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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Direct Formation of Carbocyanine J-Aggregates in Organic Solvent
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Direct Formation of Carbocyanine J-Aggregates in Organic Solvent

机译：在有机溶剂中直接形成碳菁J-骨料

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摘要

J-aggregates are molecular nanoscale self-assemblies with distinct excitonic properties, such as highly delocalized excitons, making them main candidates for designing excitonic energy transfer systems. Here, we show a technique to form J-aggregates of the cyanine dye 1,1'-dioctyl-3,3'-di(4sulfobutyl)-5,5',6,6' -tetrachloro-benzimidazo-locarbocyanine (C8S4) in organic solutions of chloroform and acetone. These J-aggregates have a spectrum with three red-shifted absorption peaks and two sharp emission peaks. Spin-coated thin films of C8S4 aggregates have similar spectra. Investigation of the thin films via electron microscopy shows two morphologies of aggregates, which partially explains the complicated spectra. We have shown two ways for isolating the type of aggregate with the lowest transition energy. Atomic force microscopy and high-resolution transmission electron microscopy images of the aggregates reveal a 2D brickstone arrangement. Finally, J-aggregating C8S4 from organic solvent will enable mixing J-aggregates directly with various fluorescent organic compounds, thereby expanding the options for designing energy transfer systems based on J-aggregates.
机译：J-骨料是分子纳米级自组装，具有不同的激子性质，例如高度分层的激子，使它们成为设计激动能源转移系统的主要候选者。在此，我们显示一种技术以形成花青染料1,1'-二辛基-3,3'-di（4磺酰丁基）-5,5'，6,6'-etThloro-benzimidazo-locarboyyanine（C8S4）的j-二聚体在氯仿和丙酮的有机溶液中。这些J-聚集体具有三个红移吸收峰和两个尖锐的发射峰的光谱。 C8S4聚集体的旋涂的薄膜具有相似的光谱。通过电子显微镜检查薄膜显示两种聚集体的形态，其部分解释了复杂的光谱。我们已经示出了两种方法，用于将骨料类型与最低过渡能量隔离。聚集体的原子力显微镜和高分辨率透射电子显微镜图像显示了2D砖石布置。最后，来自有机溶剂的J-聚集C8S4将能够直接将J-聚集体与各种荧光有机化合物混合，从而扩展基于J-聚集体的设计能量转移系统的选项。

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