Nie Xiang-Kun, Xu Yi-Ting, Song Zhi-Ling, Ding Ding, Gao Feng, Liang Hao, Chen Long, Bian Xia, Chen Zhuo, Tan Weihong
Molecular Science and Biomedicine Laboratory, State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Changsha, 410082, China.
Nanoscale. 2014 Nov 7;6(21):13097-103. doi: 10.1039/c4nr03837a.
Molecular self-assembly, a process to design molecular entities to aggregate into desired structures, represents a promising bottom-up route towards precise construction of functional systems. Here we report a multifunctional, self-assembled system based on magnetic-graphitic-nanocapsule (MGN) templated diacetylene assembly and photopolymerization. The as-prepared assembly system maintains the unique color and fluorescence change properties of the polydiacetylene (PDA) polymers, while also pursues the superior Raman, NIR, magnetic and superconducting properties from the MGN template. Based on both fluorescence and magnetic resonance imaging (MRI) T2 relaxivity, the MGN@PDA system could efficiently monitor the pH variations which could be used as a pH sensor. The MGN@PDA system further demonstrates potential as unique ink for anti-counterfeiting applications. Reversible color change, strong and unique Raman scattering and fluorescence emission, sensitive NIR thermal response, and distinctive magnetic properties afford this assembly system with multicoded anti-counterfeiting capabilities.
分子自组装是一种将分子实体聚集为所需结构的设计过程，是一种很有前景的自下而上构建功能系统的途径。在此，我们报道了一种基于磁性石墨纳米胶囊（MGN）模板化的二乙炔组装和光聚合的多功能自组装系统。所制备的组装系统保留了聚二乙炔（PDA）聚合物独特的颜色和荧光变化特性，同时还具备来自MGN模板的卓越拉曼、近红外、磁性和超导特性。基于荧光和磁共振成像（MRI）T2弛豫率，MGN@PDA系统能够有效监测pH变化，可用作pH传感器。MGN@PDA系统还展现出作为防伪应用独特墨水的潜力。可逆的颜色变化、强烈且独特的拉曼散射和荧光发射、灵敏的近红外热响应以及独特的磁性，赋予了该组装系统多重编码的防伪能力。
