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Luminescent double-decker type guanine octets with trivalent lanthanide cations: in situ self-assembling and stability evaluation in homogeneous organic media |
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| Authors: | Satoshi Shinoda Takashi Noguchi Mari Ikeda Yoichi Habata Hiroshi Tsukube |
| Institution: | 1. Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan 2. JST, CREST, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan 3. Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba, 274-8510, Japan |
| Abstract: | Silylated guanine formed luminescent double-decker type octet complexes with trivalent lanthanide cations (lanthanide cation : guanine = 1:8) in organic media, while a deaminated guanine derivative gave only 1:2 complexes. The octet formation was evidenced by characteristic UV/Vis absorption changes, CSI-TOF MS and 1H NMR spectra. The octet with Tb3+ showed intense green luminescence with a long lifetime by photo-excitation of the guanine chromophore. The trivalent lanthanie cations stabilized the octets more effectively than common mono- and divalent metal cations. |
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