Spectral and Structural Variations of Biomimetic Light-Harvesting Nanotubes.
Spectral and Structural Variations of Biomimetic Light-Harvesting Nanotubes.
复制标题
仿生光捕获纳米管的光谱和结构变化
DOI：
10.1021/acs.jpclett.9b00303
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
J. Köhler
中科院分区：
文献类型：
--
作者：
A. Löhner;T. Kunsel;M. I. S. Röhr;T. L. C. Jansen;S. Sengupta;F. Würthner;J. Knoester;J. Köhler
生物启发，自组装纳米管已经研究了低温，偏振分辨单管光谱。这些组件是基于锌二氢卟酚单体，并被认为是类似于二级结构元素的天然光捕获系统的绿色（非）硫细菌的模型系统。与自然体系相比，从单纳米管光谱中提取的光谱参数具有明显更小的宽度分布，这归因于人工体系中结构异质性的极大降低。采用量子化学分子建模的光谱的个别纳米管可以解释一致，只有一个分子包装模型，是从根本上不同于迄今为止所考虑的自然系统。随后的理论模拟表明，单个纳米管之间的剩余光谱变化可以追溯到单体跃迁偶极矩的相互取向的微小变化，这些变化远远超出了高分辨率电子显微镜成像技术的分辨能力。
Bioinspired, self-assembled nanotubes have been investigated by low-temperature, polarization-resolved single-tube spectroscopy. These assemblies are based on zinc chlorin monomers and are considered as model systems that resemble the secondary structural elements in the natural light-harvesting systems of green (non)sulfur bacteria. Compared to the natural systems, the spectral parameters extracted from the single-nanotube spectra feature distributions with significantly smaller widths, which is ascribed to a tremendous reduction of structural heterogeneity in the artificial systems. Employing quantum chemical molecular modeling the spectra of individual nanotubes can be explained consistently only for a molecular packing model that is fundamentally different from those considered so far for the natural systems. Subsequent theoretical simulations reveal that the remaining spectral variations between single nanotubes can be traced back to small variations of the mutual orientations of the monomer transition dipole moments that are far beyond the resolving power of high-resolution electron microscopy imaging techniques.
影响因子：
64.8
作者：
Haedler, Andreas T.;Kreger, Klaus;Hildner, Richard
通讯作者：
Hildner, Richard