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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- 作者：Yasutaka Kitahama ; Yasuyuki Kimura ; Ken Takazawa
- 刊名：Langmuir
- 出版年：2006
- 出版时间：August 29, 2006
- 年：2006
- 卷：22
- 期：18
- 页码：7600 - 7604
- 全文大小：259K
- 年卷期：v.22,no.18(August 29, 2006)
- ISSN：1520-5827
文摘
To determine the internal molecular arrangement of organic dye aggregates, a technique for observing the fluorescencemicroscope 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 magneticfield of 10 T was observed. It was observed that individual rod-shaped TPPS aggregates (4-20 
m in length) werealigned parallel to the applied field. The polarized absorption spectra of the sample solution were also measured inthe fields of up to 10 T. The spectra show the magnetic field dependence of the J-band intensity, reflecting the magneticalignment of the aggregates. On the basis of the magnetic and optical properties obtained by the experiments, it wasproposed that TPPS J-aggregates have a tube-like structure and are constructed from one-dimensional molecular arraysthat are stacked parallel to the long axis of the tube.
m in length) werealigned parallel to the applied field. The polarized absorption spectra of the sample solution were also measured inthe fields of up to 10 T. The spectra show the magnetic field dependence of the J-band intensity, reflecting the magneticalignment of the aggregates. On the basis of the magnetic and optical properties obtained by the experiments, it wasproposed that TPPS J-aggregates have a tube-like structure and are constructed from one-dimensional molecular arraysthat are stacked parallel to the long axis of the tube.