论文标题
近场红外纳米光谱揭示了金属有机框架中的客人限制单晶
Near-field infrared nanospectroscopy reveals guest confinement in metal-organic framework single crystals
论文作者
论文摘要
金属有机框架（MOF）可以为分子来宾封装提供出色的孔隙率，可用于在感应，气体储存，药物输送和光电子方面的新兴应用。但是，实现此类应用程序的核心是成功地纳入了局限于主机框架中的功能访客。在这里，我们首次证明了散射型扫描近场光学显微镜（S-SNOM）和纳米折室变换红外（Nanoftir）光谱的可行性，并与密度功能理论（DFT）计算一致，以揭示Geact@Mof Systems的振动特征。探测单个MOF晶体，我们指出了局部分子振动，因此为纳米级的宿主 - 环相互作用提供了新的灯光。我们的策略不仅证实了单晶在多孔宿主框架中的发光宾客分子的成功封装，而且还为纳米级分解的物理和化学识别提供了一种新的方法，用于广泛的框架材料和高级应用的设计器多孔系统。
Metal-organic frameworks (MOFs) can provide exceptional porosity for molecular guest encapsulation useful for emergent applications in sensing, gas storage, drug delivery and optoelectronics. Central to the realisation of such applications however is the successful incorporation of a functional guest confined within the host framework. Here we demonstrate, for the first time, the feasibility of scattering-type scanning near-field optical microscopy (s-SNOM) and nano-Fourier transform infrared (nanoFTIR) spectroscopy, in concert with density functional theory (DFT) calculations to reveal the vibrational characteristics of the Guest@MOF systems. Probing individual MOF crystals, we pinpoint the local molecular vibrations and thus, shed new light on the host-guest interactions at the nanoscale. Our strategy not only confirms the successful encapsulation of luminescent guest molecules in the porous host framework in single crystals, but further provides a new methodology for nanoscale-resolved physical and chemical identification of wide-ranging framework materials and designer porous systems for advanced applications.
