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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This research was supported in part by a Grant-in-Aid for Scientific Research (No. 20245014) from the Japan Society for the Promotion of Science.
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10847_2011_9937_MOESM1_ESM.doc
Supplementary material 1 (DOC 964 kb). Fluorescence and 1H NMR spectral changes of guanine 1 upon addition of La(OTf)3 and Ca(OTf)2, NOE cross peaks between N8 and amide protons in La3+ octet, CSI TOF–MS spectra of guanine octets with K+, Ba2+ and Y3+ cations, luminescence decay profiles of Tb3+ complexes, and 1H and 13C NMR spectra of compounds 1 and 2
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Shinoda, S., Noguchi, T., Ikeda, M. et al. Luminescent double-decker type guanine octets with trivalent lanthanide cations: in situ self-assembling and stability evaluation in homogeneous organic media. J Incl Phenom Macrocycl Chem 71, 523–527 (2011). https://doi.org/10.1007/s10847-011-9937-2
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DOI: https://doi.org/10.1007/s10847-011-9937-2