Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1-H121 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency , 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan.
Langmuir. 2017 Nov 21;33(46):13415-13422. doi: 10.1021/acs.langmuir.7b03653. Epub 2017 Nov 9.
The ability to chemically synthesize desired molecules followed by their in situ self-assembly in reaction solution has attracted much attention as a simple and environmentally friendly method to produce self-assembled nanostructures. In this study, α-d-glucose 1-phosphate monomers and cellobiose primers were subjected to cellodextrin phosphorylase-catalyzed reverse phosphorolysis reactions in aqueous solution in order to synthesize cellulose oligomers, which were then in situ self-assembled into crystalline nanoribbon network structures. The average degree-of-polymerization (DP) values of the cellulose oligomers were estimated to be approximately 7-8 with a certain degree of DP distribution. The cellulose oligomers crystallized with the cellulose II allomorph appeared to align perpendicularly to the base plane of the nanoribbons in an antiparallel manner. Detailed analyses of reaction time dependence suggested that the production of nanoribbon network structures was kinetically controlled by the amount of water-insoluble cellulose oligomers produced.
通过化学合成所需的分子，然后在反应溶液中进行原位自组装，这种简单且环保的方法吸引了人们的关注，用于生产自组装纳米结构。在这项研究中，α-d-葡萄糖 1-磷酸单体和纤维二糖引发子在水溶液中进行纤维二糖磷酸化酶催化的反向磷酸解反应，以合成纤维素低聚物，然后原位自组装成结晶纳米带状网络结构。纤维素低聚物的平均聚合度（DP）值估计约为 7-8，具有一定的 DP 分布。结晶的纤维素 II 型同晶型似乎以反平行方式垂直于纳米带的基面排列。对反应时间依赖性的详细分析表明，纳米带状网络结构的产生受生成的不溶性纤维素低聚物的量的动力学控制。
