World Premier International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
Biomacromolecules. 2013 Sep 9;14(9):3223-30. doi: 10.1021/bm400858v. Epub 2013 Aug 6.
In contrast to the success in artificial DNA- and peptide-based nanostructures, the ability of polysaccharides to self-assemble into one-, two-, and three-dimensional nanostructures are limited. Here, we describe a strategy for designing and fabricating nanorods using a regioselectively functionalized cellulose derivative at the air-water interface in a stepwise manner. A semisynthetic chlorophyll derivative, pyro-pheophorbide a, was partially introduced into the C-6 position of the cellulose backbone for the design of materials with specific optical properties. Remarkably, controlled formation of cellulose nanorods can be achieved, producing light-harvesting nanorods that display a larger bathochromic shift than their solution counterparts. The results presented here demonstrate that the self-assembly of functionalized polysaccharides on surfaces could lead the nanostructures mimicking the naturally occurring chloroplasts.
与在人工 DNA 和肽基纳米结构方面的成功形成鲜明对比的是，多糖将自身组装成一维、二维和三维纳米结构的能力有限。在这里，我们描述了一种在空气-水界面上逐步使用区域选择性功能化纤维素衍生物设计和制造纳米棒的策略。半合成叶绿素衍生物，焦脱镁叶绿酸 a，部分引入纤维素主链的 C-6 位，以设计具有特定光学性质的材料。值得注意的是，可实现纤维素纳米棒的可控形成，产生的光收集纳米棒比其溶液对应物具有更大的红移。这里呈现的结果表明，表面上的功能化多糖的自组装可以引导模仿天然叶绿体的纳米结构。
