Luminescent double-decker type guanine octets with trivalent lanthanide cations: in situ self-assembling and stability evaluation in homogeneous organic media
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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DOI：
10.1007/s10847-011-9937-2
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发表时间：
2011-03
影响因子：
2.3
通讯作者：
S. Shinoda;T. Noguchi;M. Ikeda;Y. Habata;H. Tsukube
中科院分区：
文献类型：
--
作者：
S. Shinoda;T. Noguchi;M. Ikeda;Y. Habata;H. Tsukube
在有机介质中，甲硅烷基化鸟嘌呤与三价镧系阳离子（镧系阳离子：鸟嘌呤= 1：8）形成发光的双层八隅体配合物，而脱氨基鸟嘌呤衍生物仅形成1：2的配合物。特征UV/维斯吸收变化、CSI-TOF MS和1H NMR谱证实了八隅体的形成。含Tb ~（3+）的八隅体在鸟嘌呤发色团的光激发下，表现出强烈的绿色发光，发光寿命长。三价镧系元素阳离子比常见的一价和二价金属阳离子更有效地稳定八重态。
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 and1H 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.