Metal and size effects on structures and photophysical properties of porphyrin-modified metal nanoclusters
Metal and size effects on structures and photophysical properties of porphyrin-modified metal nanoclusters
复制标题
金属和尺寸对卟啉修饰金属纳米团簇结构和光物理性质的影响
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
S. Fukuzumi
中科院分区：
文献类型：
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作者：
H. Imahori;Y. Kashiwagi;T. Hanada;Y. Endo;Y. Nishimura;I. Yamazaki;S. Fukuzumi
制备了三维卟啉单分子层保护的金属纳米团簇，研究了金属（Au，Ag，Au-Ag合金，Pd和Pt）和尺寸（1-3 nm）对结构和物理性能的影响.不同直径的单金属纳米团簇和金纳米团簇表面对卟啉激发单重态的猝灭速率常数基本相同。相比之下，金-银合金纳米团簇的猝灭速率常数是相应的单金属团簇（即Au或Ag）的一半。这表明，与单金属体系相比，金-银合金表面与卟啉激发单重态之间的相互作用减弱。因此，卟啉金属合金纳米团簇是一种潜在的新型人工光合材料和光催化剂。
Three-dimensional (3D) porphyrin monolayer protected metal nanoclusters (MPCs) have been prepared to examine the effects of metal (Au, Ag, Au–Ag alloy, Pd and Pt) and size (1–3 nm) on the structures and photophysical properties. The quenching rate constants of the porphyrin excited singlet state by the surfaces of mono-metal nanoclusters and gold nanoclusters with different diameters are virtually the same. In contrast, the quenching rate constant of the gold–silver alloy nanocluster is half that of the corresponding mono-metal clusters (i.e. Au or Ag). This reveals that interaction between the surface of the gold–silver alloy and the porphyrin excited singlet state is attenuated as compared wtih the mono-metal systems. Thus, porphyrin metal alloy nanoclusters are potential candidates as a new type of artificial photosynthetic materials and photocatalysts.
影响因子：
15
作者：
McIntosh, CM;Esposito, EA;Rotello, VM
通讯作者：
Rotello, VM
影响因子：
56.9
作者：
Elghanian, R;Storhoff, JJ;Mirkin, CA
通讯作者：
Mirkin, CA
影响因子：
56.9
作者：
LIN, VSY;DIMAGNO, SG;THERIEN, MJ
通讯作者：
THERIEN, MJ