| 초록 |
The Er 3+ion shows an intra 4f shell transition from 4I13/2 to 4I15/2, which occurs at a wavelength of 1.54 μm as one of the standard telecommunication. This transition is rather sharp, and the luminescence lifetime can be as long as several milliseconds. These features make them very attractive for lasers and optical amplifiers. But, the erbium cations have the poor solubility in conventional inorganic/organic media. When higher doping concentration was introduced, clustered Er 3+ species cause the reduction of luminescent property. To circumvent the solubility and maximize the luminescent properties, we have designed and studied the erbium-cored supramolecular complexes based on porphyrins. We synthesized 5,10,15-triphenyl-20-(4-methoxycarbonylphenyl)porphyrin and 5,10,15-trimesityl-20-(4-methoxycarbonyl- phenyl)porphyrin by the acid-catalyzed condensation of dipyrromethanes and aldehyde. And then, we introduced the carboxylic acid as the binding site by hydrolysis. We try to several different synthetic methods to prepare Er-cored supramolecular complexes based on porphyrins. The synthesized complexes were characterized by the FT-IR, ICP, UV-Vis and near IR emission spectrospcopies. Also, we synthesized the Er-chelated complexes based on aryl ether dendritic porphyrins to enhance the amplification properties. In this presentation, we will discuss synthetic method and luminescent properties of the Er-cored supramolecular complexes based on porphyrins. |
