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One step synthesis of silane-capped copper clusters as a sensitive optical probe and efficient catalyst for reversible color switching
Zhou, SC (Zhou, Shaochen); Li, YX (Li, Yingxuan); Wang, F (Wang, Fu); Wang, CY (Wang, Chuanyi)
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:45Pages:38897-38905
Abstract

Discrete electron energy levels emerge in ultra small metal clusters due to a strong quantum confinement effect, resulting in some intriguing, unique and superior features such as photoluminescence and catalytic activity. In the present work, silane-capped copper clusters were synthesized by a facile one-pot synthetic protocol for the first time. Electrospray ionization mass spectrometry data shows that the metal core of the cluster is mainly composed of 4-5 copper atoms, and the results of X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy indicate that the surface of the as-synthesized copper clusters is capped by a silane stabilizer. These few-atom copper clusters exhibit a dual-peak fluorescence feature, giving emission bands centered at 410 nm and 580 nm, respectively. In addition, the copper clusters also show excellent performance in chemo-sensing of hydrogen peroxide, linearly responding in a concentration range of 5-250 mu M. More interestingly, a photo-reversible color switching system based on the redox reaction of methylene blue was built up by employing these Cu clusters as a catalyst. Reduction of methylene blue by Cu clusters' chemo-catalysis at ambient conditions and oxidation of leucomethylene blue by those clusters' photocatalysis under UV light irradiation lead to a recyclable colorless-blue switching effect within similar to 3 minutes. The present work proves that the versatile silane-capped Cu clusters possess both molecular and semiconductor like properties, holding great promise in optical and catalytic application fields.

DOI10.1039/c6ra04040c
Indexed BySCI
WOS IDWOS:000374972800050
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4542
Collection环境科学与技术研究室
AffiliationChinese Acad Sci, Lab Environm Sci & Technol, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Xinjiang, Peoples R China;Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhou, SC ,Li, YX ,Wang, F ,et al. One step synthesis of silane-capped copper clusters as a sensitive optical probe and efficient catalyst for reversible color switching[J]. RSC ADVANCES,2016,6(45):38897-38905.
APA Zhou, SC ,Li, YX ,Wang, F ,&Wang, CY .(2016).One step synthesis of silane-capped copper clusters as a sensitive optical probe and efficient catalyst for reversible color switching.RSC ADVANCES,6(45),38897-38905.
MLA Zhou, SC ,et al."One step synthesis of silane-capped copper clusters as a sensitive optical probe and efficient catalyst for reversible color switching".RSC ADVANCES 6.45(2016):38897-38905.
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