Self-Assembly of Bolaamphiphiles into 2D Nanosheets via Synergistic and Meticulous Tailoring of Multiple Noncovalent Interactions
Self-Assembly of Bolaamphiphiles into 2D Nanosheets via Synergistic and Meticulous Tailoring of Multiple Noncovalent Interactions
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通过协同和细致的多重非共价相互作用将 Bola 两亲物自组装成二维纳米片
DOI：
10.1021/acsnano.0c09693
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发表时间：
2021
期刊：
影响因子：
17.1
通讯作者：
Lin, Zhiqun
中科院分区：
文献类型：
--
作者：
Li, Zili;Lin, Zhiqun
bolaamphiphile拥有疏水骨架和两个亲水组两端代表一个重要的构建模块向丰富多样的自组装材料用于离子运输、光电设备和药物和基因传递。在此，我们报告了一步合成一系列合理设计的阴离子亲水亲和物，并通过一组相互作用的异步和细致剪裁，揭示了阴离子亲水亲和物的分子结构与其不同的自组装之间的关系。有趣的是，通过精细地调节这些超分子相互作用之间的相互作用，二维（2D）纳米片被制造成阴离子亲水分子的自组装。特别是，单层二维纳米片是通过芳香π -π堆叠、疏水、氢键和静电斥力相互作用的协同作用形成的。相反，将亲水分子的阴离子头基选择性地转化为非极性烷基链，可以屏蔽邻近亲水分子之间的静电斥力，同时保持亲水分子的其他部分完整，从而使它们能够自组装成多层二维纳米片。有趣的是，带内在电荷的二维纳米片可以通过静电吸引固定带相反电荷的金属纳米颗粒。从概念上讲，阴离子型亲bolaamphiphile衍生的2D纳米片可以作为基底来定位各种纳米晶体和共轭聚合物，在催化、光学器件和光热治疗中有广泛的应用。
A bolaamphiphile possessing a hydrophobic skeleton and two hydrophilic groups at both ends represents an important class of building blocks toward a rich variety of self-assembled materials for use in ion transport, optoelectronic devices, and drug and gene delivery. Herein, we report aone-stepsynthesis of an array of rationally designed anionic bolaamphiphiles and unravel the correlation between molecular structure of anionic bolaamphiphiles and their disparate self-assembliesviasynergistic and meticulous tailoring of a set of interactions. Intriguingly, by delicately regulating the interactions among these supramolecular interactions, two-dimensional (2D) nanosheets are craftedviaself-assembly of anionic bolaamphiphiles. Particularly, single-layered 2D nanosheets are formed through the synergy of aromatic π–π stacking, hydrophobic, hydrogen-bonding, and electrostatic repulsion interactions. In contrast, the selective converting of anionic headgroups of bolaamphiphiles into nonpolar alkyl chain screens the electrostatic repulsion between neighboring bolaamphiphiles while keeping the other segments of bolaamphiphiles intact, thereby allowing them to self-assemble into multilayered 2D nanosheets. Interestingly, the intrinsically charged 2D nanosheets could anchor oppositely charged metal nanoparticlesviaelectrostatic attraction. Conceptually, anionic bolaamphiphile-derived 2D nanosheets may function as a substrate to position a diversity of nanocrystals and conjugated polymers for a broad range of applications in catalysis, optical devices, and photothermal therapy.