Light-Induced Size-Growth of Atomically Precise Nanoclusters
Light-Induced Size-Growth of Atomically Precise Nanoclusters
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光诱导原子级精确纳米团簇的尺寸增长
DOI：
10.1021/acs.langmuir.9b01527
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发表时间：
2019
期刊：
影响因子：
3.9
通讯作者：
Zhu Manzhou
中科院分区：
文献类型：
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作者：
Tang Li;Kang Xi;Wang Shuxin;Zhu Manzhou
首次报道了[Au 23（S-c-C6）16]−（TOA）+到Au 28（S-c-C6）20纳米团簇的光诱导转变。[Au 23（S-c-C6）16]−（TOA）+纳米团簇首先被能量高于其Eg（Eg= HOMO-LUMO能隙）的光子激发为[Au 23（S-c-C6）16]·-（TOA）+，然后，带负电荷的[Au 23（S-c-C6）16]·-纳米团簇通过将一个电子转移到O2而被氧化为中性状态。得到的不稳定中性团簇[Au 23（S-c-C6）16] 0分解为更小的纳米团簇，最后重新组装成Au 28（S-c-C6）20纳米团簇。时间依赖性的紫外-可见光谱，基质辅助激光解吸/电离飞行时间质谱，电子顺磁共振，和电喷雾电离质谱表征进行监测纳米团簇的大小转变。
A photo-induced transformation from [Au23(S-c-C6)16]−(TOA)+to Au28(S-c-C6)20nanocluster was first reported in this work. The [Au23(S-c-C6)16]−(TOA)+nanocluster is first excited to [Au23(S-c-C6)16]•–(TOA)+by photons with energy higher than itsEg(Eg= HOMO – LUMO energy gap), and then, the negatively charged [Au23(S-c-C6)16]•–nanocluster was oxidized to the neutral state by transfering one electron to O2. The unstable neutral cluster [Au23(S-c-C6)16]0obtained was decomposed into smaller nanocluster and finally reassembled into the Au28(S-c-C6)20nanocluster. Time-dependent UV–vis, matrix-assisted laser desorption/ionization time of flight mass spectrometry, electron paramagnetic resonance, and electrospray ionization mass spectrometry characterizations were performed to monitor the nanocluster size transformation.