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学科主题: 物理化学
题名: Long-Lifetime and Asymmetric Singlet Oxygen Photoluminescence from Aqueous Fullerene Suspensions
作者: Wang, Junhui1;  Leng, Jing1;  Yang, Heping1;  Sha, Guohe1;  Zhang, Cunhao1
通讯作者: 冷静
刊名: LANGMUIR
发表日期: 2013-07-23
DOI: 10.1021/la401605m
卷: 29, 期:29, 页:9051-9056
收录类别: SCI
文章类型: Article
部门归属: 11
项目归属: 1105
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: The photoexcited aqueous fullerene (C-60) suspension was shown to exhibit an asymmetric photoluminescence (PL) spectrum, which, different from the symmetric spectrum observed previously in C-60 solutions or suspensions, still stems from the characteristic phosphorescence of singlet oxygen (O-2(a(1)Delta)) owing to its dependence on oxygen concentration. In contrast to the microsecond-level lifetime of O-2(a(1)Delta) in water solutions, that in our C-60 suspensions was measured at room temperature to be relatively long, about 2-3 ms, which is similar to 1000 times longer than the value reported by Bilski et al. The physical mechanism for the asymmetric O-2(a(1)Delta) PL from C-60 suspensions was studied in depth, indicating that it in fact originates from 02 molecules trapped in the C-60 lattice within the suspended C-60 aggregates (nC(60)). This mechanism, which can explain well our above results, was further validated by the nC(60)'s high-resolution transmission electron microscopy (HRTEM) images with lattice fringes and the experimental temperature dependence of O-2(a(1)Delta) lifetimes in nC(60) suspensions. Our findings suggest that the bulk-phase O-2(a(1)Delta) in aqueous nC(60) suspensions results from the diffusion of the O-2(a(1)Delta) generated within the interior of nC(60) aggregates.
关键词[WOS]: UV-IRRADIATION ;  C-60 CLUSTERS ;  WATER ;  C60 ;  PHOTOCHEMISTRY ;  TRANSFORMATION ;  NANOMATERIALS ;  DISPERSIONS ;  SOLUBILITY ;  GENERATION
语种: 英语
WOS记录号: WOS:000322416700004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/117668
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Wang, Junhui,Leng, Jing,Yang, Heping,et al. Long-Lifetime and Asymmetric Singlet Oxygen Photoluminescence from Aqueous Fullerene Suspensions[J]. LANGMUIR,2013,29(29):9051-9056.
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