| 초록 |
Patterned fluorescent images are applicable in displays, optical memory devices, sensors and imaging industries. In this study o-hydroxycinnamates were prepared and their photochemical conversion into coumarins was utilized in fluorescence imaging. The photoconversion was greatly accelerated in the presence of p-toluenesulfonic acid. However, when p-toluenesulfonic acid is used, the patterned images were somewhat unstable. Stable fluorescent images could be obtained by using triphenylsulfonium triflate. The optical properties of the cinnamates were compared with those of the corresponding coumarins. Fluorescence imaging was successfully accomplished by photoirradiation of PMMA films containing the cinnamates. The photoconversion of (E)-o-hydroxycinnamates is promising for the application to fluorescence imaging because there is no necessity for any additional processes such as wet developing and post-exposure bake, coupled with the ease of synthesis of the precursors |
