School of Chemistry, Indian Institute of Science Education and Research (IISER) Thiruvananthapuram, Trivandrum-, 695551, Kerala, India.
Angew Chem Int Ed Engl. 2019 Mar 18;58(12):3865-3869. doi: 10.1002/anie.201813900. Epub 2019 Feb 15.
Crafting of chiral plasmonic nanostructures is extremely important and challenging. DNA-directed organization of nanoparticle on a chiral template is the most appealing strategy for this purpose. Herein, we report a supramolecular approach for the design of DNA-decorated, helically twisted nanoribbons through the amphiphilicity-driven self-assembly of a new class of amphiphiles derived from DNA and hexaphenylbenzene (HPB). The ribbons are self-assembled in a lamellar fashion through the hydrophobic interactions of HPB. The transfer of molecular chirality of ssDNA into the HPB core results in the bias of one of the chiral propeller conformations for HPB and induces a helical twist into the lamellar packing, and leads to the formation of DNA-wrapped nanoribbons with M-helicity. The potential of the ribbon to act as a reversible template for the 1D chiral organization of plasmonic nanomaterials through DNA hybridization is demonstrated.
手性等离子体纳米结构的构建极具挑战性且非常重要。在手性模板上引导纳米颗粒的 DNA 组织是实现这一目标的最具吸引力的策略。在此，我们报告了一种通过 DNA 和六苯并苯（HPB）衍生的一类新两亲分子的亲脂性驱动的自组装设计 DNA 修饰的、螺旋扭曲纳米带的超分子方法。通过 HPB 的疏水性相互作用，这些纳米带以层状方式自组装。ssDNA 的分子手性转移到 HPB 核中，导致 HPB 中一种手性推进器构象的偏置，并诱导层状堆积发生螺旋扭曲，从而形成具有 M 螺旋性的 DNA 包裹纳米带。通过 DNA 杂交，该纳米带作为用于等离子体纳米材料 1D 手性组织的可逆模板的潜力得到了证明。
