Tani Katsuhiko, Ito Chizuru, Hanawa Yasuhiro, Uchida Mamoru, Otaguro Kunihiko, Horiuchi Hiroaki, Hiratsuka Hiroshi
Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.
J Phys Chem B. 2008 Jan 24;112(3):836-44. doi: 10.1021/jp077088o. Epub 2008 Jan 3.
By use of electrostatic interactions of dye molecules and poly(diallyldimethylammonium chloride) (PDDA), the spin-coating technique has been successfully applied to the preparation of stable J-aggregate thin films of thiacarbocyanine dyes on a polycarbonate or quartz plate. The J-aggregate thin films were prepared by the spin-coating of PDDA aqueous solution on dye thin films prepared on a substrate by the spin-coating of 2,2,3,3-tetrafluoro-1-propanol solution of dyes. Photophysical properties of the dye thin films and J-aggregate thin films were studied by measuring the fluorescence spectra, quantum yields, and lifetimes. Coherent size of the J-aggregates was estimated to be 3-12 by means of the absorption bandwidth (full width at half maximum) or radiative lifetime. Photostability of the J-aggregate thin films was also studied in terms of photodegradation efficiency under argon and oxygen in comparison with the dye thin films, and J-aggregate thin films were found to be more stable than the corresponding dye thin films.
利用染料分子与聚二烯丙基二甲基氯化铵（PDDA）的静电相互作用，旋涂技术已成功应用于在聚碳酸酯或石英板上制备稳定的硫代碳菁染料J-聚集体薄膜。J-聚集体薄膜是通过将PDDA水溶液旋涂在通过染料的2,2,3,3-四氟-1-丙醇溶液旋涂在基底上制备的染料薄膜上而制备的。通过测量荧光光谱、量子产率和寿命来研究染料薄膜和J-聚集体薄膜的光物理性质。通过吸收带宽（半高宽）或辐射寿命估计J-聚集体的相干尺寸为3-12。还与染料薄膜相比，在氩气和氧气中根据光降解效率研究了J-聚集体薄膜的光稳定性，发现J-聚集体薄膜比相应的染料薄膜更稳定。
