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首页> 外文期刊>Chemistry: A European journal >From bola-amphiphiles to supra-amphiphiles: The transformation from two-dimensional nanosheets into one-dimensional nanofibers with tunable-packing fashion of n-type chromophores
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From bola-amphiphiles to supra-amphiphiles: The transformation from two-dimensional nanosheets into one-dimensional nanofibers with tunable-packing fashion of n-type chromophores

机译：从双性两亲到超两亲：从二维纳米片到具有可调谐堆积n型发色团的一维纳米纤维的转变

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摘要

With a rational design of the supra-amphiphiles, we have successfully demonstrated that not only the dimension of the self-assembled nanostructures, but also the packing fashion of the functional naphthalene diimide (a typical n-type chromophore), can be tuned in a noncovalent way in aqueous solution. Naphthalene diimide is incorporated into a bola-amphiphile as the rigid core, whereas viologen derivatives are used as the hydrophilic head. The bola-amphiphile self-assembles into two-dimensional nanosheets, in which naphthalene diimide adopts a "J-type" aggregation. Water-soluble supramolecular complexation between viologen derivatives and the 8-hydroxypyrene-1, 3, 6-trisulfonic acid trisodium salt is used as a driving force for the formation of the supra-amphiphiles. Upon formation of the supra-amphiphiles, the nanosheets transform into ultralong nanofibers with a close packing of naphthalene diimide. Notably, just by mixing the two building blocks of the supra-amphiphiles in aqueous solution, a dimension-controlled evolution of the nanostructures is formed that leads to a different packing fashion of the n-type functional chromophores, which is facile and environmental friendly.
机译：通过对两亲物的合理设计，我们成功地证明，不仅可以自组装纳米结构的尺寸，而且可以在功能上调节功能性萘二酰亚胺（典型的n型发色团）的堆积方式。在水溶液中以非共价方式存在。萘二酰亚胺作为刚性核被掺入到两性两亲物中，而紫精衍生物被用作亲水性头部。保拉两亲分子自组装成二维纳米片，其中萘二酰亚胺采用“ J型”聚集体。紫精衍生物与8-羟基py-1,3,6-三磺酸三钠盐之间的水溶性超分子络合物被用作形成超两亲物的驱动力。在形成超两亲物时，纳米片转变成具有紧密堆积的萘二酰亚胺的超长纳米纤维。值得注意的是，仅通过在水溶液中混合两个以上两亲物的结构单元，就形成了纳米结构的尺寸控制的演变，这导致了n型功能性发色团的不同堆积方式，这是简便且环境友好的。

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