Study of internal structure of meso-tetrakis (4-sulfonatophenyl) porphine J-aggregates in solution by fluorescence microscope imaging in a magnetic field
Study of internal structure of meso-tetrakis (4-sulfonatophenyl) porphine J-aggregates in solution by fluorescence microscope imaging in a magnetic field
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DOI：
10.1021/la061127q
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发表时间：
2006-08-29
期刊：
影响因子：
3.9
通讯作者：
Takazawa, Ken
中科院分区：
文献类型：
--
作者：
Kitahama, Yasutaka;Kimura, Yasuyuki;Takazawa, Ken
为了确定有机染料聚集体的内部分子排列，开发了一种用于观察由磁场中的染料聚集体组成的溶液的荧光显微镜图像的技术。利用该技术，在10 T的磁场中观察了meso-四（4-磺酸基苯基）卟啉（TPPS）J-聚集体在溶液中的荧光图像。观察到单个棒状TPPS聚集体（长度为4-20 μ m）平行于施加的场排列。在10 T的磁场下测量了样品溶液的偏振吸收光谱。的光谱显示的J-带强度的磁场依赖性，反映了聚集体的磁性排列。根据实验得到的磁性和光学性质，提出TPPS J聚集体具有管状结构，由一维分子阵列平行于管状长轴堆叠而成。
To determine the internal molecular arrangement of organic dye aggregates, a technique for observing the fluorescence microscope image of a solution consisting of dye aggregates in a magnetic field was developed. Using this technique, the fluorescence image of meso-tetrakis (4-sulfonatophenyl) porphine (TPPS) J-aggregates in a solution in a magnetic field of 10 T was observed. It was observed that individual rod-shaped TPPS aggregates (4-20 mu m in length) were aligned parallel to the applied field. The polarized absorption spectra of the sample solution were also measured in the fields of up to 10 T. The spectra show the magnetic field dependence of the J-band intensity, reflecting the magnetic alignment of the aggregates. On the basis of the magnetic and optical properties obtained by the experiments, it was proposed that TPPS J-aggregates have a tube-like structure and are constructed from one-dimensional molecular arrays that are stacked parallel to the long axis of the tube.