致变色现象，以及压电致变聚集诱导的发射。

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