Observation of non-Forster-type energy-transfer behavior in quantum dot-phthalocyanine conjugates

被引：100
|
作者：
Dayal, Smita [1 ]
Lou, Yongbing [1 ]
Samia, Anna Cristina S. [1 ]
Berlin, Jeffrey C. [1 ]
Kenney, Malcolm E. [1 ]
Burda, Clemens [1 ]
机构：
[1] Case Western Reserve Univ, Ctr Chem Dynam & Nanomat Res, Dept Chem, Cleveland, OH 44106 USA
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 43期
关键词：
D O I：
10.1021/ja063415e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The effect of linker chain length on the energy transfer from CdSe quantum dots (QDs) to silicon phthalocyanine (Pc) photodynamic therapy agents was investigated by steady-state and femtosecond time-resolved spectroscopy with 500 nm light for the specific excitation of the QD energy donor. The conjugation between the QD and the Pc was achieved with linker chains varying from 4 to 9 bond lengths by incorporating 1-6 methylene groups into the axial ligand of the Pc. With increasing chain length, the energy-transfer efficiency increased, which appears to be opposed to a purely Förster-type resonance energy-transfer behavior that is commonly discussed for the energy transfer in QD conjugates. The obtained results provide strong evidence for a capping-layer-mediated energy transfer in the QD-based donor-acceptor conjugates. Copyright © 2006 American Chemical Society.
引用
收藏
页码：13974 / 13975
页数：2
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