Energy Transfer in Nanostructured Films Containing Poly(p-phenylene vinylene) and Acceptor Species
Energy Transfer in Nanostructured Films Containing Poly(p-phenylene vinylene) and Acceptor Species
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含有聚（对亚苯基亚乙烯基）和受体物质的纳米结构薄膜中的能量转移
DOI：
10.1021/jp9000785
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发表时间：
2009
影响因子：
3.7
通讯作者：
O. N. Oliveira
中科院分区：
文献类型：
--
作者：
B. B. Postacchini;V. Zucolotto;F. Dias;A. Monkman;O. N. Oliveira
发光聚合物和合适的能量接受材料的组合可以导致纳米结构膜中的发光的分子水平控制。在这项研究中，逐层（LbL）的聚（对苯撑乙烯）（PPV）薄膜的性能进行了研究与稳态和时间分辨荧光光谱，其中荧光猝灭的控制插入惰性染料层之间的PPV供体和受体层与刚果红（CR）或镍四磺酸酞菁（NiTsPc）。PPV的激发态的动力学受到能量接受层的影响，从而证实了共振能量转移机制的存在。由于能量供体和受体单元的层状结构，能量转移与层间距离r的变化符合1/rn（n = 2或3），而不是Forster理论预测的相互作用点偶极子的1/r6。
The combination of luminescent polymers and suitable energy-accepting materials may lead to a molecular-level control of luminescence in nanostructured films. In this study, the properties of layer-by-layer (LbL) films of poly(p-phenylene vinylene) (PPV) were investigated with steady-state and time-resolved fluorescence spectroscopies, where fluorescence quenching was controlled by interposing inert polyelectrolyte layers between the PPV donor and acceptor layers made with either Congo Red (CR) or nickel tetrasulfonated phthalocyanine (NiTsPc). The dynamics of the excited state of PPV was affected by the energy-accepting layers, thus confirming the presence of resonant energy transfer mechanisms. Owing to the layered structured of both energy donor and acceptor units, energy transfer varied with the distance between layers, r, according to 1/rn with n = 2 or 3, rather than with 1/r6 predicted by the Forster theory for interacting point dipoles.