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学科主题物理化学
Long-Lifetime and Asymmetric Singlet Oxygen Photoluminescence from Aqueous Fullerene Suspensions
Wang, Junhui; Leng, Jing; Yang, Heping; Sha, Guohe; Zhang, Cunhao; Leng J(冷静)
刊名LANGMUIR
2013-07-23
ISSN0743-7463
DOI10.1021/la401605m
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
关键词[WOS]UV-IRRADIATION ; C-60 CLUSTERS ; WATER ; C60 ; PHOTOCHEMISTRY ; TRANSFORMATION ; NANOMATERIALS ; DISPERSIONS ; SOLUBILITY ; GENERATION
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.
语种英语
WOS记录号WOS:000322416700004
引用统计
被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/117668
专题中国科学院大连化学物理研究所
通讯作者Leng J(冷静)
作者单位Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
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.
APA Wang, Junhui,Leng, Jing,Yang, Heping,Sha, Guohe,Zhang, Cunhao,&冷静.(2013).Long-Lifetime and Asymmetric Singlet Oxygen Photoluminescence from Aqueous Fullerene Suspensions.LANGMUIR,29(29),9051-9056.
MLA Wang, Junhui,et al."Long-Lifetime and Asymmetric Singlet Oxygen Photoluminescence from Aqueous Fullerene Suspensions".LANGMUIR 29.29(2013):9051-9056.
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