Ultrafast Energy Transfer in a Multichromophoric Layered Silicate
Ultrafast Energy Transfer in a Multichromophoric Layered Silicate
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DOI：
10.1021/jp910341f
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发表时间：
2010-01-21
影响因子：
3.7
通讯作者：
Sakoda, Kazuaki
中科院分区：
文献类型：
--
作者：
Kuroda, Takashi;Fujii, Kazuko;Sakoda, Kazuaki
利用新型有机/无机合成方法，我们实现了发色团的二维定位，这些发色团被限制在用有机烷氧基硅烷前体合成的发光硅酸盐纳米膜的层间。时间分辨的光致发光表现出有效的能量转移从供体染料（香豆素）到受体染料（花青）的特征时间小于5 ps。在受主发射衰变中也证实了与光子的发射和再吸收有关的缓慢辐射能量转移的共同存在。对慢能量转移和快能量转移的相对效率进行了定量，发现其依赖于分子浓度。
Making use of novel organic/inorganic synthesis, we achieved two-dimensional positioning in chromophores, which were confined to the interlayer of luminous silicate nanofilms synthesized with organoalkoxysilane precursors. Time-resolved photoluminescence demonstrated efficient energy transfer from a donor dye (coumarin) to an acceptor dye (cyanine) with a characteristic time of less than 5 ps. The copresence of slow radiative energy transfer, associated with emission and reabsorption of photons, was also confirmed in the acceptor emission decay. The relative efficiency of file slow and fast energy transfers was quantified, and found to depend oil the molecular concentration.