Light-Harvesting Nanorods Based on Pheophorbide-Appending Cellulose

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• 作者：Keita Sakakibara ; Mari Granstr枚m ; Ilkka Kilpel盲inen ; Juho Helaja ; Santtu Heinilehto ; Rintaro Inoue ; Toshiji Kanaya ; Jonathan P. Hill ; Fumiaki Nakatsubo ; Yoshinobu Tsujii ; Katsuhiko Ariga
• 刊名：Biomacromolecules
• 出版年：2013
• 出版时间：September 9, 2013
• 年：2013
• 卷：14
• 期：9
• 页码：3223-3230
• 全文大小：431K
• 年卷期：v.14,no.9(September 9, 2013)
• ISSN：1526-4602

文摘

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鈥搘ater 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.