Long-Lifetime and Asymmetric Singlet Oxygen Photoluminescence from Aqueous Fullerene Suspensions

	Long-Lifetime and Asymmetric Singlet Oxygen Photoluminescence from Aqueous Fullerene Suspensions
	Wang, Junhui; Leng, Jing; Yang, Heping; Sha, Guohe; Zhang, Cunhao
刊名	langmuir
	2013-07-23
卷号	29 期号:29 页码:9051-9056
ISSN号	0743-7463
通讯作者	冷静
产权排序	1,1
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.
学科主题	物理化学
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000322416700004
公开日期	2013-10-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/117668]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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.(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.