Self-sorting

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  • 文章类型: Journal Article
    多组分超分子材料,它们包含多个表现出不同自分类行为的超分子结构,受到越来越多的关注,因为它们可以用复杂的功能和层次结构来实现,例如,活细胞。然而,应用超分子系统设计在多个超分子结构中设计自分类行为仍然具有挑战性。在这里,我们表明,多个单链DNA和单个半人工糖肽(GP)的热退火诱导的一锅组装导致了整合的自分选超分子纳米结构(ssSNs)的突然形成,该结构由GP超分子纳米带组成被DNA瓦片纳米管包围。荧光成像揭示了通过正交分子组装过程形成每个超分子纳米结构。此外,光漂白后的荧光恢复(FRAP)揭示了DNA瓦片之间存在可逆的吸引相互作用,在形成瓦片纳米管之前,和中尺度水平的GP超分子纳米结构,这对于整合ssSN的形成至关重要。Further,我们发现,整合的ssSNs保留了它们的生物刺激响应性,因此每个超分子纳米结构可以被选择性地降解。最后,我们成功构建了由三元超分子结构组成的复杂软纳米材料(GP超分子纳米结构,DNA瓦片纳米管,和DNA微球)基于当前以及先前的发现。
    Multicomponent supramolecular materials, which comprise plural supramolecular architectures that exhibit distinct self-sorting behaviors, are receiving increasing attention because they can be implemented with sophisticated functions and hierarchical structures, e.g., living cells. Nevertheless, the application of supramolecular system design to engineer self-sorting behaviors among plural supramolecular architectures remains challenging. Herein, we show that the thermal annealing-induced one-pot assembly of multiple single-stranded DNAs and a single semi-artificial glycopeptide (GP) results in the emergent formation of integrative self-sorted supramolecular nanostructures (ssSNs) consisting of a GP supramolecular nanoribbon surrounded by DNA tile-nanotubes. Fluorescence imaging revealed the formation of each supramolecular nanostructure through orthogonal molecular assembling processes. Moreover, the fluorescence recovery after photobleaching (FRAP) disclosed the presence of reversible attractive interactions between the DNA tile, prior to the formation of the tile-nanotube, and the GP supramolecular nanostructures at the mesoscale level, which are crucial for the formation of the integrative ssSNs. Further, we revealed that the integrative ssSNs retain their biostimuli responsiveness so that each supramolecular nanostructure can be selectively degraded. Finally, we successfully constructed a complex soft nanomaterial composed of ternary supramolecular architectures (a GP supramolecular nanostructure, DNA tile-nanotube, and DNA microsphere) based on the present as well as previous findings.
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  • 文章类型: Journal Article
    大自然创造了精致的分子组装,生命的分子水平功能所必需的,通过自组装。理解和利用这些复杂的过程为设计和制造先进的功能材料提供了巨大的机会。然而,由于缺乏关键反应中间体的知识,阻碍了自组装制造高功能材料的显着工业潜力,机制,和动力学。当我们超越共价合成体系时,进入自组装占据的非共价相互作用域,利用和拥抱复杂性是必须的,和动态系统的非目标分析变得越来越重要。协调驱动的自组装是自组装的重要子类型,提出了几个邪恶的分析挑战。这些挑战是“邪恶的”,因为所需的复杂性混淆了产品的分析,中间体,和路径,因此限制了反应优化,调谐,最终,公用事业。离子迁移率-质谱法在分离和分析通过配位驱动的自组装形成的简单和复杂物种的结构中解决了许多最具挑战性的分析问题。因此,由于离子迁移质谱作为处理复杂系统的分析技术的重要性,这篇评论突出了令人兴奋的最新应用。这些包括平衡监测,结构和动态分析以前分析不可访问的复杂互连结构和自排序过程。离子迁移质谱对协调驱动的自组装的巨大且尚未开发的潜力尚未完全实现。因此,我们还提出了可以建立当前分析方法的地方,以更深入地了解自组装中涉及的复杂性和结构动力学。
    Nature creates exquisite molecular assemblies, required for the molecular-level functions of life, via self-assembly. Understanding and harnessing these complex processes presents an immense opportunity for the design and fabrication of advanced functional materials. However, the significant industrial potential of self-assembly to fabricate highly functional materials is hampered by a lack of knowledge of critical reaction intermediates, mechanisms, and kinetics. As we move beyond the covalent synthetic regime, into the domain of non-covalent interactions occupied by self-assembly, harnessing and embracing complexity is a must, and non-targeted analyses of dynamic systems are becoming increasingly important. Coordination driven self-assembly is an important subtype of self-assembly that presents several wicked analytical challenges. These challenges are \"wicked\" due the very complexity desired confounding the analysis of products, intermediates, and pathways, therefore limiting reaction optimisation, tuning, and ultimately, utility. Ion Mobility-Mass Spectrometry solves many of the most challenging analytical problems in separating and analysing the structure of both simple and complex species formed via coordination driven self-assembly. Thus, due to the emerging importance of ion mobility mass spectrometry as an analytical technique tackling complex systems, this review highlights exciting recent applications. These include equilibrium monitoring, structural and dynamic analysis of previously analytically inaccessible complex interlinked structures and the process of self-sorting. The vast and largely untapped potential of ion mobility mass spectrometry to coordination driven self-assembly is yet to be fully realised. Therefore, we also propose where current analytical approaches can be built upon to allow for greater insight into the complexity and structural dynamics involved in self-assembly.
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  • 文章类型: Journal Article
    Nature segregates fundamental tasks such as information storage/transmission and catalysis between two different compound classes (e.g. polynucleotides for replication and folded polyamides for catalysis). This division of labor is likely a product of evolution, raising the question of how simpler systems in which replicators and folded macromolecules co-exist may emerge in the transition from chemistry to biology. In synthetic systems, achieving co-existence of replicators and foldamers in a single molecular network remains an unsolved problem. Previous work on dynamic molecular networks has given rise to either self-replicating fibers or well-defined foldamer structures (or completely un-sorted complex systems). We report a system in which two cross-reactive dithiol (nucleobase- and peptide-based) building blocks self-sort into a replicator fiber and foldamer that both emerge spontaneously and co-exist. The self-sorting behavior remains prevalent across different building block ratios as two phases of emergence occur: replicator growth followed by foldamer formation. This is attributed to the autocatalytic formation of the replicator fiber, followed by enrichment of the system in the remaining building block, which is subsequently incorporated into a foldamer.
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  • 文章类型: Journal Article
    The precise operation of molecular motion for constructing complicated mechanically interlocked molecules has received considerable attention and is still an energetic field of supramolecular chemistry. Herein, we reported the construction of two tris[2]pseudorotaxanes metallacycles with acid-base controllable molecular motion through self-sorting strategy and host-guest interaction. Firstly, two hexagonal Pt(II) metallacycles M1 and M2 decorated with different host-guest recognition sites have been constructed via coordination-driven self-assembly strategy. The binding of metallacycles M1 and M2 with dibenzo-24-crown-8 (DB24C8) to form tris[2]pseudorotaxanes complexes TPRM1 and TPRM2 have been investigated. Furthermore, by taking advantage of the strong binding affinity between the protonated metallacycle M2 and DB24C8, the addition of trifluoroacetic acid (TFA) as a stimulus successfully induces an acid-activated motion switching of DB24C8 between the discrete metallacycles M1 and M2. This research not only affords a highly efficient way to construct stimuli-responsive smart supramolecular systems but also offers prospects for precisely control multicomponent cooperative motion.
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  • 文章类型: Journal Article
    在这项研究中,开发了一种自分类传感器,能够区分不同的压力状态并将压力转换为电信号。具体来说,自分类传感器可以像人体皮肤一样区分软硬压力,没有任何软件帮助和复杂的电路。要实现自排序属性,通过自发化学图案化的全溶液过程制备了类似Janus的锯齿状结构;它们包括半绝缘顶点和高导电谷。这种独特的结构通过在两种状态的当前水平之间提供显著的差距,便于检测和确定压力的强度和类型。类似于纤维在人类触觉系统中的功能。制造的传感器还具有高灵敏度和耐用性以及低功耗,如电子皮肤和三元莫尔斯信号应用所证明的。与传统的可穿戴式压力传感器相比,该传感器无需额外编程即可检测信号;因此,它非常适合延迟敏感,节能传感器应用,如无人驾驶车辆,自主人工智能技术,和假肢装置。
    In this study, a self-sorting sensor was developed with the ability to distinguish between different pressure regimes and translate the pressure to electrical signals. Specifically, the self-sorting sensor can distinguish between soft and hard pressure like the human skin, without any software assistance and complicated circuits. To achieve the self-sorting property, Janus-like jagged structures were prepared via an all-solution process of spontaneous chemical patterning; they comprised electrically semi-insulating vertices and highly conductive valleys. This unique structure facilitates the detection and determination of the intensities and types of pressure by providing a significant gap between the current levels of two types of states, similar to the function of fibers in the human tactile system. The fabricated sensors also exhibit high sensitivity and durability as well as low power consumption, as demonstrated by the electronic skin and ternary Morse signal applications. Compared with conventional wearable pressure sensors, this sensor can detect signals without additional programming; thus, it is highly suitable for delay-sensitive, energy-efficient sensor applications such as driverless vehicles, autonomous artificial intelligence technology, and prosthetic devices.
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  • 文章类型: Journal Article
    手性自分选与自然界中观察到的复杂手性过程密切相关,化学家没有产生具有相当复杂性的人工系统。然而,到目前为止,仅报道了一些纯有机分子的例子,可以控制自分类过程。在这里,我们描述了基于手性TBTQ前体的大立方[8+12]水杨亚胺笼化合物的手性自分选。在23种可能的笼型异构体中,仅观察到形成了对映纯和内消旋笼。已通过单晶X射线衍射明确表征。此外,通过仔细选择溶剂,可以控制内消旋笼的形成。内径为din=3.3-3.5nm,这些笼子是表征最大的有机笼子化合物之一,并显示出非常高的比表面积,最高约为。去溶剂化后1500m2g-1。
    Chiral self-sorting is intricately connected to the complicated chiral processes observed in nature and no artificial systems of comparably complexity have been generated by chemists. However, only a few examples of purely organic molecules have been reported so far, where the self-sorting process could be controlled. Herein, we describe the chiral self-sorting of large cubic [8+12] salicylimine cage compounds based on a chiral TBTQ precursor. Out of 23 possible cage isomers only the enantiopure and a meso cage were observed to be formed, which have been unambiguously characterized by single crystal X-ray diffraction. Furthermore, by careful choice of solvent the formation of meso cage could be controlled. With internal diameters of din =3.3-3.5 nm these cages are among the largest organic cage compounds characterized and show very high specific surface areas up to approx. 1500 m2  g-1 after desolvation.
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  • 文章类型: Published Erratum
    暂无摘要。
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  • 文章类型: Journal Article
    Self-sorting plays a crucial role in living systems such as the selective assembly of DNA and specific folding of proteins. However, the self-sorting of artificial helical polymers such as biomacromolecules has rarely been achieved. In this work, single-handed helical poly(phenyl isocyanide)s bearing pyrene (Py) and naphthalene (Np) probes were prepared, which exhibited interesting self-sorting properties driven by both helicity and molecular weight (Mn ) in solution, solid state, gel, and on the gel surface as well. The polymers with the same helix sense and similar Mn can self-sort and assemble into well-defined two-dimensional smectic architectures and form stable gels in organic solvents. In contrast, mixed polymers with opposite handedness or different Mn were repulsive to each other and did not aggregate. Moreover, the gels of helical polymers with the same handedness and similar Mn can recognize themselves and adhere together to form a gel.
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  • 文章类型: Journal Article
    分子控制论的新兴领域有可能广泛拓宽我们对化学的认识。化学将超越目前主要关注单一转化的焦点,纯化合物,和/或限定的混合物。在这条路上,化学将变得自主,通过通信分子实现网络化和智能化,每个分子都服务于控制工程目的,就像生活机器中的轮子一样。本个人账户描述了我们在这一领域的最新发展。
    The emerging field of molecular cybernetics has the potential to widely broaden our perception of chemistry. Chemistry will develop beyond its current focus that is mainly concerned with single transformations, pure compounds, and/or defined mixtures. On this way, chemistry will become autonomous, networked and smart through communicating molecules each of which serves a control engineering purpose, like the set of wheels in the machinery of life. The present personal account describes our latest developments in this field.
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  • 文章类型: Journal Article
    New results are presented on the multicomponent supramolecular synthesis of pseudo[1]rotaxanes, achieved by designing pairs of structurally matching N-monoalkyl-4,4\'-bipyridinium/2,7-diazapyrenium-based ligands having complementary π-donor/acceptor features, and intended to self-assemble into the targeted supramolecules by following integrative self-sorting processes. In all the studied cases, it was found that the envisioned species, characterized by NMR spectroscopy and MS spectrometry, arise as the main products of the self-assembly in aqueous media by using palladium(II)/platinum(II) metal centers as the guiding force. Crucially, we have also found that by improving the π-donor/acceptor properties of the matching pairs of ligands (L4 and L5 ), the integrative self-sorting processes prevail even in the absence of metallic ions to afford the heterodimeric species with an association constant being 756±43 M-1 .
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